ezSQL 数据库操作类

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ez_sql_core.php

 <?php

     /**********************************************************************
     *  Author: Justin Vincent (jv@vip.ie)
     *  Web...: http://justinvincent.com
     *  Name..: ezSQL
     *  Desc..: ezSQL Core module - database abstraction library to make
     *          it very easy to deal with databases. ezSQLcore can not be used by
     *          itself (it is designed for use by database specific modules).
     *
     */

     /**********************************************************************
     *  ezSQL Constants
     */

     define('EZSQL_VERSION','2.17');
     define('OBJECT','OBJECT',true);
     define('ARRAY_A','ARRAY_A',true);
     define('ARRAY_N','ARRAY_N',true);

     /**********************************************************************
     *  Core class containg common functions to manipulate query result
     *  sets once returned
     */

     class ezSQLcore
     {

         var $trace            = false;  // same as $debug_all
         var $debug_all        = false;  // same as $trace
         var $debug_called     = false;
         var $vardump_called   = false;
         var $show_errors      = true;
         var $num_queries      = 0;
         var $last_query       = null;
         var $last_error       = null;
         var $col_info         = null;
         var $captured_errors  = array();
         var $cache_dir        = false;
         var $cache_queries    = false;
         var $cache_inserts    = false;
         var $use_disk_cache   = false;
         var $cache_timeout    = 24; // hours
         var $timers           = array();
         var $total_query_time = 0;
         var $db_connect_time  = 0;
         var $trace_log        = array();
         var $use_trace_log    = false;
         var $sql_log_file     = false;
         var $do_profile       = false;
         var $profile_times    = array();

         // == TJH == default now needed for echo of debug function
         var $debug_echo_is_on = true;

         /**********************************************************************
         *  Constructor
         */

         function ezSQLcore()
         {
         }

         /**********************************************************************
         *  Get host and port from an "host:port" notation.
         *  Returns array of host and port. If port is omitted, returns $default
         */

         function get_host_port( $host, $default = false )
         {
             $port = $default;
             if ( false !== strpos( $host, ':' ) ) {
                 list( $host, $port ) = explode( ':', $host );
                 $port = (int) $port;
             }
             return array( $host, $port );
         }

         /**********************************************************************
         *  Print SQL/DB error - over-ridden by specific DB class
         */

         function register_error($err_str)
         {
             // Keep track of last error
             $this->last_error = $err_str;

             // Capture all errors to an error array no matter what happens
             $this->captured_errors[] = array
             (
                 'error_str' => $err_str,
                 'query'     => $this->last_query
             );
         }

         /**********************************************************************
         *  Turn error handling on or off..
         */

         function show_errors()
         {
             $this->show_errors = true;
         }

         function hide_errors()
         {
             $this->show_errors = false;
         }

         /**********************************************************************
         *  Kill cached query results
         */

         function flush()
         {
             // Get rid of these
             $this->last_result = null;
             $this->col_info = null;
             $this->last_query = null;
             $this->from_disk_cache = false;
         }

         /**********************************************************************
         *  Get one variable from the DB - see docs for more detail
         */

         function get_var($query=null,$x=0,$y=0)
         {

             // Log how the function was called
             $this->func_call = "\$db->get_var(\"$query\",$x,$y)";

             // If there is a query then perform it if not then use cached results..
             if ( $query )
             {
                 $this->query($query);
             }

             // Extract var out of cached results based x,y vals
             if ( $this->last_result[$y] )
             {
                 $values = array_values(get_object_vars($this->last_result[$y]));
             }

             // If there is a value return it else return null
             return (isset($values[$x]) && $values[$x]!=='')?$values[$x]:null;
         }

         /**********************************************************************
         *  Get one row from the DB - see docs for more detail
         */

         function get_row($query=null,$output=OBJECT,$y=0)
         {

             // Log how the function was called
             $this->func_call = "\$db->get_row(\"$query\",$output,$y)";

             // If there is a query then perform it if not then use cached results..
             if ( $query )
             {
                 $this->query($query);
             }

             // If the output is an object then return object using the row offset..
             if ( $output == OBJECT )
             {
                 return $this->last_result[$y]?$this->last_result[$y]:null;
             }
             // If the output is an associative array then return row as such..
             elseif ( $output == ARRAY_A )
             {
                 return $this->last_result[$y]?get_object_vars($this->last_result[$y]):null;
             }
             // If the output is an numerical array then return row as such..
             elseif ( $output == ARRAY_N )
             {
                 return $this->last_result[$y]?array_values(get_object_vars($this->last_result[$y])):null;
             }
             // If invalid output type was specified..
             else
             {
                 $this->show_errors ? trigger_error(" \$db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N",E_USER_WARNING) : null;
             }

         }

         /**********************************************************************
         *  Function to get 1 column from the cached result set based in X index
         *  see docs for usage and info
         */

         function get_col($query=null,$x=0)
         {

             $new_array = array();

             // If there is a query then perform it if not then use cached results..
             if ( $query )
             {
                 $this->query($query);
             }

             // Extract the column values
             for ( $i=0; $i < count($this->last_result); $i++ )
             {
                 $new_array[$i] = $this->get_var(null,$x,$i);
             }

             return $new_array;
         }

         /**********************************************************************
         *  Return the the query as a result set - see docs for more details
         */

         function get_results($query=null, $output = OBJECT)
         {

             // Log how the function was called
             $this->func_call = "\$db->get_results(\"$query\", $output)";

             // If there is a query then perform it if not then use cached results..
             if ( $query )
             {
                 $this->query($query);
             }

             // Send back array of objects. Each row is an object
             if ( $output == OBJECT )
             {
                 return $this->last_result;
             }
             elseif ( $output == ARRAY_A || $output == ARRAY_N )
             {
                 if ( $this->last_result )
                 {
                     $i=0;
                     foreach( $this->last_result as $row )
                     {

                         $new_array[$i] = get_object_vars($row);

                         if ( $output == ARRAY_N )
                         {
                             $new_array[$i] = array_values($new_array[$i]);
                         }

                         $i++;
                     }

                     return $new_array;
                 }
                 else
                 {
                     return array();
                 }
             }
         }

         /**********************************************************************
         *  Function to get column meta data info pertaining to the last query
         * see docs for more info and usage
         */

         function get_col_info($info_type="name",$col_offset=-1)
         {

             if ( $this->col_info )
             {
                 if ( $col_offset == -1 )
                 {
                     $i=0;
                     foreach($this->col_info as $col )
                     {
                         $new_array[$i] = $col->{$info_type};
                         $i++;
                     }
                     return $new_array;
                 }
                 else
                 {
                     return $this->col_info[$col_offset]->{$info_type};
                 }

             }

         }

         /**********************************************************************
         *  store_cache
         */

         function store_cache($query,$is_insert)
         {

             // The would be cache file for this query
             $cache_file = $this->cache_dir.'/'.md5($query);

             // disk caching of queries
             if ( $this->use_disk_cache && ( $this->cache_queries && ! $is_insert ) || ( $this->cache_inserts && $is_insert ))
             {
                 if ( ! is_dir($this->cache_dir) )
                 {
                     $this->register_error("Could not open cache dir: $this->cache_dir");
                     $this->show_errors ? trigger_error("Could not open cache dir: $this->cache_dir",E_USER_WARNING) : null;
                 }
                 else
                 {
                     // Cache all result values
                     $result_cache = array
                     (
                         'col_info' => $this->col_info,
                         'last_result' => $this->last_result,
                         'num_rows' => $this->num_rows,
                         'return_value' => $this->num_rows,
                     );
                     file_put_contents($cache_file, serialize($result_cache));
                     if( file_exists($cache_file . ".updating") )
                         unlink($cache_file . ".updating");
                 }
             }

         }

         /**********************************************************************
         *  get_cache
         */

         function get_cache($query)
         {

             // The would be cache file for this query
             $cache_file = $this->cache_dir.'/'.md5($query);

             // Try to get previously cached version
             if ( $this->use_disk_cache && file_exists($cache_file) )
             {
                 // Only use this cache file if less than 'cache_timeout' (hours)
                 if ( (time() - filemtime($cache_file)) > ($this->cache_timeout*3600) &&
                     !(file_exists($cache_file . ".updating") && (time() - filemtime($cache_file . ".updating") < 60)) )
                 {
                     touch($cache_file . ".updating"); // Show that we in the process of updating the cache
                 }
                 else
                 {
                     $result_cache = unserialize(file_get_contents($cache_file));

                     $this->col_info = $result_cache['col_info'];
                     $this->last_result = $result_cache['last_result'];
                     $this->num_rows = $result_cache['num_rows'];

                     $this->from_disk_cache = true;

                     // If debug ALL queries
                     $this->trace || $this->debug_all ? $this->debug() : null ;

                     return $result_cache['return_value'];
                 }
             }

         }

         /**********************************************************************
         *  Dumps the contents of any input variable to screen in a nicely
         *  formatted and easy to understand way - any type: Object, Var or Array
         */

         function vardump($mixed='')
         {

             // Start outup buffering
             ob_start();

             echo "<p><table><tr><td bgcolor=ffffff><blockquote><font color=000090>";
             echo "<pre><font face=arial>";

             if ( ! $this->vardump_called )
             {
                 echo "<font color=800080><b>ezSQL</b> (v".EZSQL_VERSION.") <b>Variable Dump..</b></font>\n\n";
             }

             $var_type = gettype ($mixed);
             print_r(($mixed?$mixed:"<font color=red>No Value / False</font>"));
             echo "\n\n<b>Type:</b> " . ucfirst($var_type) . "\n";
             echo "<b>Last Query</b> [$this->num_queries]<b>:</b> ".($this->last_query?$this->last_query:"NULL")."\n";
             echo "<b>Last Function Call:</b> " . ($this->func_call?$this->func_call:"None")."\n";
             echo "<b>Last Rows Returned:</b> ".count($this->last_result)."\n";
             echo "</font></pre></font></blockquote></td></tr></table>".$this->donation();
             echo "\n<hr size=1 noshade color=dddddd>";

             // Stop output buffering and capture debug HTML
             $html = ob_get_contents();
             ob_end_clean();

             // Only echo output if it is turned on
             if ( $this->debug_echo_is_on )
             {
                 echo $html;
             }

             $this->vardump_called = true;

             return $html;

         }

         /**********************************************************************
         *  Alias for the above function
         */

         function dumpvar($mixed)
         {
             $this->vardump($mixed);
         }

         /**********************************************************************
         *  Displays the last query string that was sent to the database & a
         * table listing results (if there were any).
         * (abstracted into a seperate file to save server overhead).
         */

         function debug($print_to_screen=true)
         {

             // Start outup buffering
             ob_start();

             echo "<blockquote>";

             // Only show ezSQL credits once..
             if ( ! $this->debug_called )
             {
                 echo "<font color=800080 face=arial size=2><b>ezSQL</b> (v".EZSQL_VERSION.") <b>Debug..</b></font><p>\n";
             }

             if ( $this->last_error )
             {
                 echo "<font face=arial size=2 color=000099><b>Last Error --</b> [<font color=000000><b>$this->last_error</b></font>]<p>";
             }

             if ( $this->from_disk_cache )
             {
                 echo "<font face=arial size=2 color=000099><b>Results retrieved from disk cache</b></font><p>";
             }

             echo "<font face=arial size=2 color=000099><b>Query</b> [$this->num_queries] <b>--</b> ";
             echo "[<font color=000000><b>$this->last_query</b></font>]</font><p>";

                 echo "<font face=arial size=2 color=000099><b>Query Result..</b></font>";
                 echo "<blockquote>";

             if ( $this->col_info )
             {

                 // =====================================================
                 // Results top rows

                 echo "<table cellpadding=5 cellspacing=1 bgcolor=555555>";
                 echo "<tr bgcolor=eeeeee><td nowrap valign=bottom><font color=555599 face=arial size=2><b>(row)</b></font></td>";

                 for ( $i=0; $i < count($this->col_info); $i++ )
                 {
                     /* when selecting count(*) the maxlengh is not set, size is set instead. */
                     echo "<td nowrap align=left valign=top><font size=1 color=555599 face=arial>{$this->col_info[$i]->type}";
                     if (!isset($this->col_info[$i]->max_length))
                     {
                         echo "{$this->col_info[$i]->size}";
                     } else {
                         echo "{$this->col_info[$i]->max_length}";
                     }
                     echo "</font><br><span style='font-family: arial; font-size: 10pt; font-weight: bold;'>{$this->col_info[$i]->name}</span></td>";
                 }

                 echo "</tr>";

                 // ======================================================
                 // print main results

             if ( $this->last_result )
             {

                 $i=0;
                 foreach ( $this->get_results(null,ARRAY_N) as $one_row )
                 {
                     $i++;
                     echo "<tr bgcolor=ffffff><td bgcolor=eeeeee nowrap align=middle><font size=2 color=555599 face=arial>$i</font></td>";

                     foreach ( $one_row as $item )
                     {
                         echo "<td nowrap><font face=arial size=2>$item</font></td>";
                     }

                     echo "</tr>";
                 }

             } // if last result
             else
             {
                 echo "<tr bgcolor=ffffff><td colspan=".(count($this->col_info)+1)."><font face=arial size=2>No Results</font></td></tr>";
             }

             echo "</table>";

             } // if col_info
             else
             {
                 echo "<font face=arial size=2>No Results</font>";
             }

             echo "</blockquote></blockquote>".$this->donation()."<hr noshade color=dddddd size=1>";

             // Stop output buffering and capture debug HTML
             $html = ob_get_contents();
             ob_end_clean();

             // Only echo output if it is turned on
             if ( $this->debug_echo_is_on && $print_to_screen)
             {
                 echo $html;
             }

             $this->debug_called = true;

             return $html;

         }

         /**********************************************************************
         *  Naughty little function to ask for some remuniration!
         */

         function donation()
         {
             return "<font size=1 face=arial color=000000>If ezSQL has helped <a href=\"https://www.paypal.com/xclick/business=justin%40justinvincent.com&item_name=ezSQL&no_note=1&tax=0\" style=\"color: 0000CC;\">make a donation!?</a> &nbsp;&nbsp;<!--[ go on! you know you want to! ]--></font>";
         }

         /**********************************************************************
         *  Timer related functions
         */

         function timer_get_cur()
         {
             list($usec, $sec) = explode(" ",microtime());
             return ((float)$usec + (float)$sec);
         }

         function timer_start($timer_name)
         {
             $this->timers[$timer_name] = $this->timer_get_cur();
         }

         function timer_elapsed($timer_name)
         {
             return round($this->timer_get_cur() - $this->timers[$timer_name],2);
         }

         function timer_update_global($timer_name)
         {
             if ( $this->do_profile )
             {
                 $this->profile_times[] = array
                 (
                     'query' => $this->last_query,
                     'time' => $this->timer_elapsed($timer_name)
                 );
             }

             $this->total_query_time += $this->timer_elapsed($timer_name);
         }

         /**********************************************************************
         * Creates a SET nvp sql string from an associative array (and escapes all values)
         *
         *  Usage:
         *
         *     $db_data = array('login'=>'jv','email'=>'jv@vip.ie', 'user_id' => 1, 'created' => 'NOW()');
         *
         *     $db->query("INSERT INTO users SET ".$db->get_set($db_data));
         *
         *     ...OR...
         *
         *     $db->query("UPDATE users SET ".$db->get_set($db_data)." WHERE user_id = 1");
         *
         * Output:
         *
         *     login = 'jv', email = 'jv@vip.ie', user_id = 1, created = NOW()
         */

         function get_set($params)
         {
             if( !is_array( $params ) )
             {
                 $this->register_error( 'get_set() parameter invalid. Expected array in '.__FILE__.' on line '.__LINE__);
                 return;
             }
             $sql = array();
             foreach ( $params as $field => $val )
             {
                 if ( $val === 'true' || $val === true )
                     $val = 1;
                 if ( $val === 'false' || $val === false )
                     $val = 0;

                 switch( $val ){
                     case 'NOW()' :
                     case 'NULL' :
                       $sql[] = "$field = $val";
                         break;
                     default :
                         $sql[] = "$field = '".$this->escape( $val )."'";
                 }
             }

             return implode( ', ' , $sql );
         }

     }

//ez_sql_mysql.php

 <?php

     /**********************************************************************
     *  Author: Justin Vincent (jv@jvmultimedia.com)
     *  Web...: http://twitter.com/justinvincent
     *  Name..: ezSQL_mysql
     *  Desc..: mySQL component (part of ezSQL databse abstraction library)
     *
     */

     /**********************************************************************
     *  ezSQL error strings - mySQL
     */

     global $ezsql_mysql_str;

     $ezsql_mysql_str = array
     (
         1 => 'Require $dbuser and $dbpassword to connect to a database server',
         2 => 'Error establishing mySQL database connection. Correct user/password? Correct hostname? Database server running?',
         3 => 'Require $dbname to select a database',
         4 => 'mySQL database connection is not active',
         5 => 'Unexpected error while trying to select database'
     );

     /**********************************************************************
     *  ezSQL Database specific class - mySQL
     */

     if ( ! function_exists ('mysql_connect') ) die('<b>Fatal Error:</b> ezSQL_mysql requires mySQL Lib to be compiled and or linked in to the PHP engine');
     if ( ! class_exists ('ezSQLcore') ) die('<b>Fatal Error:</b> ezSQL_mysql requires ezSQLcore (ez_sql_core.php) to be included/loaded before it can be used');

     class ezSQL_mysql extends ezSQLcore
     {

         var $dbuser = false;
         var $dbpassword = false;
         var $dbname = false;
         var $dbhost = false;
         var $encoding = false;
         var $rows_affected = false;

         /**********************************************************************
         *  Constructor - allow the user to perform a quick connect at the
         *  same time as initialising the ezSQL_mysql class
         */

         function ezSQL_mysql($dbuser='', $dbpassword='', $dbname='', $dbhost='localhost', $encoding='')
         {
             $this->dbuser = $dbuser;
             $this->dbpassword = $dbpassword;
             $this->dbname = $dbname;
             $this->dbhost = $dbhost;
             $this->encoding = $encoding;
         }

         /**********************************************************************
         *  Short hand way to connect to mySQL database server
         *  and select a mySQL database at the same time
         */

         function quick_connect($dbuser='', $dbpassword='', $dbname='', $dbhost='localhost', $encoding='')
         {
             $return_val = false;
             if ( ! $this->connect($dbuser, $dbpassword, $dbhost,true) ) ;
             else if ( ! $this->select($dbname,$encoding) ) ;
             else $return_val = true;
             return $return_val;
         }

         /**********************************************************************
         *  Try to connect to mySQL database server
         */

         function connect($dbuser='', $dbpassword='', $dbhost='localhost')
         {
             global $ezsql_mysql_str; $return_val = false;

             // Keep track of how long the DB takes to connect
             $this->timer_start('db_connect_time');

             // Must have a user and a password
             if ( ! $dbuser )
             {
                 $this->register_error($ezsql_mysql_str[1].' in '.__FILE__.' on line '.__LINE__);
                 $this->show_errors ? trigger_error($ezsql_mysql_str[1],E_USER_WARNING) : null;
             }
             // Try to establish the server database handle
             else if ( ! $this->dbh = @mysql_connect($dbhost,$dbuser,$dbpassword,true,131074) )
             {
                 $this->register_error($ezsql_mysql_str[2].' in '.__FILE__.' on line '.__LINE__);
                 $this->show_errors ? trigger_error($ezsql_mysql_str[2],E_USER_WARNING) : null;
             }
             else
             {
                 $this->dbuser = $dbuser;
                 $this->dbpassword = $dbpassword;
                 $this->dbhost = $dbhost;
                 $return_val = true;
             }

             return $return_val;
         }

         /**********************************************************************
         *  Try to select a mySQL database
         */

         function select($dbname='', $encoding='')
         {
             global $ezsql_mysql_str; $return_val = false;

             // Must have a database name
             if ( ! $dbname )
             {
                 $this->register_error($ezsql_mysql_str[3].' in '.__FILE__.' on line '.__LINE__);
                 $this->show_errors ? trigger_error($ezsql_mysql_str[3],E_USER_WARNING) : null;
             }

             // Must have an active database connection
             else if ( ! $this->dbh )
             {
                 $this->register_error($ezsql_mysql_str[4].' in '.__FILE__.' on line '.__LINE__);
                 $this->show_errors ? trigger_error($ezsql_mysql_str[4],E_USER_WARNING) : null;
             }

             // Try to connect to the database
             else if ( !@mysql_select_db($dbname,$this->dbh) )
             {
                 // Try to get error supplied by mysql if not use our own
                 if ( !$str = @mysql_error($this->dbh))
                       $str = $ezsql_mysql_str[5];

                 $this->register_error($str.' in '.__FILE__.' on line '.__LINE__);
                 $this->show_errors ? trigger_error($str,E_USER_WARNING) : null;
             }
             else
             {
                 $this->dbname = $dbname;
                 if ( $encoding == '') $encoding = $this->encoding;
                 if($encoding!='')
                 {
                     $encoding = strtolower(str_replace("-","",$encoding));
                     $charsets = array();
                     $result = mysql_query("SHOW CHARACTER SET");
                     while($row = mysql_fetch_array($result,MYSQL_ASSOC))
                     {
                         $charsets[] = $row["Charset"];
                     }
                     if(in_array($encoding,$charsets)){
                         mysql_query("SET NAMES '".$encoding."'");
                     }
                 }

                 $return_val = true;
             }

             return $return_val;
         }

         /**********************************************************************
         *  Format a mySQL string correctly for safe mySQL insert
         *  (no mater if magic quotes are on or not)
         */

         function escape($str)
         {
             // If there is no existing database connection then try to connect
             if ( ! isset($this->dbh) || ! $this->dbh )
             {
                 $this->connect($this->dbuser, $this->dbpassword, $this->dbhost);
                 $this->select($this->dbname, $this->encoding);
             }

             return mysql_real_escape_string(stripslashes($str));
         }

         /**********************************************************************
         *  Return mySQL specific system date syntax
         *  i.e. Oracle: SYSDATE Mysql: NOW()
         */

         function sysdate()
         {
             return 'NOW()';
         }

         /**********************************************************************
         *  Perform mySQL query and try to detirmin result value
         */

         function query($query)
         {

             // This keeps the connection alive for very long running scripts
             if ( $this->num_queries >= 500 )
             {
                 $this->num_queries = 0;
                 $this->disconnect();
                 $this->quick_connect($this->dbuser,$this->dbpassword,$this->dbname,$this->dbhost,$this->encoding);
             }

             // Initialise return
             $return_val = 0;

             // Flush cached values..
             $this->flush();

             // For reg expressions
             $query = trim($query);

             // Log how the function was called
             $this->func_call = "\$db->query(\"$query\")";

             // Keep track of the last query for debug..
             $this->last_query = $query;

             // Count how many queries there have been
             $this->num_queries++;

             // Start timer
             $this->timer_start($this->num_queries);

             // Use core file cache function
             if ( $cache = $this->get_cache($query) )
             {
                 // Keep tack of how long all queries have taken
                 $this->timer_update_global($this->num_queries);

                 // Trace all queries
                 if ( $this->use_trace_log )
                 {
                     $this->trace_log[] = $this->debug(false);
                 }

                 return $cache;
             }

             // If there is no existing database connection then try to connect
             if ( ! isset($this->dbh) || ! $this->dbh )
             {
                 $this->connect($this->dbuser, $this->dbpassword, $this->dbhost);
                 $this->select($this->dbname,$this->encoding);
                 // No existing connection at this point means the server is unreachable
                 if ( ! isset($this->dbh) || ! $this->dbh )
                     return false;
             }

             // Perform the query via std mysql_query function..
             $this->result = @mysql_query($query,$this->dbh);

             // If there is an error then take note of it..
             if ( $str = @mysql_error($this->dbh) )
             {
                 $this->register_error($str);
                 $this->show_errors ? trigger_error($str,E_USER_WARNING) : null;
                 return false;
             }

             // Query was an insert, delete, update, replace
             if ( preg_match("/^(insert|delete|update|replace|truncate|drop|create|alter|set|lock|unlock)\s+/i",$query) )
             {
                 $is_insert = true;
                 $this->rows_affected = @mysql_affected_rows($this->dbh);

                 // Take note of the insert_id
                 if ( preg_match("/^(insert|replace)\s+/i",$query) )
                 {
                     $this->insert_id = @mysql_insert_id($this->dbh);
                 }

                 // Return number fo rows affected
                 $return_val = $this->rows_affected;
             }
             // Query was a select
             else
             {
                 $is_insert = false;

                 // Take note of column info
                 $i=0;
                 while ($i < @mysql_num_fields($this->result))
                 {
                     $this->col_info[$i] = @mysql_fetch_field($this->result);
                     $i++;
                 }

                 // Store Query Results
                 $num_rows=0;
                 while ( $row = @mysql_fetch_object($this->result) )
                 {
                     // Store relults as an objects within main array
                     $this->last_result[$num_rows] = $row;
                     $num_rows++;
                 }

                 @mysql_free_result($this->result);

                 // Log number of rows the query returned
                 $this->num_rows = $num_rows;

                 // Return number of rows selected
                 $return_val = $this->num_rows;
             }

             // disk caching of queries
             $this->store_cache($query,$is_insert);

             // If debug ALL queries
             $this->trace || $this->debug_all ? $this->debug() : null ;

             // Keep tack of how long all queries have taken
             $this->timer_update_global($this->num_queries);

             // Trace all queries
             if ( $this->use_trace_log )
             {
                 $this->trace_log[] = $this->debug(false);
             }

             return $return_val;

         }

         /**********************************************************************
         *  Close the active mySQL connection
         */

         function disconnect()
         {
             @mysql_close($this->dbh);
         }

     }
 　　

//disk_cache_example.php

 <?php

     // Standard ezSQL Libs
     include_once "../shared/ez_sql_core.php";
     include_once "ez_sql_mysql.php";

     // Initialise singleton
     $db = new ezSQL_mysql('db_user', 'db_pass', 'db_name');

     // Cache expiry
     $db->cache_timeout = 24; // Note: this is hours

     // Specify a cache dir. Path is taken from calling script
     $db->cache_dir = 'ezsql_cache';

     // (1. You must create this dir. first!)
     // (2. Might need to do chmod 775)

     // Global override setting to turn disc caching off
     // (but not on)
     $db->use_disk_cache = true;

     // By wrapping up queries you can ensure that the default
     // is NOT to cache unless specified
     $db->cache_queries = true;

         // At last.. a query!
         $db->get_results("SHOW TABLES");
         $db->debug();

         // Select * from use
         $db->get_results("SELECT * FROM User");
         $db->debug();

     // This ensures only the above querys are cached
     $db->cache_queries = false;

     // This query is NOT cached
     $db->get_results("SELECT * FROM User LIMIT 0,1");
     $db->debug();

 /*

     Of course, if you want to cache EVERYTHING just do..

     $db = new ezSQL_mysql('db_user', 'db_pass', 'db_name');
     $db->use_disk_cache = true;
     $db->cache_queries = true;
     $db->cache_timeout = 24;

 */

 ?>

//ez_sql_core_202console.php

 <?php
 // =================================================================
 // == TJH ==  To provide optional return value as opposed to simple echo
 // == TJH ==  of the $db->vardump  and   $db->debug  functions

 // == TJH ==  Helpful for assigning the output to a var for handling in situations like template
 // == TJH ==  engines where you want the debugging output rendered in a particular location.

 // == TJH ==  This latest version 0.2 alpha includes a modification that allows
 // == TJH ==  the original dump and debug behaviours to be maintained by default
 // == TJH ==  and hopefully be backward compatible with previous ezSQL versions 

 // == TJH ==  USAGE:     $ezdump = print_r($db->vardump($result),true);
 // == TJH ==  USAGE:     $ezconsole = print_r($db->console,true);
 // =================================================================

     /**********************************************************************
     *  Author: Justin Vincent (jv@jvmultimedia.com)
     *  Web...: http://twitter.com/justinvincent
     *  Name..: ezSQL
     *  Desc..: ezSQL Core module - database abstraction library to make
     *          it very easy to deal with databases.
     *
     */

     /**********************************************************************
     *  ezSQL Constants
     */

     define('EZSQL_VERSION','2.02-console');
     define('OBJECT','OBJECT',true);
     define('ARRAY_A','ARRAY_A',true);
     define('ARRAY_N','ARRAY_N',true);
     define('EZSQL_CORE_ERROR','ezSQLcore can not be used by itself (it is designed for use by database specific modules).');

     /**********************************************************************
     *  Core class containg common functions to manipulate query result
     *  sets once returned
     */

     class ezSQLcore
     {

         var $trace           = false;  // same as $debug_all
         var $debug_all       = false;  // same as $trace
         // === TJH ===
         var $debug_echo = true;        // == TJH ==  // default now needed for echo of debug function
         var $debug_called    = false;
         var $vardump_called  = false;
         var $show_errors     = true;
         var $num_queries     = 0;
         var $last_query      = null;
         var $last_error      = null;
         var $col_info        = null;
         var $captured_errors = array();
         var $cache_dir       = false;
         var $cache_queries   = false;
         var $cache_inserts   = false;
         var $use_disk_cache  = false;
         var $cache_timeout   = 24; // hours

         /**********************************************************************
         *  Constructor
         */

         function ezSQLcore()
         {
         }

         /**********************************************************************
         *  Connect to DB - over-ridden by specific DB class
         */

         function connect()
         {
             die(EZSQL_CORE_ERROR);
         }

         /**********************************************************************
         *  Select DB - over-ridden by specific DB class
         */

         function select()
         {
             die(EZSQL_CORE_ERROR);
         }

         /**********************************************************************
         *  Basic Query    - over-ridden by specific DB class
         */

         function query()
         {
             die(EZSQL_CORE_ERROR);
         }

         /**********************************************************************
         *  Format a string correctly for safe insert - over-ridden by specific
         *  DB class
         */

         function escape()
         {
             die(EZSQL_CORE_ERROR);
         }

         /**********************************************************************
         *  Return database specific system date syntax
         *  i.e. Oracle: SYSDATE Mysql: NOW()
         */

         function sysdate()
         {
             die(EZSQL_CORE_ERROR);
         }

         /**********************************************************************
         *  Print SQL/DB error - over-ridden by specific DB class
         */

         function register_error($err_str)
         {
             // Keep track of last error
             $this->last_error = $err_str;

             // Capture all errors to an error array no matter what happens
             $this->captured_errors[] = array
             (
                 'error_str' => $err_str,
                 'query'     => $this->last_query
             );
         }

         /**********************************************************************
         *  Turn error handling on or off..
         */

         function show_errors()
         {
             $this->show_errors = true;
         }

         function hide_errors()
         {
             $this->show_errors = false;
         }

         /**********************************************************************
         *  Kill cached query results
         */

         function flush()
         {
             // Get rid of these
             $this->last_result = null;
             $this->col_info = null;
             $this->last_query = null;
             $this->from_disk_cache = false;
         }

         /**********************************************************************
         *  Get one variable from the DB - see docs for more detail
         */

         function get_var($query=null,$x=0,$y=0)
         {

             // Log how the function was called
             $this->func_call = "\$db->get_var(\"$query\",$x,$y)";

             // If there is a query then perform it if not then use cached results..
             if ( $query )
             {
                 $this->query($query);
             }

             // Extract var out of cached results based x,y vals
             if ( $this->last_result[$y] )
             {
                 $values = array_values(get_object_vars($this->last_result[$y]));
             }

             // If there is a value return it else return null
             return (isset($values[$x]) && $values[$x]!=='')?$values[$x]:null;
         }

         /**********************************************************************
         *  Get one row from the DB - see docs for more detail
         */

         function get_row($query=null,$output=OBJECT,$y=0)
         {

             // Log how the function was called
             $this->func_call = "\$db->get_row(\"$query\",$output,$y)";

             // If there is a query then perform it if not then use cached results..
             if ( $query )
             {
                 $this->query($query);
             }

             // If the output is an object then return object using the row offset..
             if ( $output == OBJECT )
             {
                 return $this->last_result[$y]?$this->last_result[$y]:null;
             }
             // If the output is an associative array then return row as such..
             elseif ( $output == ARRAY_A )
             {
                 return $this->last_result[$y]?get_object_vars($this->last_result[$y]):null;
             }
             // If the output is an numerical array then return row as such..
             elseif ( $output == ARRAY_N )
             {
                 return $this->last_result[$y]?array_values(get_object_vars($this->last_result[$y])):null;
             }
             // If invalid output type was specified..
             else
             {
                 $this->print_error(" \$db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N");
             }

         }

         /**********************************************************************
         *  Function to get 1 column from the cached result set based in X index
         *  see docs for usage and info
         */

         function get_col($query=null,$x=0)
         {

             // If there is a query then perform it if not then use cached results..
             if ( $query )
             {
                 $this->query($query);
             }

             // Extract the column values
             for ( $i=0; $i < count($this->last_result); $i++ )
             {
                 $new_array[$i] = $this->get_var(null,$x,$i);
             }

             return $new_array;
         }

         /**********************************************************************
         *  Return the the query as a result set - see docs for more details
         */

         function get_results($query=null, $output = OBJECT)
         {

             // Log how the function was called
             $this->func_call = "\$db->get_results(\"$query\", $output)";

             // If there is a query then perform it if not then use cached results..
             if ( $query )
             {
                 $this->query($query);
             }

             // Send back array of objects. Each row is an object
             if ( $output == OBJECT )
             {
                 return $this->last_result;
             }
             elseif ( $output == ARRAY_A || $output == ARRAY_N )
             {
                 if ( $this->last_result )
                 {
                     $i=0;
                     foreach( $this->last_result as $row )
                     {

                         $new_array[$i] = get_object_vars($row);

                         if ( $output == ARRAY_N )
                         {
                             $new_array[$i] = array_values($new_array[$i]);
                         }

                         $i++;
                     }

                     return $new_array;
                 }
                 else
                 {
                     return array();
                 }
             }
         }

         /**********************************************************************
         *  Function to get column meta data info pertaining to the last query
         * see docs for more info and usage
         */

         function get_col_info($info_type="name",$col_offset=-1)
         {

             if ( $this->col_info )
             {
                 if ( $col_offset == -1 )
                 {
                     $i=0;
                     foreach($this->col_info as $col )
                     {
                         $new_array[$i] = $col->{$info_type};
                         $i++;
                     }
                     return $new_array;
                 }
                 else
                 {
                     return $this->col_info[$col_offset]->{$info_type};
                 }

             }

         }

         /**********************************************************************
         *  store_cache
         */

         function store_cache($query,$is_insert)
         {

             // The would be cache file for this query
             $cache_file = $this->cache_dir.'/'.md5($query);

             // disk caching of queries
             if ( $this->use_disk_cache && ( $this->cache_queries && ! $is_insert ) || ( $this->cache_inserts && $is_insert ))
             {
                 if ( ! is_dir($this->cache_dir) )
                 {
                     $this->register_error("Could not open cache dir: $this->cache_dir");
                     $this->show_errors ? trigger_error("Could not open cache dir: $this->cache_dir",E_USER_WARNING) : null;
                 }
                 else
                 {
                     // Cache all result values
                     $result_cache = array
                     (
                         'col_info' => $this->col_info,
                         'last_result' => $this->last_result,
                         'num_rows' => $this->num_rows,
                         'return_value' => $this->num_rows,
                     );
                     error_log ( serialize($result_cache), 3, $cache_file);
                 }
             }

         }

         /**********************************************************************
         *  get_cache
         */

         function get_cache($query)
         {

             // The would be cache file for this query
             $cache_file = $this->cache_dir.'/'.md5($query);

             // Try to get previously cached version
             if ( $this->use_disk_cache && file_exists($cache_file) )
             {
                 // Only use this cache file if less than 'cache_timeout' (hours)
                 if ( (time() - filemtime($cache_file)) > ($this->cache_timeout*3600) )
                 {
                     unlink($cache_file);
                 }
                 else
                 {
                     $result_cache = unserialize(file_get_contents($cache_file));

                     $this->col_info = $result_cache['col_info'];
                     $this->last_result = $result_cache['last_result'];
                     $this->num_rows = $result_cache['num_rows'];

                     $this->from_disk_cache = true;

                     // If debug ALL queries
                     $this->trace || $this->debug_all ? $this->debug() : null ;

                     return $result_cache['return_value'];
                 }
             }

         }

         /**********************************************************************
         *  Dumps the contents of any input variable to screen in a nicely
         *  formatted and easy to understand way - any type: Object, Var or Array
         */

         // === TJH ===  This is hacked to OPTIONALLY generate a "$return_var"
         // === TJH ===   must also set $db->debug_echo = false; in your script to override default behaviour
         // === TJH ===   instead of a simple "echo" to the current screen (DEFAULT)
         // === TJH ===    USAGE:     $ezdebug = print_r($db->vardump($result),true);        

         function vardump($mixed='')
         {
             $return_var .=   "<p><table><tr><td bgcolor=ffffff><blockquote><font color=000090>";
             $return_var .=   "<pre><font face=arial>";

             if ( ! $this->vardump_called )
             {
                 $return_var .=   "<font color=800080><b>ezSQL</b> (v".EZSQL_VERSION.") <b>Variable Dump..</b></font>\n\n";
             }

             $var_type = gettype ($mixed);
             $return_var .=  print_r(($mixed?$mixed:"<font color=red>No Value / False</font>"),true);
             $return_var .=   "\n\n<b>Type:</b> " . ucfirst($var_type) . "\n";
             $return_var .=   "<b>Last Query</b> [$this->num_queries]<b>:</b> ".($this->last_query?$this->last_query:"NULL")."\n";
             $return_var .=   "<b>Last Function Call:</b> " . ($this->func_call?$this->func_call:"None")."\n";
             $return_var .=   "<b>Last Rows Returned:</b> ".count($this->last_result)."\n";
             $return_var .=   "</font></pre></font></blockquote></td></tr></table>".$this->donation();
             $return_var .=   "\n<hr size=1 noshade color=dddddd>";

             $this->vardump_called = true;
             if($this->debug_echo){
             echo $return_var;
             }

             return $return_var;
         }

         /**********************************************************************
         *  Alias for the above function
         */

         function dumpvar($mixed)
         {
             $this->vardump($mixed);
         }

         /**********************************************************************
         *  Displays the last query string that was sent to the database & a
         * table listing results (if there were any).
         * (abstracted into a seperate file to save server overhead).
         */

         // === TJH ===  The debug() function is now hacked to OPTIOANLLY create a return result
         // === TJH ===  that can be called as a variable, just changed all "echo"s to "$this->console .= "
         // === TJH ===  this is accessed with "$db->console" obviously
         // === TJH ===  n.b. you must also set $db->debug_echo = false; to override default behaviour        

         function debug($debug_echo)     // === TJH ===   set a default for function to be able to switch "echo" on/off
         {

             //$this->console .=  "<blockquote>"; // === TJH == commented out to change output formatting slightly
             // Only show ezSQL credits once..
             if ( ! $this->debug_called )
             {
                 $this->console .=  "<font color=800080 face=arial size=2><b>ezSQL</b> (v".EZSQL_VERSION.") <b>Debug..</b></font><p>\n";
             }

             if ( $this->last_error )
             {
                 $this->console .=  "<font face=arial size=2 color=000099><b>Last Error --</b> [<font color=000000><b>$this->last_error</b></font>]<p>";
             }

             if ( $this->from_disk_cache )
             {
                 $this->console .=  "<font face=arial size=2 color=000099><b>Results retrieved from disk cache</b></font><p>";
             }

             $this->console .=  "<font face=arial size=2 color=000099><b>Query</b> [$this->num_queries] <b>--</b> ";
             $this->console .=  "[<font color=000000><b>$this->last_query</b></font>]</font><p>";

             $this->console .=  "<font face=arial size=2 color=000099><b>Query Result..</b></font>";
             $this->console .=  "<blockquote>";

             if ( $this->col_info )
             {

                 // =====================================================
                 // Results top rows

                 $this->console .=  "<table cellpadding=5 cellspacing=1 bgcolor=555555>";
                 $this->console .=  "<tr bgcolor=eeeeee><td nowrap valign=bottom><font color=555599 face=arial size=2><b>(row)</b></font></td>";

                 for ( $i=0; $i < count($this->col_info); $i++ )
                 {
                 $this->console .=  "<td nowrap align=left valign=top><font size=1 color=555599 face=arial>{$this->col_info[$i]->type} {$this->col_info[$i]->max_length}</font><br><span style='font-family: arial; font-size: 10pt; font-weight: bold;'>{$this->col_info[$i]->name}</span></td>";
                 }

                 $this->console .=  "</tr>";

                 // ======================================================
                 // print main results

             if ( $this->last_result )
             {

                 $i=0;
                 foreach ( $this->get_results(null,ARRAY_N) as $one_row )
                 {
                 $i++;
                 $this->console .=  "<tr bgcolor=ffffff><td bgcolor=eeeeee nowrap align=middle><font size=2 color=555599 face=arial>$i</font></td>";

                     foreach ( $one_row as $item )
                     {
                     $this->console .=  "<td nowrap><font face=arial size=2>$item</font></td>";
                     }

                     $this->console .=  "</tr>";
                 }

             } // if last result
             else
             {
                 $this->console .=  "<tr bgcolor=ffffff><td colspan=".(count($this->col_info)+1)."><font face=arial size=2>No Results</font></td></tr>";
             }

             $this->console .=  "</table>";

             } // if col_info
             else
             {
             $this->console .=  "<font face=arial size=2>No Results</font>";
             }

             $this->console .=  "</blockquote></blockquote>";
             $this->console .=  $this->donation();
             $this->console .=  "<hr noshade color=dddddd size=1>";

             // == TJH ==  more -- to try to make backward compatible with a default param that defaults to echo
             if($this->debug_echo){
             echo $this->console;
             }

             $this->debug_called = true;
         //echo "Something tested";   // == TJH == just some breadcrumbs for testing
         }

         /**********************************************************************
         *  Naughty little function to ask for some remuniration!
         */

         function donation()
         {
             return "<font size=1 face=arial color=000000>If ezSQL has helped <a href=\"https://www.paypal.com/xclick/business=justin%40justinvincent.com&item_name=ezSQL&no_note=1&tax=0\" style=\"color: 0000CC;\">make a donation!?</a> &nbsp;&nbsp;<!--[ go on! you know you want to! ]--></font>";
         }

     }

 ?>

//ez_sql_core_2.1_debughack_0.2alpha.php

 <?php
 // =================================================================
 // == TJH ==  To provide optional return value as opposed to simple echo
 // == TJH ==  of the $db->vardump  and   $db->debug  functions

 // == TJH ==  Helpful for assigning the output to a var for handling in situations like template
 // == TJH ==  engines where you want the debugging output rendered in a particular location.

 // == TJH ==  This latest version 0.2 alpha includes a modification that allows
 // == TJH ==  the original dump and debug behaviours to be maintained by default
 // == TJH ==  and hopefully be backward compatible with previous ezSQL versions 

 // == TJH ==  USAGE:     $ezdump = print_r($db->vardump($result),true);
 // == TJH ==  USAGE:     $ezconsole = print_r($db->console,true);        

 // ===========   n.b. for TBS template engine users  ==============================
 // === TJH ===  This is hacked to enable an ezSQL pop-up debug console    from a TBS template page
 // === TJH ===  The following steps need to be taken:                

 // === TJH ===      (1) Set $db->debug_all = true; // in your .php file
 // === TJH ===           and $db->debug_echo = false; // in your .php file

 // === TJH ===       (2) Add the following javascript to top of your html
 /*
 <ezdebugconsole>
     [onload_1;block=ezdebugconsole;when [var.db.debug_all]=1]
     <SCRIPT LANGUAGE="JavaScript">
     if(self.name == ''){var title = 'Console';}
     else{var title = 'Console_' + self.name;}
     newWindow = window.open("",title.value,"width=550,height=650,resizable,scrollbars=yes");
     newWindow.document.write("<HTML><HEAD><TITLE>ezSQL Debug [var..script_name;htmlconv=js]</TITLE></HEAD><BODY bgcolor=#e8e8e8>");
 //    newWindow.document.write("<b>Debug for [var..script_name;htmlconv=js]</b><BR />");
     newWindow.document.write("<table border=0 width='100%'>");
     newWindow.document.write("[var.ezdebug;htmlconv=js]");
     newWindow.document.write("</body>\n</html>\n");
     </script>
 </ezdebugconsole>
 */    

 // === TJH ===      (3) debug data is called with $db->console
 // === TJH ===          Use something like
 // === TJH ===          $ezdebug = print_r($db->console,true);
 // === TJH ===          to stuff the debug data into a PHP var
 // === TJH ===
 // === TJH ===  n.b. Don't forget to slurp the slug of javascript
 // === TJH ===       at the top of the .html template page
 // === TJH ===       you'll need to hack it if you're going to
 // === TJH ===       use it other than with TBS tempalte engine.
 // === TJH ===
 // === TJH ===  Search this file for "TJH" comments to find changes
 // === TJH ===  You can contact TJH via http://tomhenry.us/
 // =================================================================

     /**********************************************************************
     *  Author: Justin Vincent (jv@jvmultimedia.com)
     *  Web...: http://twitter.com/justinvincent
     *  Name..: ezSQL
     *  Desc..: ezSQL Core module - database abstraction library to make
     *          it very easy to deal with databases.
     *
     */

     /**********************************************************************
     *  ezSQL Constants
     */

     define('EZSQL_VERSION','2.1-console');  // === TJH === added an identifying  flag to the version number
     define('OBJECT','OBJECT',true);
     define('ARRAY_A','ARRAY_A',true);
     define('ARRAY_N','ARRAY_N',true);
     define('EZSQL_CORE_ERROR','ezSQLcore can not be used by itself (it is designed for use by database specific modules).');

     /**********************************************************************
     *  Core class containg common functions to manipulate query result
     *  sets once returned
     */

     class ezSQLcore
     {

         var $trace           = false;  // same as $debug_all
         var $debug_all       = false;  // same as $trace

         // === TJH ===
         var $debug_echo = true;        // == TJH ==  // default now needed for echo of debug function

         var $debug_called    = false;
         var $vardump_called  = false;
         var $show_errors     = true;
         var $num_queries     = 0;
         var $last_query      = null;
         var $last_error      = null;
         var $col_info        = null;
         var $captured_errors = array();

         /**********************************************************************
         *  Constructor
         */

         function ezSQLcore()
         {
         }

         /**********************************************************************
         *  Connect to DB - over-ridden by specific DB class
         */

         function connect()
         {
             die(EZSQL_CORE_ERROR);
         }

         /**********************************************************************
         *  Select DB - over-ridden by specific DB class
         */

         function select()
         {
             die(EZSQL_CORE_ERROR);
         }

         /**********************************************************************
         *  Basic Query    - over-ridden by specific DB class
         */

         function query()
         {
             die(EZSQL_CORE_ERROR);
         }

         /**********************************************************************
         *  Format a string correctly for safe insert - over-ridden by specific
         *  DB class
         */

         function escape()
         {
             die(EZSQL_CORE_ERROR);
         }

         /**********************************************************************
         *  Return database specific system date syntax
         *  i.e. Oracle: SYSDATE Mysql: NOW()
         */

         function sysdate()
         {
             die(EZSQL_CORE_ERROR);
         }

         /**********************************************************************
         *  Print SQL/DB error - over-ridden by specific DB class
         */

         function register_error($err_str)
         {
             // Keep track of last error
             $this->last_error = $err_str;

             // Capture all errors to an error array no matter what happens
             $this->captured_errors[] = array
             (
                 'error_str' => $err_str,
                 'query'     => $this->last_query
             );
         }

         /**********************************************************************
         *  Turn error handling on or off..
         */

         function show_errors()
         {
             $this->show_errors = true;
         }

         function hide_errors()
         {
             $this->show_errors = false;
         }

         /**********************************************************************
         *  Kill cached query results
         */

         function flush()
         {
             // Get rid of these
             $this->last_result = null;
             $this->col_info = null;
             $this->last_query = null;
             $this->from_disk_cache = false;
         }

         /**********************************************************************
         *  Get one variable from the DB - see docs for more detail
         */

         function get_var($query=null,$x=0,$y=0)
         {

             // Log how the function was called
             $this->func_call = "\$db->get_var(\"$query\",$x,$y)";

             // If there is a query then perform it if not then use cached results..
             if ( $query )
             {
                 $this->query($query);
             }

             // Extract var out of cached results based x,y vals
             if ( $this->last_result[$y] )
             {
                 $values = array_values(get_object_vars($this->last_result[$y]));
             }

             // If there is a value return it else return null
             return (isset($values[$x]) && $values[$x]!=='')?$values[$x]:null;
         }

         /**********************************************************************
         *  Get one row from the DB - see docs for more detail
         */

         function get_row($query=null,$output=OBJECT,$y=0)
         {

             // Log how the function was called
             $this->func_call = "\$db->get_row(\"$query\",$output,$y)";

             // If there is a query then perform it if not then use cached results..
             if ( $query )
             {
                 $this->query($query);
             }

             // If the output is an object then return object using the row offset..
             if ( $output == OBJECT )
             {
                 return $this->last_result[$y]?$this->last_result[$y]:null;
             }
             // If the output is an associative array then return row as such..
             elseif ( $output == ARRAY_A )
             {
                 return $this->last_result[$y]?get_object_vars($this->last_result[$y]):null;
             }
             // If the output is an numerical array then return row as such..
             elseif ( $output == ARRAY_N )
             {
                 return $this->last_result[$y]?array_values(get_object_vars($this->last_result[$y])):null;
             }
             // If invalid output type was specified..
             else
             {
                 $this->print_error(" \$db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N");
             }

         }

         /**********************************************************************
         *  Function to get 1 column from the cached result set based in X index
         *  see docs for usage and info
         */

         function get_col($query=null,$x=0)
         {

             // If there is a query then perform it if not then use cached results..
             if ( $query )
             {
                 $this->query($query);
             }

             // Extract the column values
             for ( $i=0; $i < count($this->last_result); $i++ )
             {
                 $new_array[$i] = $this->get_var(null,$x,$i);
             }

             return $new_array;
         }

         /**********************************************************************
         *  Return the the query as a result set - see docs for more details
         */

         function get_results($query=null, $output = OBJECT)
         {

             // Log how the function was called
             $this->func_call = "\$db->get_results(\"$query\", $output)";

             // If there is a query then perform it if not then use cached results..
             if ( $query )
             {
                 $this->query($query);
             }

             // Send back array of objects. Each row is an object
             if ( $output == OBJECT )
             {
                 return $this->last_result;
             }
             elseif ( $output == ARRAY_A || $output == ARRAY_N )
             {
                 if ( $this->last_result )
                 {
                     $i=0;
                     foreach( $this->last_result as $row )
                     {

                         $new_array[$i] = get_object_vars($row);

                         if ( $output == ARRAY_N )
                         {
                             $new_array[$i] = array_values($new_array[$i]);
                         }

                         $i++;
                     }

                     return $new_array;
                 }
                 else
                 {
                     return array();
                 }
             }
         }

         /**********************************************************************
         *  Function to get column meta data info pertaining to the last query
         * see docs for more info and usage
         */

         function get_col_info($info_type="name",$col_offset=-1)
         {

             if ( $this->col_info )
             {
                 if ( $col_offset == -1 )
                 {
                     $i=0;
                     foreach($this->col_info as $col )
                     {
                         $new_array[$i] = $col->{$info_type};
                         $i++;
                     }
                     return $new_array;
                 }
                 else
                 {
                     return $this->col_info[$col_offset]->{$info_type};
                 }

             }

         }

         /**********************************************************************
         *  Dumps the contents of any input variable to screen in a nicely
         *  formatted and easy to understand way - any type: Object, Var or Array
         */
         // === TJH ===  This is hacked to OPTIONALLY generate a "$return_var"
         // === TJH ===   must also set $db->debug_echo = false; in your script to override default behaviour
         // === TJH ===   instead of a simple "echo" to the current screen (DEFAULT)
         // === TJH ===    USAGE:     $ezdebug = print_r($db->vardump($result),true);
         function vardump($mixed='')
         {
             $return_var .=   "<p><table><tr><td bgcolor=ffffff><blockquote><font color=000090>";
             $return_var .=   "<pre><font face=arial>";

             if ( ! $this->vardump_called )
             {
                 $return_var .=   "<font color=800080><b>ezSQL</b> (v".EZSQL_VERSION.") <b>Variable Dump..</b></font>\n\n";
             }

             $var_type = gettype ($mixed);
             $return_var .=  print_r(($mixed?$mixed:"<font color=red>No Value / False</font>"),true);
             $return_var .=   "\n\n<b>Type:</b> " . ucfirst($var_type) . "\n";
             $return_var .=   "<b>Last Query</b> [$this->num_queries]<b>:</b> ".($this->last_query?$this->last_query:"NULL")."\n";
             $return_var .=   "<b>Last Function Call:</b> " . ($this->func_call?$this->func_call:"None")."\n";
             $return_var .=   "<b>Last Rows Returned:</b> ".count($this->last_result)."\n";
             $return_var .=   "</font></pre></font></blockquote></td></tr></table>".$this->donation();
             $return_var .=   "\n<hr size=1 noshade color=dddddd>";

             $this->vardump_called = true;

             if($this->debug_echo){
             echo $return_var;
             }

             return $return_var;
         }

         /**********************************************************************
         *  Alias for the above function
         */

         function dumpvar($mixed)
         {
             $this->vardump($mixed);
         }

         /**********************************************************************
         *  Displays the last query string that was sent to the database & a
         * table listing results (if there were any).
         * (abstracted into a seperate file to save server overhead).
         */

         // === TJH ===  The debug() function is now hacked to OPTIOANLLY create a return result
         // === TJH ===  that can be called as a variable, just changed all "echo"s to "$this->console .= "
         // === TJH ===  this is accessed with "$db->console" obviously
         // === TJH ===  n.b. you must also set $db->debug_echo = false; to override default behaviour        

         function debug($debug_echo)     // === TJH ===   set a default for function to be able to switch "echo" on/off
         {

             //$this->console .=  "<blockquote>"; // === TJH == commented out to change output formatting slightly

             // Only show ezSQL credits once..
             if ( ! $this->debug_called )
             {
                 $this->console .=  "<font color=800080 face=arial size=2><b>ezSQL</b> (v".EZSQL_VERSION.") <b>Debug..</b></font><p>\n";
             }

             if ( $this->last_error )
             {
                 $this->console .=  "<font face=arial size=2 color=000099><b>Last Error --</b> [<font color=000000><b>$this->last_error</b></font>]<p>";
             }

             if ( $this->from_disk_cache )
             {
                 $this->console .=  "<font face=arial size=2 color=000099><b>Results retrieved from disk cache</b></font><p>";
             }

             $this->console .=  "<font face=arial size=2 color=000099><b>Query</b> [$this->num_queries] <b>--</b> ";
             $this->console .=  "[<font color=000000><b>$this->last_query</b></font>]</font><p>";

             $this->console .=  "<font face=arial size=2 color=000099><b>Query Result..</b></font>";
             $this->console .=  "<blockquote>";

             if ( $this->col_info )
             {

                 // =====================================================
                 // Results top rows

                 $this->console .=  "<table cellpadding=5 cellspacing=1 bgcolor=555555>";
                 $this->console .=  "<tr bgcolor=eeeeee><td nowrap valign=bottom><font color=555599 face=arial size=2><b>(row)</b></font></td>";

                 for ( $i=0; $i < count($this->col_info); $i++ )
                 {
                 $this->console .=  "<td nowrap align=left valign=top><font size=1 color=555599 face=arial>{$this->col_info[$i]->type} {$this->col_info[$i]->max_length}</font><br><span style='font-family: arial; font-size: 10pt; font-weight: bold;'>{$this->col_info[$i]->name}</span></td>";
                 }

                 $this->console .=  "</tr>";

                 // ======================================================
                 // print main results

             if ( $this->last_result )
             {

                 $i=0;
                 foreach ( $this->get_results(null,ARRAY_N) as $one_row )
                 {
                 $i++;
                 $this->console .=  "<tr bgcolor=ffffff><td bgcolor=eeeeee nowrap align=middle><font size=2 color=555599 face=arial>$i</font></td>";

                     foreach ( $one_row as $item )
                     {
                     $this->console .=  "<td nowrap><font face=arial size=2>$item</font></td>";
                     }

                     $this->console .=  "</tr>";
                 }

             } // if last result
             else
             {
                 $this->console .=  "<tr bgcolor=ffffff><td colspan=".(count($this->col_info)+1)."><font face=arial size=2>No Results</font></td></tr>";
             }

             $this->console .=  "</table>";

             } // if col_info
             else
             {
             $this->console .=  "<font face=arial size=2>No Results</font>";
             }

             $this->console .=  "</blockquote></blockquote>";
             $this->console .=  $this->donation();
             $this->console .=  "<hr noshade color=dddddd size=1>";

             // == TJH ==  more -- to try to make backward compatible with a default param that defaults to echo
             if($this->debug_echo){
             echo $this->console;
             }

             $this->debug_called = true;
         //echo "Something tested";   // == TJH == just some breadcrumbs for testing
         }

         /**********************************************************************
         *  Naughty little function to ask for some remuniration!
         */

         function donation()
         {
             return "<font size=1 face=arial color=000000>If ezSQL has helped <a href=\"https://www.paypal.com/xclick/business=justin%40justinvincent.com&item_name=ezSQL&no_note=1&tax=0\" style=\"color: 0000CC;\">make a donation!?</a> &nbsp;&nbsp;<!--[ go on! you know you want to! ]--></font>";
         }

     }

 ?>

readme_debughack_0.2alpha.txt

// =================================================================
// =================================================================
// == TJH == ezSQL Debug Console version 0.2-alpha ===============================
// =================================================================
// =================================================================
// == TJH == To provide optional return value as opposed to simple echo
// == TJH == of the $db->vardump and $db->debug functions

// == TJH == Helpful for assigning the output to a var for handling in situations like template
// == TJH == engines where you want the debugging output rendered in a particular location.

// == TJH == This latest version 0.2 alpha includes a modification that allows
// == TJH == the original dump and debug behaviours to be maintained by default
// == TJH == and hopefully be backward compatible with previous ezSQL versions

// == TJH == n.b. set $db->debug_all = true; // in your .php file
// == TJH == and $db->debug_echo = false; // in your .php file

// == TJH == USAGE: $ezdump = print_r($db->vardump($result),true);
// == TJH == USAGE: $ezdebug = print_r($db->console,true);
// =================================================================
// =================================================================

// =================================================================
// =========== n.b. for TBS template engine users ==============================
// === TJH === This is hacked to enable an ezSQL pop-up debug console from a TBS template page
// === TJH === The following steps need to be taken:

// === TJH === (1) Set $db->debug_all = true; // in your .php file
// === TJH === and $db->debug_echo = false; // in your .php file

// === TJH === (2) Add the following javascript to top of your html
/*
<ezdebugconsole>
[onload_1;block=ezdebugconsole;when [var.db.debug_all]=1]
<SCRIPT LANGUAGE="JavaScript">
if(self.name == ''){var title = 'Console';}
else{var title = 'Console_' + self.name;}
newWindow = window.open("",title.value,"width=550,height=650,resizable,scrollbars=yes");
newWindow.document.write("<HTML><HEAD><TITLE>ezSQL Debug [var..script_name;htmlconv=js]</TITLE></HEAD><BODY bgcolor=#e8e8e8>");
// newWindow.document.write("<b>Debug for [var..script_name;htmlconv=js]</b><BR />");
newWindow.document.write("<table border=0 width='100%'>");
newWindow.document.write("[var.ezdebug;htmlconv=js]");
newWindow.document.write("</body>\n</html>\n");
</script>
</ezdebugconsole>
*/

// === TJH === (3) debug data is called with $db->console
// === TJH === Use something like
// === TJH === $ezdebug = print_r($db->console,true);
// === TJH === to stuff the debug data into a PHP var
// === TJH ===
// === TJH === n.b. Don't forget to slurp the slug of javascript
// === TJH === at the top of the .html template page
// === TJH === you'll need to hack it if you're going to
// === TJH === use it other than with TBS tempalte engine.
// === TJH ===
// === TJH === Search this file for "TJH" comments to find changes
// === TJH === You can contact TJH via http://tomhenry.us/
// =================================================================