php-sql-parser sql防注入脚本
<?php /**
* SQL Parser from: http://code.google.com/p/php-sql-parser/
* License: New BSD
*/
class PHPSQLParser
{
var $reserved = array();
var $functions = array();
function __construct($sql = false) {
#LOAD THE LIST OF RESERVED WORDS
$this->load_reserved_words();
if($sql) $this->parse($sql);
} function parse($sql) {
$sql = trim($sql); #lex the SQL statement
$in = $this->split_sql($sql); #sometimes the parser needs to skip ahead until a particular
#token is found
$skip_until = false; #this is the output tree which is being parsed
$out = array(); #This is the last type of union used (UNION or UNION ALL)
#indicates a) presence of at least one union in this query
# b) the type of union if this is the first or last query
$union = false; #Sometimes a "query" consists of more than one query (like a UNION query)
#this array holds all the queries
$queries=array(); #This is the highest level lexical analysis. This is the part of the
#code which finds UNION and UNION ALL query parts
foreach($in as $key => $token) {
$token=trim($token); if($skip_until) {
if($token) {
if(strtoupper($token) == $skip_until) {
$skip_until = false;
continue;
}
} else {
continue;
}
} if(strtoupper($token) == "UNION") {
$union = 'UNION';
for($i=$key+1;$i<count($in);++$i) {
if(trim($in[$i]) == '') continue;
if(strtoupper($in[$i]) == 'ALL') {
$skip_until = 'ALL';
$union = 'UNION ALL';
continue ;
} else {
break;
}
} $queries[$union][] = $out;
$out = array(); } else {
$out[]=$token;
} } if(!empty($out)) {
if ($union) {
$queries[$union][] = $out;
} else {
$queries[] = $out;
}
} /*MySQL supports a special form of UNION:
(select ...)
union
(select ...) This block handles this query syntax. Only one such subquery
is supported in each UNION block. (select)(select)union(select) is not legal.
The extra queries will be silently ignored.
*/
$union_types = array('UNION','UNION ALL');
foreach($union_types as $union_type) {
if(!empty($queries[$union_type])) {
foreach($queries[$union_type] as $i => $tok_list) {
foreach($tok_list as $z => $tok) {
$tok = trim($tok);
if(!$tok) continue;
if(preg_match('/^\\(\\s*select\\s*/i', $tok)) {
$queries[$union_type][$i] = $this->parse(substr($tok,1,-1));
break;
} else {
$queries[$union_type][$i] = $this->process_sql($queries[$union_type][$i]);
break;
}
}
}
}
} /* If there was no UNION or UNION ALL in the query, then the query is
stored at $queries[0].
*/
if(!empty($queries[0])) {
$queries[0] = $this->process_sql($queries[0]); } if(count($queries) == 1 && !$union) {
$queries = $queries[0];
} $this->parsed = $queries;
return $this->parsed;
} #This function counts open and close parenthesis and
#returns their location. This might be faster as a regex
private function count_paren($token,$chars=array('(',')')) {
$len = strlen($token);
$open=array();
$close=array();
for($i=0;$i<$len;++$i){
if($token[$i] == $chars[0]) {
$open[] = $i;
} elseif($token[$i] == $chars[1]) {
$close[] = $i;
} }
return array('open' => $open, 'close' => $close, 'balanced' =>( count($close) - count($open)));
} #This function counts open and close parenthesis and
#returns their location. This might be faster as a regex
private function count_backtick($token) {
$len = strlen($token);
$cnt=0;
for($i=0;$i<$len;++$i){
if($token[$i] == '`') ++$cnt;
}
return $cnt;
} #This is the lexer
#this function splits up a SQL statement into easy to "parse"
#tokens for the SQL processor
private function split_sql($sql) { if(!is_string($sql)) {
return false;
} $sql = str_replace(array('\\\'','\\"',"\r\n","\n","()"),array("''",'""'," "," "," "), $sql);
$regex=<<<EOREGEX
/(`(?:[^`]|``)`|[@A-Za-z0-9_.`-]+(?:\(\s*\)){0,1})
|(\+|-|\*|\/|!=|>=|<=|<>|>|<|&&|\|\||=|\^)
|(\(.*?\)) # Match FUNCTION(...) OR BAREWORDS
|('(?:[^']|'')*'+)
|("(?:[^"]|"")*"+)
|([^ ,]+)
/ix
EOREGEX
; $tokens = preg_split($regex, $sql,-1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
$token_count = count($tokens); /* The above regex has one problem, because the parenthetical match is not greedy.
Thus, when matching grouped expressions such as ( (a and b) or c) the
tokenizer will produce "( (a and b)", " ", "or", " " , "c,")" This block detects the number of open/close parentheses in the given token. If the parentheses are balanced
(balanced == 0) then we don't need to do anything. otherwise, we need to balance the expression.
*/
$reset = false;
for($i=0;$i<$token_count;++$i) { if(empty($tokens[$i])) continue; $token = $tokens[$i];
$trim = trim($token);
if($trim) {
if($trim[0] != '('
&& substr($trim,-1) == ')') {
$trim=trim(substr($trim,0,
strpos($trim,'(')));
}
$tokens[$i]=$trim;
$token=$trim;
} if($token && $token[0] == '(') {
$info = $this->count_paren($token);
if($info['balanced'] == 0) {
continue;
} // We need to find this many closing parentheses.
$needed = abs($info['balanced']);
$n = $i;
while($needed > 0 && $n <$token_count-1) {
++$n;
#echo "LOOKING FORWARD TO $n [ " . $tokens[$n] . "]\n";
$token2 = $tokens[$n];
$info2 = $this->count_paren($token2);
$closes = count($info2['close']);
if($closes != $needed) {
$tokens[$i] .= $tokens[$n];
unset($tokens[$n]);
$reset = true;
$info2 = $this->count_paren($tokens[$i]);
$needed = abs($info2['balanced']);
# echo "CLOSES LESS THAN NEEDED (still need $needed)\n";
} else {
/*get the string pos of the last close parenthesis we need*/
$pos = $info2['close'][count($info2['close'])-1];
$str1 = $str2 = "";
if($pos == 0) {
$str1 = ')';
} else {
$str1 = substr($tokens[$n],0,$pos) . ')';
$str2 = substr($tokens[$n],$pos+1);
}
#echo "CLOSES FOUND AT $n, offset:$pos [$str1] [$str2]\n";
if(strlen($str2) > 0) {
$tokens[$n] = $str2;
} else {
unset($tokens[$n]);
$reset = true;
}
$tokens[$i] .= $str1;
$info2 = $this->count_paren($tokens[$i]);
$needed = abs($info2['balanced']); }
}
}
} #the same problem appears with backticks :( /* reset the array if we deleted any tokens above */
if ($reset) $tokens = array_values($tokens); $token_count=count($tokens);
for($i=0;$i<$token_count;++$i) {
if(empty($tokens[$i])) continue;
$token=$tokens[$i];
$needed=true;
$reset=false;
if($needed && $token && strpos($token,'`') !== false) {
$info = $this->count_backtick($token);
if($info %2 == 0) { #even number of backticks means we are balanced
continue;
}
$needed=1; $n = $i;
while($needed && $n <$token_count-1) {
$reset=true;
#echo "BACKTICK COUNT[$i]: $info old: {$tokens[$i]}, new: ($token)\n";
++$n;
$token .= $tokens[$n];
unset($tokens[$n]);
$needed = $this->count_backtick($token) % 2;
}
}
if($reset) $tokens[$i] = $token; }
/* reset the array if we deleted any tokens above */
$tokens = array_values($tokens); return $tokens; } /* This function breaks up the SQL statement into logical sections.
Some sections are then further handled by specialized functions.
*/
private function process_sql(&$tokens,$start_at = 0, $stop_at = false) {
$prev_category = "";
$start = microtime(true);
$token_category = ""; $skip_next=false;
$token_count = count($tokens); if(!$stop_at) {
$stop_at = $token_count;
} $out = false; for($token_number = $start_at;$token_number<$stop_at;++$token_number) {
$token = trim($tokens[$token_number]);
if($token && $token[0] == '(' && $token_category == "") {
$token_category = 'SELECT';
} /* If it isn't obvious, when $skip_next is set, then we ignore the next real
token, that is we ignore whitespace.
*/
if($skip_next) {
#whitespace does not count as a next token
if($token == "") {
continue;
} #to skip the token we replace it with whitespace
$new_token = "";
$skip_next = false;
} $upper = strtoupper($token);
switch($upper) { /* Tokens that get their own sections. These keywords have subclauses. */
case 'SELECT':
case 'ORDER':
case 'LIMIT':
case 'SET':
case 'DUPLICATE':
case 'VALUES':
case 'GROUP':
case 'ORDER':
case 'HAVING':
case 'INTO':
case 'WHERE':
case 'RENAME':
case 'CALL':
case 'PROCEDURE':
case 'FUNCTION':
case 'DATABASE':
case 'SERVER':
case 'LOGFILE':
case 'DEFINER':
case 'RETURNS':
case 'EVENT':
case 'TABLESPACE':
case 'VIEW':
case 'TRIGGER':
case 'DATA':
case 'DO':
case 'PASSWORD':
case 'USER':
case 'PLUGIN':
case 'FROM':
case 'FLUSH':
case 'KILL':
case 'RESET':
case 'START':
case 'STOP':
case 'PURGE':
case 'EXECUTE':
case 'PREPARE':
case 'DEALLOCATE':
if($token == 'DEALLOCATE') {
$skip_next = true;
}
/* this FROM is different from FROM in other DML (not join related) */
if($token_category == 'PREPARE' && $upper == 'FROM') {
continue 2;
} $token_category = $upper;
#$join_type = 'JOIN';
if($upper == 'FROM' && $token_category == 'FROM') {
/* DO NOTHING*/
} else {
continue 2; }
break; /* These tokens get their own section, but have no subclauses.
These tokens identify the statement but have no specific subclauses of their own. */
case 'DELETE':
case 'ALTER':
case 'INSERT':
case 'REPLACE':
case 'TRUNCATE':
case 'CREATE':
case 'TRUNCATE':
case 'OPTIMIZE':
case 'GRANT':
case 'REVOKE':
case 'SHOW':
case 'HANDLER':
case 'LOAD':
case 'ROLLBACK':
case 'SAVEPOINT':
case 'UNLOCK':
case 'INSTALL':
case 'UNINSTALL':
case 'ANALZYE':
case 'BACKUP':
case 'CHECK':
case 'CHECKSUM':
case 'REPAIR':
case 'RESTORE':
case 'CACHE':
case 'DESCRIBE':
case 'EXPLAIN':
case 'USE':
case 'HELP':
$token_category = $upper; /* set the category in case these get subclauses
in a future version of MySQL */
$out[$upper][0] = $upper;
continue 2;
break; /* This is either LOCK TABLES or SELECT ... LOCK IN SHARE MODE*/
case 'LOCK':
if($token_category == "") {
$token_category = $upper;
$out[$upper][0] = $upper;
} else {
$token = 'LOCK IN SHARE MODE';
$skip_next=true;
$out['OPTIONS'][] = $token;
}
continue 2;
break; case 'USING':
/* USING in FROM clause is different from USING w/ prepared statement*/
if($token_category == 'EXECUTE') {
$token_category=$upper;
continue 2;
}
if($token_category == 'FROM' && !empty($out['DELETE'])) {
$token_category=$upper;
continue 2;
}
break; /* DROP TABLE is different from ALTER TABLE DROP ... */
case 'DROP':
if($token_category != 'ALTER') {
$token_category = $upper;
$out[$upper][0] = $upper;
continue 2;
}
break; case 'FOR':
$skip_next=true;
$out['OPTIONS'][] = 'FOR UPDATE';
continue 2;
break; case 'UPDATE':
if($token_category == "" ) {
$token_category = $upper;
continue 2; }
if($token_category == 'DUPLICATE') {
continue 2;
}
break;
break; case 'START':
$token = "BEGIN";
$out[$upper][0] = $upper;
$skip_next = true;
break; /* These tokens are ignored. */
case 'BY':
case 'ALL':
case 'SHARE':
case 'MODE':
case 'TO': case ';':
continue 2;
break; case 'KEY':
if($token_category == 'DUPLICATE') {
continue 2;
}
break; /* These tokens set particular options for the statement. They never stand alone.*/
case 'DISTINCTROW':
$token='DISTINCT';
case 'DISTINCT':
case 'HIGH_PRIORITY':
case 'LOW_PRIORITY':
case 'DELAYED':
case 'IGNORE':
case 'FORCE':
case 'STRAIGHT_JOIN':
case 'SQL_SMALL_RESULT':
case 'SQL_BIG_RESULT':
case 'QUICK':
case 'SQL_BUFFER_RESULT':
case 'SQL_CACHE':
case 'SQL_NO_CACHE':
case 'SQL_CALC_FOUND_ROWS':
$out['OPTIONS'][] = $upper;
continue 2;
break; case 'WITH':
if($token_category == 'GROUP') {
$skip_next=true;
$out['OPTIONS'][] = 'WITH ROLLUP';
continue 2;
}
break; case 'AS':
break; case '':
case ',':
case ';':
break; default:
break;
} if($prev_category == $token_category) {
$out[$token_category][] = $token;
} $prev_category = $token_category;
} if(!$out) return false; #process the SELECT clause
if(!empty($out['SELECT'])) $out['SELECT'] = $this->process_select($out['SELECT']); if(!empty($out['FROM'])) $out['FROM'] = $this->process_from($out['FROM']);
if(!empty($out['USING'])) $out['USING'] = $this->process_from($out['USING']);
if(!empty($out['UPDATE'])) $out['UPDATE'] = $this->process_from($out['UPDATE']); if(!empty($out['GROUP'])) $out['GROUP'] = $this->process_group($out['GROUP'], $out['SELECT']);
if(!empty($out['ORDER'])) $out['ORDER'] = $this->process_group($out['ORDER'], $out['SELECT']); if(!empty($out['LIMIT'])) $out['LIMIT'] = $this->process_limit($out['LIMIT']); if(!empty($out['WHERE'])) $out['WHERE'] = $this->process_expr_list($out['WHERE']);
if(!empty($out['HAVING'])) $out['HAVING'] = $this->process_expr_list($out['HAVING']);
if(!empty($out['SET'])) $out['SET'] = $this->process_set_list($out['SET']);
if(!empty($out['DUPLICATE'])) {
$out['ON DUPLICATE KEY UPDATE'] = $this->process_set_list($out['DUPLICATE']);
unset($out['DUPLICATE']);
}
if(!empty($out['INSERT'])) $out = $this->process_insert($out);
if(!empty($out['REPLACE'])) $out = $this->process_insert($out,'REPLACE');
if(!empty($out['DELETE'])) $out = $this->process_delete($out); return $out; } /* A SET list is simply a list of key = value expressions separated by comma (,).
This function produces a list of the key/value expressions.
*/
private function process_set_list($tokens) {
$column="";
$expression="";
foreach($tokens as $token) {
$token=trim($token);
if(!$column) {
if($token === false || empty($token)) continue;
$column .= $token;
continue;
} if($token == '=') continue; if($token == ',') {
$expr[] = array('column' => trim($column), 'expr' => trim($expression));
$expression = $column = "";
continue;
} $expression .= $token;
}
if($expression) {
$expr[] = array('column' => trim($column), 'expr' => trim($expression));
} return $expr;
} /* This function processes the LIMIT section.
start,end are set. If only end is provided in the query
then start is set to 0.
*/
private function process_limit($tokens) {
$start = 0;
$end = 0; if($pos = array_search(',',$tokens)) {
for($i=0;$i<$pos;++$i) {
if($tokens[$i] != '') {
$start = $tokens[$i];
break;
}
}
$pos = $pos + 1; } else {
$pos = 0;
} for($i=$pos;$i<count($tokens);++$i) {
if($tokens[$i] != '') {
$end = $tokens[$i];
break;
}
} return array('start' => $start, 'end' => $end);
} /* This function processes the SELECT section. It splits the clauses at the commas.
Each clause is then processed by process_select_expr() and the results are added to
the expression list. Finally, at the end, the expression list is returned.
*/
private function process_select(&$tokens) {
$expression = "";
$expr = array();
foreach($tokens as $token) {
if($token == ',') {
$expr[] = $this->process_select_expr(trim($expression));
$expression = "";
} else {
if($token === "" || $token===false) $token=" ";
$expression .= $token ;
}
}
$expression = trim($expression);
if($expression) $expr[] = $this->process_select_expr($expression);
return $expr;
} /* This function processes each SELECT clause. We determine what (if any) alias
is provided, and we set the type of expression.
*/
private function process_select_expr($expression) { if (empty($expression)){
return '';
} $capture = false;
$alias = "";
$base_expression = $expression;
$upper = trim(strtoupper($expression));
#if necessary, unpack the expression
if($upper[0] == '(') {
#$expression = substr($expression,1,-1);
$base_expression = $expression;
} $tokens = $this->split_sql($expression);
$token_count = count($tokens); /* Determine if there is an explicit alias after the AS clause.
If AS is found, then the next non-whitespace token is captured as the alias.
The tokens after (and including) the AS are removed.
*/
$base_expr = "";
$stripped=array();
$capture=false;
$alias = "";
$processed=false;
for($i=0;$i<$token_count;++$i) {
$token = strtoupper($tokens[$i]);
if(trim($token)) {
$stripped[] = $tokens[$i];
} if($token == 'AS') {
unset($tokens[$i]);
$capture = true;
continue;
} if($capture) {
if(trim($token)) {
$alias .= $tokens[$i];
}
unset($tokens[$i]);
continue;
}
$base_expr .= $tokens[$i];
} $stripped = $this->process_expr_list($stripped);
$last = array_pop($stripped);
if(!$alias && $last['expr_type'] == 'colref') {
$prev = array_pop($stripped);
if($prev['expr_type'] == 'operator' ||
$prev['expr_type'] == 'const' ||
$prev['expr_type'] == 'function' ||
$prev['expr_type'] == 'expression' ||
#$prev['expr_type'] == 'aggregate_function' ||
$prev['expr_type'] == 'subquery' ||
$prev['expr_type'] == 'colref') {
$alias = $last['base_expr']; #remove the last token
array_pop($tokens); $base_expr = join("", $tokens); }
} if(!$alias) {
$base_expr=join("", $tokens);
$alias = $base_expr;
} /* Properly escape the alias if it is not escaped */
if ($alias[0] != '`') {
$alias = '`' . str_replace('`','``',$alias) . '`';
}
$processed = false;
$type='expression'; if(substr(trim($base_expr),0,1) == '(') {
$base_expr = substr($expression,1,-1);
if(preg_match('/^sel/i', $base_expr)) {
$type='subquery';
$processed = $this->parse($base_expr);
}
}
if(!$processed) {
$processed = $this->process_expr_list($tokens);
} if(count($processed) == 1) {
$type = $processed[0]['expr_type'];
$processed = false;
} return array('expr_type'=>$type,'alias' => $alias, 'base_expr' => $base_expr, 'sub_tree' => $processed); } private function trimSubquery($sq)
{
$sq = trim($sq);
if(empty($sq)) return '';
while($sq[0] == '(' && substr($sq, -1) == ')') {
$sq = substr($sq, 1, -1);
}
return $sq;
} private function process_from(&$tokens) { $expression = "";
$expr = array();
$token_count=0;
$table = "";
$alias = ""; $skip_next=false;
$i=0;
$join_type = '';
$ref_type="";
$ref_expr="";
$base_expr="";
$sub_tree = false;
$subquery = ""; $first_join=true;
$modifier="";
$saved_join_type=""; foreach($tokens as $token) {
$base_expr = false;
$upper = strtoupper(trim($token)); if($skip_next && $token) {
$token_count++;
$skip_next = false;
continue;
} else {
if($skip_next) {
continue;
}
} if(preg_match("/^\\s*\\(\\s*select/i",$token)) {
$type = 'subquery';
$table = "DEPENDENT-SUBQUERY";
$sub_tree = $this->parse($this->trimSubquery($token));
$subquery = $token;
} switch($upper) {
case 'OUTER':
case 'LEFT':
case 'RIGHT':
case 'NATURAL':
case 'CROSS':
case ',':
case 'JOIN':
break; default:
$expression .= $token == '' ? " " : $token;
if($ref_type) {
$ref_expr .= $token == '' ? " " : $token;
}
break;
} switch($upper) {
case 'AS':
$token_count++;
$n=1;
$alias = "";
while($alias == "") {
$alias = trim($tokens[$i+$n]);
++$n;
} continue;
break; case 'INDEX':
if($token_category == 'CREATE') {
$token_category = $upper;
continue 2;
} break; case 'USING':
case 'ON':
$ref_type = $upper;
$ref_expr = ""; case 'CROSS':
case 'USE':
case 'FORCE':
case 'IGNORE':
case 'INNER':
case 'OUTER':
# $expression .= $token;
$token_count++;
continue;
break; case 'FOR':
$token_count++;
$skip_next = true;
continue;
break; case 'LEFT':
case 'RIGHT':
case 'STRAIGHT_JOIN':
$join_type=$saved_join_type; $modifier = $upper . " ";
break; case ',':
$modifier = 'CROSS'; case 'JOIN': if($first_join) {
$join_type = 'JOIN';
$saved_join_type = ($modifier ? $modifier : 'JOIN');
} else {
$new_join_type = ($modifier ? $modifier : 'JOIN');
$join_type = $saved_join_type;
$saved_join_type = $new_join_type;
unset($new_join_type);
} $first_join = false; if(!trim($alias)) $alias = $table; if($subquery) {
$sub_tree = $this->parse(trim($subquery,'()'));
$base_expr=$subquery;
} if(substr(trim($table),0,1) == '(') {
$base_expr=$this->trimSubquery($table);
$join_type = 'JOIN';
$sub_tree = $this->process_from($this->split_sql($base_expr));
$alias="";
} if($join_type == "") $join_type='JOIN';
$expr[] = array('table'=>$table, 'alias'=>$alias,'join_type'=>$join_type,'ref_type'=> $ref_type,'ref_clause'=>$this->trimSubquery($ref_expr), 'base_expr' => $base_expr, 'sub_tree' => $sub_tree);
$modifier = "";
#$join_type=$saved_join_type; $token_count = 0;
$table = $alias = $expression = $base_expr = $ref_type = $ref_expr = "";
$sub_tree=false;
$subquery = ""; break; default:
if($token === false || empty($token) || $token === "") continue; if($token_count == 0 ) {
if(!$table) {
$table = $token ;
}
} else if($token_count == 1) {
$alias = $token;
}
$token_count++;
break;
}
++$i;
}
if(substr(trim($table),0,1) == '(') {
$base_expr=$this->trimSubquery($table);
$join_type = 'JOIN';
$sub_tree = $this->process_from($this->split_sql($base_expr));
$alias = "";
} else {
if(!trim($alias)) $alias = $table;
}
if($join_type == "") $saved_join_type='JOIN'; $expr[] = array('table'=>$table, 'alias'=>$alias,'join_type'=>$saved_join_type,'ref_type'=> $ref_type,'ref_clause'=> $this->trimSubquery($ref_expr), 'base_expr' => $base_expr, 'sub_tree' => $sub_tree); return $expr;
} private function process_group(&$tokens, &$select) { $out=array();
$expression = "";
$direction="ASC";
$type = "expression";
if(!$tokens) return false; foreach($tokens as $token) {
switch(strtoupper($token)) {
case ',':
$expression = trim($expression);
if($expression[0] != '`' || substr($expression,-1) != '`') {
$escaped = str_replace('`','``',$expression);
} else {
$escaped = $expression;
}
$escaped = '`' . $escaped . '`'; if(is_numeric(trim($expression))) {
$type = 'pos';
} else { #search to see if the expression matches an alias
foreach($select as $clause) {
if($clause['alias'] == $escaped) {
$type = 'alias';
}
} if(!$type) $type = "expression";
} $out[]=array('type'=>$type,'base_expr'=>$expression,'direction'=>$direction);
$escaped = "";
$expression = "";
$direction = "ASC";
$type = "";
break; case 'ASC':
$direction = "ASC";
break;
case 'DESC':
$direction = "DESC";
break; default:
$expression .= $token == '' ? ' ' : $token; }
}
if($expression) {
$expression = trim($expression);
if($expression[0] != '`' || substr($expression,-1) != '`') {
$escaped = str_replace('`','``',$expression);
} else {
$escaped = $expression;
}
$escaped = '`' . $escaped . '`'; if(is_numeric(trim($expression))) {
$type = 'pos';
} else { #search to see if the expression matches an alias
if(!$type && $select) {
foreach($select as $clause) {
if(!is_array($clause)) continue;
if($clause['alias'] == $escaped) {
$type = 'alias';
}
}
} else {
$type="expression";
} if(!$type) $type = "expression";
} $out[]=array('type'=>$type,'base_expr'=>$expression,'direction'=>$direction);
}
foreach($out as &$term) {
if(!empty($term['base_expr'])) {
$term['sub_tree'] = array($this->process_select_expr($term['base_expr']));
}
} return $out;
} /* Some sections are just lists of expressions, like the WHERE and HAVING clauses. This function
processes these sections. Recursive.
*/
private function process_expr_list($tokens) {
$expr = "";
$type = "";
$prev_token = "";
$skip_next = false;
$sub_expr = ""; $in_lists = array();
foreach($tokens as $key => $token) { if(strlen(trim($token))==0) continue;
if($skip_next) {
$skip_next = false;
continue;
} $processed = false;
$upper = strtoupper(trim($token));
if(trim($token)) $token=trim($token); /* is it a subquery?*/
if(preg_match("/^\\s*\\(\\s*SELECT/i", $token)) {
$type = 'subquery';
#tokenize and parse the subquery.
#we remove the enclosing parenthesis for the tokenizer
$processed = $this->parse($this->trimSubquery($token)); /* is it an inlist */
} elseif( $upper[0] == '(' && substr($upper,-1) == ')' ) {
if($prev_token == 'IN') {
$type = "in-list";
$processed = $this->split_sql(substr($token,1,-1));
$list = array();
foreach($processed as $v) {
if($v == ',') continue;
$list[]=$v;
}
$processed = $list;
unset($list);
$prev_token = ""; }
elseif($prev_token == 'AGAINST') {
$type = "match-arguments";
$list = $this->split_sql(substr($token,1,-1));
if(count($list) > 1){
$match_mode = implode('',array_slice($list,1));
$processed = array($list[0], $match_mode);
}
else
$processed = $list[0];
$prev_token = "";
} /* it is either an operator, a colref or a constant */
} else {
switch($upper) {
case 'AND':
case '&&':
case 'BETWEEN':
case 'AND':
case 'BINARY':
case '&':
case '~':
case '|':
case '^':
case 'CASE':
case 'WHEN':
case 'END':
case 'DIV':
case '/':
case '<=>':
case '=':
case '>=':
case '>':
case 'IS':
case 'NOT':
case 'NULL':
case '<<':
case '<=':
case '<':
case 'LIKE':
case '-':
case '%':
case '!=':
case '<>':
case 'REGEXP':
case '!':
case '||':
case 'OR':
case '+':
case '>>':
case 'RLIKE':
case 'SOUNDS':
case '*':
case '-':
case 'XOR':
case 'IN':
$processed = false;
$type = "operator";
break;
default:
switch($token[0]) {
case "'":
case '"':
$type = 'const';
break;
case '`':
$type = 'colref';
break; default:
if(is_numeric($token)) {
$type = 'const';
} else {
$type = 'colref';
}
break; }
#$processed = $token;
$processed = false;
}
}
/* is a reserved word? */
if(($type != 'operator' && $type != 'in-list' && $type != 'sub_expr') && in_array($upper, $this->reserved)) {
$token = $upper;
if(!in_array($upper,$this->functions)) {
$type = 'reserved';
} else {
switch($token) {
case 'AVG':
case 'SUM':
case 'COUNT':
case 'MIN':
case 'MAX':
case 'STDDEV':
case 'STDDEV_SAMP':
case 'STDDEV_POP':
case 'VARIANCE':
case 'VAR_SAMP':
case 'VAR_POP':
case 'GROUP_CONCAT':
case 'BIT_AND':
case 'BIT_OR':
case 'BIT_XOR':
$type = 'aggregate_function';
if(!empty($tokens[$key+1])) $sub_expr = $tokens[$key+1];
#$skip_next=true;
break; default:
$type = 'function';
if(!empty($tokens[$key+1])) $sub_expr = $tokens[$key+1]; else $sub_expr="()";
#$skip_next=true; break;
}
}
} if(!$type) {
if($upper[0] == '(') {
$local_expr = substr(trim($token),1,-1);
} else {
$local_expr = $token;
}
$processed = $this->process_expr_list($this->split_sql($local_expr));
$type = 'expression'; // if(count($processed) == 1) {
// $type = $processed[0]['expr_type'];
// $base_expr = $processed[0]['base_expr'];
// $processed = $processed[0]['sub_tree'];
// } } $sub_expr=trim($sub_expr);
$sub_expr = ""; $expr[] = array( 'expr_type' => $type, 'base_expr' => $token, 'sub_tree' => $processed);
$prev_token = $upper;
$expr_type = "";
$type = "";
}
if($sub_expr) {
$processed['sub_tree'] = $this->process_expr_list($this->split_sql(substr($sub_expr,1,-1)));
} if(!is_array($processed)) {
$processed = false;
} if($expr_type) {
$expr[] = array( 'expr_type' => $type, 'base_expr' => $token, 'sub_tree' => $processed);
}
$mod = false; /* for($i=0;$i<count($expr);++$i){
if($expr[$i]['expr_type'] == 'function' ||
$expr[$i]['expr_type'] == 'aggregate_function') {
if(!empty($expr[$i+1])) {
$expr[$i]['sub_tree']=$expr[$i+1]['sub_tree'];
unset($expr[$i+1]);
$mod = 1;
++$i; // BAD FORM TO MODIFY THE LOOP COUNTER
}
} } */ if($mod) $expr=array_values($expr); return $expr;
} private function process_update($tokens) { } private function process_delete($tokens) {
$tables = array();
$del = $tokens['DELETE']; foreach($tokens['DELETE'] as $expression) {
if ($expression != 'DELETE' && trim($expression,' .*') != "" && $expression != ',') {
$tables[] = trim($expression,'.* ');
}
} if(empty($tables)) {
foreach($tokens['FROM'] as $table) {
$tables[] = $table['table'];
}
} $tokens['DELETE'] = array('TABLES' => $tables); return $tokens;
} private function process_insert($tokens, $token_category = 'INSERT') {
$table = "";
$cols = ""; $into = $tokens['INTO'];
foreach($into as $token) {
if(!trim($token)) continue;
if(!$table) {
$table = $token;
}elseif(!$cols) {
$cols = $token;
}
} if(!$cols) {
$cols = 'ALL';
} else {
$cols = explode(",", $this->trimSubquery($cols));
}
unset($tokens['INTO']);
$tokens[$token_category] = array('table'=>$table, 'cols'=>$cols);
return $tokens; } private function load_reserved_words() { $this->functions = array(
'abs',
'acos',
'adddate',
'addtime',
'aes_encrypt',
'aes_decrypt',
'against',
'ascii',
'asin',
'atan',
'avg',
'benchmark',
'bin',
'bit_and',
'bit_or',
'bitcount',
'bitlength',
'cast',
'ceiling',
'char',
'char_length',
'character_length',
'charset',
'coalesce',
'coercibility',
'collation',
'compress',
'concat',
'concat_ws',
'conection_id',
'conv',
'convert',
'convert_tz',
'cos',
'cot',
'count',
'crc32',
'curdate',
'current_user',
'currval',
'curtime',
'database',
'date_add',
'date_diff',
'date_format',
'date_sub',
'day',
'dayname',
'dayofmonth',
'dayofweek',
'dayofyear',
'decode',
'default',
'degrees',
'des_decrypt',
'des_encrypt',
'elt',
'encode',
'encrypt',
'exp',
'export_set',
'extract',
'field',
'find_in_set',
'floor',
'format',
'found_rows',
'from_days',
'from_unixtime',
'get_format',
'get_lock',
'group_concat',
'greatest',
'hex',
'hour',
'if',
'ifnull',
'in',
'inet_aton',
'inet_ntoa',
'insert',
'instr',
'interval',
'is_free_lock',
'is_used_lock',
'last_day',
'last_insert_id',
'lcase',
'least',
'left',
'length',
'ln',
'load_file',
'localtime',
'localtimestamp',
'locate',
'log',
'log2',
'log10',
'lower',
'lpad',
'ltrim',
'make_set',
'makedate',
'maketime',
'master_pos_wait',
'match',
'max',
'md5',
'microsecond',
'mid',
'min',
'minute',
'mod',
'month',
'monthname',
'nextval',
'now',
'nullif',
'oct',
'octet_length',
'old_password',
'ord',
'password',
'period_add',
'period_diff',
'pi',
'position',
'pow',
'power',
'quarter',
'quote',
'radians',
'rand',
'release_lock',
'repeat',
'replace',
'reverse',
'right',
'round',
'row_count',
'rpad',
'rtrim',
'sec_to_time',
'second',
'session_user',
'sha',
'sha1',
'sign',
'soundex',
'space',
'sqrt',
'std',
'stddev',
'stddev_pop',
'stddev_samp',
'strcmp',
'str_to_date',
'subdate',
'substr',
'substring',
'substring_index',
'subtime',
'sum',
'sysdate',
'system_user',
'tan',
'time',
'timediff',
'timestamp',
'timestampadd',
'timestampdiff',
'time_format',
'time_to_sec',
'to_days',
'trim',
'truncate',
'ucase',
'uncompress',
'uncompressed_length',
'unhex',
'unix_timestamp',
'upper',
'user',
'utc_date',
'utc_time',
'utc_timestamp',
'uuid',
'var_pop',
'var_samp',
'variance',
'version',
'week',
'weekday',
'weekofyear',
'year',
'yearweek'); /* includes functions */
$this->reserved = array(
'abs',
'acos',
'adddate',
'addtime',
'aes_encrypt',
'aes_decrypt',
'against',
'ascii',
'asin',
'atan',
'avg',
'benchmark',
'bin',
'bit_and',
'bit_or',
'bitcount',
'bitlength',
'cast',
'ceiling',
'char',
'char_length',
'character_length',
'charset',
'coalesce',
'coercibility',
'collation',
'compress',
'concat',
'concat_ws',
'conection_id',
'conv',
'convert',
'convert_tz',
'cos',
'cot',
'count',
'crc32',
'curdate',
'current_user',
'currval',
'curtime',
'database',
'date_add',
'date_diff',
'date_format',
'date_sub',
'day',
'dayname',
'dayofmonth',
'dayofweek',
'dayofyear',
'decode',
'default',
'degrees',
'des_decrypt',
'des_encrypt',
'elt',
'encode',
'encrypt',
'exp',
'export_set',
'extract',
'field',
'find_in_set',
'floor',
'format',
'found_rows',
'from_days',
'from_unixtime',
'get_format',
'get_lock',
'group_concat',
'greatest',
'hex',
'hour',
'if',
'ifnull',
'in',
'inet_aton',
'inet_ntoa',
'insert',
'instr',
'interval',
'is_free_lock',
'is_used_lock',
'last_day',
'last_insert_id',
'lcase',
'least',
'left',
'length',
'ln',
'load_file',
'localtime',
'localtimestamp',
'locate',
'log',
'log2',
'log10',
'lower',
'lpad',
'ltrim',
'make_set',
'makedate',
'maketime',
'master_pos_wait',
'match',
'max',
'md5',
'microsecond',
'mid',
'min',
'minute',
'mod',
'month',
'monthname',
'nextval',
'now',
'nullif',
'oct',
'octet_length',
'old_password',
'ord',
'password',
'period_add',
'period_diff',
'pi',
'position',
'pow',
'power',
'quarter',
'quote',
'radians',
'rand',
'release_lock',
'repeat',
'replace',
'reverse',
'right',
'round',
'row_count',
'rpad',
'rtrim',
'sec_to_time',
'second',
'session_user',
'sha',
'sha1',
'sign',
'soundex',
'space',
'sqrt',
'std',
'stddev',
'stddev_pop',
'stddev_samp',
'strcmp',
'str_to_date',
'subdate',
'substring',
'substring_index',
'subtime',
'sum',
'sysdate',
'system_user',
'tan',
'time',
'timediff',
'timestamp',
'timestampadd',
'timestampdiff',
'time_format',
'time_to_sec',
'to_days',
'trim',
'truncate',
'ucase',
'uncompress',
'uncompressed_length',
'unhex',
'unix_timestamp',
'upper',
'user',
'utc_date',
'utc_time',
'utc_timestamp',
'uuid',
'var_pop',
'var_samp',
'variance',
'version',
'week',
'weekday',
'weekofyear',
'year',
'yearweek',
'add',
'all',
'alter',
'analyze',
'and',
'as',
'asc',
'asensitive',
'auto_increment',
'bdb',
'before',
'berkeleydb',
'between',
'bigint',
'binary',
'blob',
'both',
'by',
'call',
'cascade',
'case',
'change',
'char',
'character',
'check',
'collate',
'column',
'columns',
'condition',
'connection',
'constraint',
'continue',
'create',
'cross',
'current_date',
'current_time',
'current_timestamp',
'cursor',
'database',
'databases',
'day_hour',
'day_microsecond',
'day_minute',
'day_second',
'dec',
'decimal',
'declare',
'default',
'delayed',
'delete',
'desc',
'describe',
'deterministic',
'distinct',
'distinctrow',
'div',
'double',
'drop',
'else',
'elseif',
'enclosed',
'escaped',
'exists',
'exit',
'explain',
'false',
'fetch',
'fields',
'float',
'for',
'force',
'foreign',
'found',
'frac_second',
'from',
'fulltext',
'grant',
'group',
'having',
'high_priority',
'hour_microsecond',
'hour_minute',
'hour_second',
'if',
'ignore',
'in',
'index',
'infile',
'inner',
'innodb',
'inout',
'insensitive',
'insert',
'int',
'integer',
'interval',
'into',
'io_thread',
'is',
'iterate',
'join',
'key',
'keys',
'kill',
'leading',
'leave',
'left',
'like',
'limit',
'lines',
'load',
'localtime',
'localtimestamp',
'lock',
'long',
'longblob',
'longtext',
'loop',
'low_priority',
'master_server_id',
'match',
'mediumblob',
'mediumint',
'mediumtext',
'middleint',
'minute_microsecond',
'minute_second',
'mod',
'natural',
'not',
'no_write_to_binlog',
'null',
'numeric',
'on',
'optimize',
'option',
'optionally',
'or',
'order',
'out',
'outer',
'outfile',
'precision',
'primary',
'privileges',
'procedure',
'purge',
'read',
'real',
'references',
'regexp',
'rename',
'repeat',
'replace',
'require',
'restrict',
'return',
'revoke',
'right',
'rlike',
'second_microsecond',
'select',
'sensitive',
'separator',
'set',
'show',
'smallint',
'some',
'soname',
'spatial',
'specific',
'sql',
'sqlexception',
'sqlstate',
'sqlwarning',
'sql_big_result',
'sql_calc_found_rows',
'sql_small_result',
'sql_tsi_day',
'sql_tsi_frac_second',
'sql_tsi_hour',
'sql_tsi_minute',
'sql_tsi_month',
'sql_tsi_quarter',
'sql_tsi_second',
'sql_tsi_week',
'sql_tsi_year',
'ssl',
'starting',
'straight_join',
'striped',
'table',
'tables',
'terminated',
'then',
'timestampadd',
'timestampdiff',
'tinyblob',
'tinyint',
'tinytext',
'to',
'trailing',
'true',
'undo',
'union',
'unique',
'unlock',
'unsigned',
'update',
'usage',
'use',
'user_resources',
'using',
'utc_date',
'utc_time',
'utc_timestamp',
'values',
'varbinary',
'varchar',
'varcharacter',
'varying',
'when',
'where',
'while',
'with',
'write',
'xor',
'year_month',
'zerofill'
); for($i=0;$i<count($this->reserved);++$i) {
$this->reserved[$i]=strtoupper($this->reserved[$i]);
if(!empty($this->functions[$i])) $this->functions[$i] = strtoupper($this->functions[$i]);
}
} } // END CLASS
<?php
/**
* SQL Parser from: http://code.google.com/p/php-sql-parser/
* License: New BSD
*/
class PHPSQLParser
{
var $reserved = array();
var $functions = array();
function __construct($sql = false) {
#LOAD THE LIST OF RESERVED WORDS
$this->load_reserved_words();
if($sql) $this->parse($sql);
}
function parse($sql) {
$sql = trim($sql);
#lex the SQL statement
$in = $this->split_sql($sql);
#sometimes the parser needs to skip ahead until a particular
#token is found
$skip_until = false;
#this is the output tree which is being parsed
$out = array();
#This is the last type of union used (UNION or UNION ALL)
#indicates a) presence of at least one union in this query
# b) the type of union if this is the first or last query
$union = false;
#Sometimes a "query" consists of more than one query (like a UNION query)
#this array holds all the queries
$queries=array();
#This is the highest level lexical analysis. This is the part of the
#code which finds UNION and UNION ALL query parts
foreach($in as $key => $token) {
$token=trim($token);
if($skip_until) {
if($token) {
if(strtoupper($token) == $skip_until) {
$skip_until = false;
continue;
}
} else {
continue;
}
}
if(strtoupper($token) == "UNION") {
$union = 'UNION';
for($i=$key+1;$i<count($in);++$i) {
if(trim($in[$i]) == '') continue;
if(strtoupper($in[$i]) == 'ALL') {
$skip_until = 'ALL';
$union = 'UNION ALL';
continue ;
} else {
break;
}
}
$queries[$union][] = $out;
$out = array();
} else {
$out[]=$token;
}
}
if(!empty($out)) {
if ($union) {
$queries[$union][] = $out;
} else {
$queries[] = $out;
}
}
/*MySQL supports a special form of UNION:
(select ...)
union
(select ...)
This block handles this query syntax. Only one such subquery
is supported in each UNION block. (select)(select)union(select) is not legal.
The extra queries will be silently ignored.
*/
$union_types = array('UNION','UNION ALL');
foreach($union_types as $union_type) {
if(!empty($queries[$union_type])) {
foreach($queries[$union_type] as $i => $tok_list) {
foreach($tok_list as $z => $tok) {
$tok = trim($tok);
if(!$tok) continue;
if(preg_match('/^\\(\\s*select\\s*/i', $tok)) {
$queries[$union_type][$i] = $this->parse(substr($tok,1,-1));
break;
} else {
$queries[$union_type][$i] = $this->process_sql($queries[$union_type][$i]);
break;
}
}
}
}
}
/* If there was no UNION or UNION ALL in the query, then the query is
stored at $queries[0].
*/
if(!empty($queries[0])) {
$queries[0] = $this->process_sql($queries[0]);
}
if(count($queries) == 1 && !$union) {
$queries = $queries[0];
}
$this->parsed = $queries;
return $this->parsed;
}
#This function counts open and close parenthesis and
#returns their location. This might be faster as a regex
private function count_paren($token,$chars=array('(',')')) {
$len = strlen($token);
$open=array();
$close=array();
for($i=0;$i<$len;++$i){
if($token[$i] == $chars[0]) {
$open[] = $i;
} elseif($token[$i] == $chars[1]) {
$close[] = $i;
}
}
return array('open' => $open, 'close' => $close, 'balanced' =>( count($close) - count($open)));
}
#This function counts open and close parenthesis and
#returns their location. This might be faster as a regex
private function count_backtick($token) {
$len = strlen($token);
$cnt=0;
for($i=0;$i<$len;++$i){
if($token[$i] == '`') ++$cnt;
}
return $cnt;
}
#This is the lexer
#this function splits up a SQL statement into easy to "parse"
#tokens for the SQL processor
private function split_sql($sql) {
if(!is_string($sql)) {
return false;
}
$sql = str_replace(array('\\\'','\\"',"\r\n","\n","()"),array("''",'""'," "," "," "), $sql);
$regex=<<<EOREGEX
/(`(?:[^`]|``)`|[@A-Za-z0-9_.`-]+(?:\(\s*\)){0,1})
|(\+|-|\*|\/|!=|>=|<=|<>|>|<|&&|\|\||=|\^)
|(\(.*?\)) # Match FUNCTION(...) OR BAREWORDS
|('(?:[^']|'')*'+)
|("(?:[^"]|"")*"+)
|([^ ,]+)
/ix
EOREGEX
;
$tokens = preg_split($regex, $sql,-1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
$token_count = count($tokens);
/* The above regex has one problem, because the parenthetical match is not greedy.
Thus, when matching grouped expressions such as ( (a and b) or c) the
tokenizer will produce "( (a and b)", " ", "or", " " , "c,")"
This block detects the number of open/close parentheses in the given token. If the parentheses are balanced
(balanced == 0) then we don't need to do anything.
otherwise, we need to balance the expression.
*/
$reset = false;
for($i=0;$i<$token_count;++$i) {
if(empty($tokens[$i])) continue;
$token = $tokens[$i];
$trim = trim($token);
if($trim) {
if($trim[0] != '('
&& substr($trim,-1) == ')') {
$trim=trim(substr($trim,0,
strpos($trim,'(')));
}
$tokens[$i]=$trim;
$token=$trim;
}
if($token && $token[0] == '(') {
$info = $this->count_paren($token);
if($info['balanced'] == 0) {
continue;
}
// We need to find this many closing parentheses.
$needed = abs($info['balanced']);
$n = $i;
while($needed > 0 && $n <$token_count-1) {
++$n;
#echo "LOOKING FORWARD TO $n [ " . $tokens[$n] . "]\n";
$token2 = $tokens[$n];
$info2 = $this->count_paren($token2);
$closes = count($info2['close']);
if($closes != $needed) {
$tokens[$i] .= $tokens[$n];
unset($tokens[$n]);
$reset = true;
$info2 = $this->count_paren($tokens[$i]);
$needed = abs($info2['balanced']);
# echo "CLOSES LESS THAN NEEDED (still need $needed)\n";
} else {
/*get the string pos of the last close parenthesis we need*/
$pos = $info2['close'][count($info2['close'])-1];
$str1 = $str2 = "";
if($pos == 0) {
$str1 = ')';
} else {
$str1 = substr($tokens[$n],0,$pos) . ')';
$str2 = substr($tokens[$n],$pos+1);
}
#echo "CLOSES FOUND AT $n, offset:$pos [$str1] [$str2]\n";
if(strlen($str2) > 0) {
$tokens[$n] = $str2;
} else {
unset($tokens[$n]);
$reset = true;
}
$tokens[$i] .= $str1;
$info2 = $this->count_paren($tokens[$i]);
$needed = abs($info2['balanced']);
}
}
}
}
#the same problem appears with backticks :(
/* reset the array if we deleted any tokens above */
if ($reset) $tokens = array_values($tokens);
$token_count=count($tokens);
for($i=0;$i<$token_count;++$i) {
if(empty($tokens[$i])) continue;
$token=$tokens[$i];
$needed=true;
$reset=false;
if($needed && $token && strpos($token,'`') !== false) {
$info = $this->count_backtick($token);
if($info %2 == 0) { #even number of backticks means we are balanced
continue;
}
$needed=1;
$n = $i;
while($needed && $n <$token_count-1) {
$reset=true;
#echo "BACKTICK COUNT[$i]: $info old: {$tokens[$i]}, new: ($token)\n";
++$n;
$token .= $tokens[$n];
unset($tokens[$n]);
$needed = $this->count_backtick($token) % 2;
}
}
if($reset) $tokens[$i] = $token;
}
/* reset the array if we deleted any tokens above */
$tokens = array_values($tokens);
return $tokens;
}
/* This function breaks up the SQL statement into logical sections.
Some sections are then further handled by specialized functions.
*/
private function process_sql(&$tokens,$start_at = 0, $stop_at = false) {
$prev_category = "";
$start = microtime(true);
$token_category = "";
$skip_next=false;
$token_count = count($tokens);
if(!$stop_at) {
$stop_at = $token_count;
}
$out = false;
for($token_number = $start_at;$token_number<$stop_at;++$token_number) {
$token = trim($tokens[$token_number]);
if($token && $token[0] == '(' && $token_category == "") {
$token_category = 'SELECT';
}
/* If it isn't obvious, when $skip_next is set, then we ignore the next real
token, that is we ignore whitespace.
*/
if($skip_next) {
#whitespace does not count as a next token
if($token == "") {
continue;
}
#to skip the token we replace it with whitespace
$new_token = "";
$skip_next = false;
}
$upper = strtoupper($token);
switch($upper) {
/* Tokens that get their own sections. These keywords have subclauses. */
case 'SELECT':
case 'ORDER':
case 'LIMIT':
case 'SET':
case 'DUPLICATE':
case 'VALUES':
case 'GROUP':
case 'ORDER':
case 'HAVING':
case 'INTO':
case 'WHERE':
case 'RENAME':
case 'CALL':
case 'PROCEDURE':
case 'FUNCTION':
case 'DATABASE':
case 'SERVER':
case 'LOGFILE':
case 'DEFINER':
case 'RETURNS':
case 'EVENT':
case 'TABLESPACE':
case 'VIEW':
case 'TRIGGER':
case 'DATA':
case 'DO':
case 'PASSWORD':
case 'USER':
case 'PLUGIN':
case 'FROM':
case 'FLUSH':
case 'KILL':
case 'RESET':
case 'START':
case 'STOP':
case 'PURGE':
case 'EXECUTE':
case 'PREPARE':
case 'DEALLOCATE':
if($token == 'DEALLOCATE') {
$skip_next = true;
}
/* this FROM is different from FROM in other DML (not join related) */
if($token_category == 'PREPARE' && $upper == 'FROM') {
continue 2;
}
$token_category = $upper;
#$join_type = 'JOIN';
if($upper == 'FROM' && $token_category == 'FROM') {
/* DO NOTHING*/
} else {
continue 2;
}
break;
/* These tokens get their own section, but have no subclauses.
These tokens identify the statement but have no specific subclauses of their own. */
case 'DELETE':
case 'ALTER':
case 'INSERT':
case 'REPLACE':
case 'TRUNCATE':
case 'CREATE':
case 'TRUNCATE':
case 'OPTIMIZE':
case 'GRANT':
case 'REVOKE':
case 'SHOW':
case 'HANDLER':
case 'LOAD':
case 'ROLLBACK':
case 'SAVEPOINT':
case 'UNLOCK':
case 'INSTALL':
case 'UNINSTALL':
case 'ANALZYE':
case 'BACKUP':
case 'CHECK':
case 'CHECKSUM':
case 'REPAIR':
case 'RESTORE':
case 'CACHE':
case 'DESCRIBE':
case 'EXPLAIN':
case 'USE':
case 'HELP':
$token_category = $upper; /* set the category in case these get subclauses
in a future version of MySQL */
$out[$upper][0] = $upper;
continue 2;
break;
/* This is either LOCK TABLES or SELECT ... LOCK IN SHARE MODE*/
case 'LOCK':
if($token_category == "") {
$token_category = $upper;
$out[$upper][0] = $upper;
} else {
$token = 'LOCK IN SHARE MODE';
$skip_next=true;
$out['OPTIONS'][] = $token;
}
continue 2;
break;
case 'USING':
/* USING in FROM clause is different from USING w/ prepared statement*/
if($token_category == 'EXECUTE') {
$token_category=$upper;
continue 2;
}
if($token_category == 'FROM' && !empty($out['DELETE'])) {
$token_category=$upper;
continue 2;
}
break;
/* DROP TABLE is different from ALTER TABLE DROP ... */
case 'DROP':
if($token_category != 'ALTER') {
$token_category = $upper;
$out[$upper][0] = $upper;
continue 2;
}
break;
case 'FOR':
$skip_next=true;
$out['OPTIONS'][] = 'FOR UPDATE';
continue 2;
break;
case 'UPDATE':
if($token_category == "" ) {
$token_category = $upper;
continue 2;
}
if($token_category == 'DUPLICATE') {
continue 2;
}
break;
break;
case 'START':
$token = "BEGIN";
$out[$upper][0] = $upper;
$skip_next = true;
break;
/* These tokens are ignored. */
case 'BY':
case 'ALL':
case 'SHARE':
case 'MODE':
case 'TO':
case ';':
continue 2;
break;
case 'KEY':
if($token_category == 'DUPLICATE') {
continue 2;
}
break;
/* These tokens set particular options for the statement. They never stand alone.*/
case 'DISTINCTROW':
$token='DISTINCT';
case 'DISTINCT':
case 'HIGH_PRIORITY':
case 'LOW_PRIORITY':
case 'DELAYED':
case 'IGNORE':
case 'FORCE':
case 'STRAIGHT_JOIN':
case 'SQL_SMALL_RESULT':
case 'SQL_BIG_RESULT':
case 'QUICK':
case 'SQL_BUFFER_RESULT':
case 'SQL_CACHE':
case 'SQL_NO_CACHE':
case 'SQL_CALC_FOUND_ROWS':
$out['OPTIONS'][] = $upper;
continue 2;
break;
case 'WITH':
if($token_category == 'GROUP') {
$skip_next=true;
$out['OPTIONS'][] = 'WITH ROLLUP';
continue 2;
}
break;
case 'AS':
break;
case '':
case ',':
case ';':
break;
default:
break;
}
if($prev_category == $token_category) {
$out[$token_category][] = $token;
}
$prev_category = $token_category;
}
if(!$out) return false;
#process the SELECT clause
if(!empty($out['SELECT'])) $out['SELECT'] = $this->process_select($out['SELECT']);
if(!empty($out['FROM'])) $out['FROM'] = $this->process_from($out['FROM']);
if(!empty($out['USING'])) $out['USING'] = $this->process_from($out['USING']);
if(!empty($out['UPDATE'])) $out['UPDATE'] = $this->process_from($out['UPDATE']);
if(!empty($out['GROUP'])) $out['GROUP'] = $this->process_group($out['GROUP'], $out['SELECT']);
if(!empty($out['ORDER'])) $out['ORDER'] = $this->process_group($out['ORDER'], $out['SELECT']);
if(!empty($out['LIMIT'])) $out['LIMIT'] = $this->process_limit($out['LIMIT']);
if(!empty($out['WHERE'])) $out['WHERE'] = $this->process_expr_list($out['WHERE']);
if(!empty($out['HAVING'])) $out['HAVING'] = $this->process_expr_list($out['HAVING']);
if(!empty($out['SET'])) $out['SET'] = $this->process_set_list($out['SET']);
if(!empty($out['DUPLICATE'])) {
$out['ON DUPLICATE KEY UPDATE'] = $this->process_set_list($out['DUPLICATE']);
unset($out['DUPLICATE']);
}
if(!empty($out['INSERT'])) $out = $this->process_insert($out);
if(!empty($out['REPLACE'])) $out = $this->process_insert($out,'REPLACE');
if(!empty($out['DELETE'])) $out = $this->process_delete($out);
return $out;
}
/* A SET list is simply a list of key = value expressions separated by comma (,).
This function produces a list of the key/value expressions.
*/
private function process_set_list($tokens) {
$column="";
$expression="";
foreach($tokens as $token) {
$token=trim($token);
if(!$column) {
if($token === false || empty($token)) continue;
$column .= $token;
continue;
}
if($token == '=') continue;
if($token == ',') {
$expr[] = array('column' => trim($column), 'expr' => trim($expression));
$expression = $column = "";
continue;
}
$expression .= $token;
}
if($expression) {
$expr[] = array('column' => trim($column), 'expr' => trim($expression));
}
return $expr;
}
/* This function processes the LIMIT section.
start,end are set. If only end is provided in the query
then start is set to 0.
*/
private function process_limit($tokens) {
$start = 0;
$end = 0;
if($pos = array_search(',',$tokens)) {
for($i=0;$i<$pos;++$i) {
if($tokens[$i] != '') {
$start = $tokens[$i];
break;
}
}
$pos = $pos + 1;
} else {
$pos = 0;
}
for($i=$pos;$i<count($tokens);++$i) {
if($tokens[$i] != '') {
$end = $tokens[$i];
break;
}
}
return array('start' => $start, 'end' => $end);
}
/* This function processes the SELECT section. It splits the clauses at the commas.
Each clause is then processed by process_select_expr() and the results are added to
the expression list.
Finally, at the end, the expression list is returned.
*/
private function process_select(&$tokens) {
$expression = "";
$expr = array();
foreach($tokens as $token) {
if($token == ',') {
$expr[] = $this->process_select_expr(trim($expression));
$expression = "";
} else {
if($token === "" || $token===false) $token=" ";
$expression .= $token ;
}
}
$expression = trim($expression);
if($expression) $expr[] = $this->process_select_expr($expression);
return $expr;
}
/* This function processes each SELECT clause. We determine what (if any) alias
is provided, and we set the type of expression.
*/
private function process_select_expr($expression) {
if (empty($expression)){
return '';
}
$capture = false;
$alias = "";
$base_expression = $expression;
$upper = trim(strtoupper($expression));
#if necessary, unpack the expression
if($upper[0] == '(') {
#$expression = substr($expression,1,-1);
$base_expression = $expression;
}
$tokens = $this->split_sql($expression);
$token_count = count($tokens);
/* Determine if there is an explicit alias after the AS clause.
If AS is found, then the next non-whitespace token is captured as the alias.
The tokens after (and including) the AS are removed.
*/
$base_expr = "";
$stripped=array();
$capture=false;
$alias = "";
$processed=false;
for($i=0;$i<$token_count;++$i) {
$token = strtoupper($tokens[$i]);
if(trim($token)) {
$stripped[] = $tokens[$i];
}
if($token == 'AS') {
unset($tokens[$i]);
$capture = true;
continue;
}
if($capture) {
if(trim($token)) {
$alias .= $tokens[$i];
}
unset($tokens[$i]);
continue;
}
$base_expr .= $tokens[$i];
}
$stripped = $this->process_expr_list($stripped);
$last = array_pop($stripped);
if(!$alias && $last['expr_type'] == 'colref') {
$prev = array_pop($stripped);
if($prev['expr_type'] == 'operator' ||
$prev['expr_type'] == 'const' ||
$prev['expr_type'] == 'function' ||
$prev['expr_type'] == 'expression' ||
#$prev['expr_type'] == 'aggregate_function' ||
$prev['expr_type'] == 'subquery' ||
$prev['expr_type'] == 'colref') {
$alias = $last['base_expr'];
#remove the last token
array_pop($tokens);
$base_expr = join("", $tokens);
}
}
if(!$alias) {
$base_expr=join("", $tokens);
$alias = $base_expr;
}
/* Properly escape the alias if it is not escaped */
if ($alias[0] != '`') {
$alias = '`' . str_replace('`','``',$alias) . '`';
}
$processed = false;
$type='expression';
if(substr(trim($base_expr),0,1) == '(') {
$base_expr = substr($expression,1,-1);
if(preg_match('/^sel/i', $base_expr)) {
$type='subquery';
$processed = $this->parse($base_expr);
}
}
if(!$processed) {
$processed = $this->process_expr_list($tokens);
}
if(count($processed) == 1) {
$type = $processed[0]['expr_type'];
$processed = false;
}
return array('expr_type'=>$type,'alias' => $alias, 'base_expr' => $base_expr, 'sub_tree' => $processed);
}
private function trimSubquery($sq)
{
$sq = trim($sq);
if(empty($sq)) return '';
while($sq[0] == '(' && substr($sq, -1) == ')') {
$sq = substr($sq, 1, -1);
}
return $sq;
}
private function process_from(&$tokens) {
$expression = "";
$expr = array();
$token_count=0;
$table = "";
$alias = "";
$skip_next=false;
$i=0;
$join_type = '';
$ref_type="";
$ref_expr="";
$base_expr="";
$sub_tree = false;
$subquery = "";
$first_join=true;
$modifier="";
$saved_join_type="";
foreach($tokens as $token) {
$base_expr = false;
$upper = strtoupper(trim($token));
if($skip_next && $token) {
$token_count++;
$skip_next = false;
continue;
} else {
if($skip_next) {
continue;
}
}
if(preg_match("/^\\s*\\(\\s*select/i",$token)) {
$type = 'subquery';
$table = "DEPENDENT-SUBQUERY";
$sub_tree = $this->parse($this->trimSubquery($token));
$subquery = $token;
}
switch($upper) {
case 'OUTER':
case 'LEFT':
case 'RIGHT':
case 'NATURAL':
case 'CROSS':
case ',':
case 'JOIN':
break;
default:
$expression .= $token == '' ? " " : $token;
if($ref_type) {
$ref_expr .= $token == '' ? " " : $token;
}
break;
}
switch($upper) {
case 'AS':
$token_count++;
$n=1;
$alias = "";
while($alias == "") {
$alias = trim($tokens[$i+$n]);
++$n;
}
continue;
break;
case 'INDEX':
if($token_category == 'CREATE') {
$token_category = $upper;
continue 2;
}
break;
case 'USING':
case 'ON':
$ref_type = $upper;
$ref_expr = "";
case 'CROSS':
case 'USE':
case 'FORCE':
case 'IGNORE':
case 'INNER':
case 'OUTER':
# $expression .= $token;
$token_count++;
continue;
break;
case 'FOR':
$token_count++;
$skip_next = true;
continue;
break;
case 'LEFT':
case 'RIGHT':
case 'STRAIGHT_JOIN':
$join_type=$saved_join_type;
$modifier = $upper . " ";
break;
case ',':
$modifier = 'CROSS';
case 'JOIN':
if($first_join) {
$join_type = 'JOIN';
$saved_join_type = ($modifier ? $modifier : 'JOIN');
} else {
$new_join_type = ($modifier ? $modifier : 'JOIN');
$join_type = $saved_join_type;
$saved_join_type = $new_join_type;
unset($new_join_type);
}
$first_join = false;
if(!trim($alias)) $alias = $table;
if($subquery) {
$sub_tree = $this->parse(trim($subquery,'()'));
$base_expr=$subquery;
}
if(substr(trim($table),0,1) == '(') {
$base_expr=$this->trimSubquery($table);
$join_type = 'JOIN';
$sub_tree = $this->process_from($this->split_sql($base_expr));
$alias="";
}
if($join_type == "") $join_type='JOIN';
$expr[] = array('table'=>$table, 'alias'=>$alias,'join_type'=>$join_type,'ref_type'=> $ref_type,'ref_clause'=>$this->trimSubquery($ref_expr), 'base_expr' => $base_expr, 'sub_tree' => $sub_tree);
$modifier = "";
#$join_type=$saved_join_type;
$token_count = 0;
$table = $alias = $expression = $base_expr = $ref_type = $ref_expr = "";
$sub_tree=false;
$subquery = "";
break;
default:
if($token === false || empty($token) || $token === "") continue;
if($token_count == 0 ) {
if(!$table) {
$table = $token ;
}
} else if($token_count == 1) {
$alias = $token;
}
$token_count++;
break;
}
++$i;
}
if(substr(trim($table),0,1) == '(') {
$base_expr=$this->trimSubquery($table);
$join_type = 'JOIN';
$sub_tree = $this->process_from($this->split_sql($base_expr));
$alias = "";
} else {
if(!trim($alias)) $alias = $table;
}
if($join_type == "") $saved_join_type='JOIN';
$expr[] = array('table'=>$table, 'alias'=>$alias,'join_type'=>$saved_join_type,'ref_type'=> $ref_type,'ref_clause'=> $this->trimSubquery($ref_expr), 'base_expr' => $base_expr, 'sub_tree' => $sub_tree);
return $expr;
}
private function process_group(&$tokens, &$select) {
$out=array();
$expression = "";
$direction="ASC";
$type = "expression";
if(!$tokens) return false;
foreach($tokens as $token) {
switch(strtoupper($token)) {
case ',':
$expression = trim($expression);
if($expression[0] != '`' || substr($expression,-1) != '`') {
$escaped = str_replace('`','``',$expression);
} else {
$escaped = $expression;
}
$escaped = '`' . $escaped . '`';
if(is_numeric(trim($expression))) {
$type = 'pos';
} else {
#search to see if the expression matches an alias
foreach($select as $clause) {
if($clause['alias'] == $escaped) {
$type = 'alias';
}
}
if(!$type) $type = "expression";
}
$out[]=array('type'=>$type,'base_expr'=>$expression,'direction'=>$direction);
$escaped = "";
$expression = "";
$direction = "ASC";
$type = "";
break;
case 'ASC':
$direction = "ASC";
break;
case 'DESC':
$direction = "DESC";
break;
default:
$expression .= $token == '' ? ' ' : $token;
}
}
if($expression) {
$expression = trim($expression);
if($expression[0] != '`' || substr($expression,-1) != '`') {
$escaped = str_replace('`','``',$expression);
} else {
$escaped = $expression;
}
$escaped = '`' . $escaped . '`';
if(is_numeric(trim($expression))) {
$type = 'pos';
} else {
#search to see if the expression matches an alias
if(!$type && $select) {
foreach($select as $clause) {
if(!is_array($clause)) continue;
if($clause['alias'] == $escaped) {
$type = 'alias';
}
}
} else {
$type="expression";
}
if(!$type) $type = "expression";
}
$out[]=array('type'=>$type,'base_expr'=>$expression,'direction'=>$direction);
}
foreach($out as &$term) {
if(!empty($term['base_expr'])) {
$term['sub_tree'] = array($this->process_select_expr($term['base_expr']));
}
}
return $out;
}
/* Some sections are just lists of expressions, like the WHERE and HAVING clauses. This function
processes these sections. Recursive.
*/
private function process_expr_list($tokens) {
$expr = "";
$type = "";
$prev_token = "";
$skip_next = false;
$sub_expr = "";
$in_lists = array();
foreach($tokens as $key => $token) {
if(strlen(trim($token))==0) continue;
if($skip_next) {
$skip_next = false;
continue;
}
$processed = false;
$upper = strtoupper(trim($token));
if(trim($token)) $token=trim($token);
/* is it a subquery?*/
if(preg_match("/^\\s*\\(\\s*SELECT/i", $token)) {
$type = 'subquery';
#tokenize and parse the subquery.
#we remove the enclosing parenthesis for the tokenizer
$processed = $this->parse($this->trimSubquery($token));
/* is it an inlist */
} elseif( $upper[0] == '(' && substr($upper,-1) == ')' ) {
if($prev_token == 'IN') {
$type = "in-list";
$processed = $this->split_sql(substr($token,1,-1));
$list = array();
foreach($processed as $v) {
if($v == ',') continue;
$list[]=$v;
}
$processed = $list;
unset($list);
$prev_token = "";
}
elseif($prev_token == 'AGAINST') {
$type = "match-arguments";
$list = $this->split_sql(substr($token,1,-1));
if(count($list) > 1){
$match_mode = implode('',array_slice($list,1));
$processed = array($list[0], $match_mode);
}
else
$processed = $list[0];
$prev_token = "";
}
/* it is either an operator, a colref or a constant */
} else {
switch($upper) {
case 'AND':
case '&&':
case 'BETWEEN':
case 'AND':
case 'BINARY':
case '&':
case '~':
case '|':
case '^':
case 'CASE':
case 'WHEN':
case 'END':
case 'DIV':
case '/':
case '<=>':
case '=':
case '>=':
case '>':
case 'IS':
case 'NOT':
case 'NULL':
case '<<':
case '<=':
case '<':
case 'LIKE':
case '-':
case '%':
case '!=':
case '<>':
case 'REGEXP':
case '!':
case '||':
case 'OR':
case '+':
case '>>':
case 'RLIKE':
case 'SOUNDS':
case '*':
case '-':
case 'XOR':
case 'IN':
$processed = false;
$type = "operator";
break;
default:
switch($token[0]) {
case "'":
case '"':
$type = 'const';
break;
case '`':
$type = 'colref';
break;
default:
if(is_numeric($token)) {
$type = 'const';
} else {
$type = 'colref';
}
break;
}
#$processed = $token;
$processed = false;
}
}
/* is a reserved word? */
if(($type != 'operator' && $type != 'in-list' && $type != 'sub_expr') && in_array($upper, $this->reserved)) {
$token = $upper;
if(!in_array($upper,$this->functions)) {
$type = 'reserved';
} else {
switch($token) {
case 'AVG':
case 'SUM':
case 'COUNT':
case 'MIN':
case 'MAX':
case 'STDDEV':
case 'STDDEV_SAMP':
case 'STDDEV_POP':
case 'VARIANCE':
case 'VAR_SAMP':
case 'VAR_POP':
case 'GROUP_CONCAT':
case 'BIT_AND':
case 'BIT_OR':
case 'BIT_XOR':
$type = 'aggregate_function';
if(!empty($tokens[$key+1])) $sub_expr = $tokens[$key+1];
#$skip_next=true;
break;
default:
$type = 'function';
if(!empty($tokens[$key+1])) $sub_expr = $tokens[$key+1]; else $sub_expr="()";
#$skip_next=true;
break;
}
}
}
if(!$type) {
if($upper[0] == '(') {
$local_expr = substr(trim($token),1,-1);
} else {
$local_expr = $token;
}
$processed = $this->process_expr_list($this->split_sql($local_expr));
$type = 'expression';
// if(count($processed) == 1) {
// $type = $processed[0]['expr_type'];
// $base_expr = $processed[0]['base_expr'];
// $processed = $processed[0]['sub_tree'];
// }
}
$sub_expr=trim($sub_expr);
$sub_expr = "";
$expr[] = array( 'expr_type' => $type, 'base_expr' => $token, 'sub_tree' => $processed);
$prev_token = $upper;
$expr_type = "";
$type = "";
}
if($sub_expr) {
$processed['sub_tree'] = $this->process_expr_list($this->split_sql(substr($sub_expr,1,-1)));
}
if(!is_array($processed)) {
$processed = false;
}
if($expr_type) {
$expr[] = array( 'expr_type' => $type, 'base_expr' => $token, 'sub_tree' => $processed);
}
$mod = false;
/*
for($i=0;$i<count($expr);++$i){
if($expr[$i]['expr_type'] == 'function' ||
$expr[$i]['expr_type'] == 'aggregate_function') {
if(!empty($expr[$i+1])) {
$expr[$i]['sub_tree']=$expr[$i+1]['sub_tree'];
unset($expr[$i+1]);
$mod = 1;
++$i; // BAD FORM TO MODIFY THE LOOP COUNTER
}
}
}
*/
if($mod) $expr=array_values($expr);
return $expr;
}
private function process_update($tokens) {
}
private function process_delete($tokens) {
$tables = array();
$del = $tokens['DELETE'];
foreach($tokens['DELETE'] as $expression) {
if ($expression != 'DELETE' && trim($expression,' .*') != "" && $expression != ',') {
$tables[] = trim($expression,'.* ');
}
}
if(empty($tables)) {
foreach($tokens['FROM'] as $table) {
$tables[] = $table['table'];
}
}
$tokens['DELETE'] = array('TABLES' => $tables);
return $tokens;
}
private function process_insert($tokens, $token_category = 'INSERT') {
$table = "";
$cols = "";
$into = $tokens['INTO'];
foreach($into as $token) {
if(!trim($token)) continue;
if(!$table) {
$table = $token;
}elseif(!$cols) {
$cols = $token;
}
}
if(!$cols) {
$cols = 'ALL';
} else {
$cols = explode(",", $this->trimSubquery($cols));
}
unset($tokens['INTO']);
$tokens[$token_category] = array('table'=>$table, 'cols'=>$cols);
return $tokens;
}
private function load_reserved_words() {
$this->functions = array(
'abs',
'acos',
'adddate',
'addtime',
'aes_encrypt',
'aes_decrypt',
'against',
'ascii',
'asin',
'atan',
'avg',
'benchmark',
'bin',
'bit_and',
'bit_or',
'bitcount',
'bitlength',
'cast',
'ceiling',
'char',
'char_length',
'character_length',
'charset',
'coalesce',
'coercibility',
'collation',
'compress',
'concat',
'concat_ws',
'conection_id',
'conv',
'convert',
'convert_tz',
'cos',
'cot',
'count',
'crc32',
'curdate',
'current_user',
'currval',
'curtime',
'database',
'date_add',
'date_diff',
'date_format',
'date_sub',
'day',
'dayname',
'dayofmonth',
'dayofweek',
'dayofyear',
'decode',
'default',
'degrees',
'des_decrypt',
'des_encrypt',
'elt',
'encode',
'encrypt',
'exp',
'export_set',
'extract',
'field',
'find_in_set',
'floor',
'format',
'found_rows',
'from_days',
'from_unixtime',
'get_format',
'get_lock',
'group_concat',
'greatest',
'hex',
'hour',
'if',
'ifnull',
'in',
'inet_aton',
'inet_ntoa',
'insert',
'instr',
'interval',
'is_free_lock',
'is_used_lock',
'last_day',
'last_insert_id',
'lcase',
'least',
'left',
'length',
'ln',
'load_file',
'localtime',
'localtimestamp',
'locate',
'log',
'log2',
'log10',
'lower',
'lpad',
'ltrim',
'make_set',
'makedate',
'maketime',
'master_pos_wait',
'match',
'max',
'md5',
'microsecond',
'mid',
'min',
'minute',
'mod',
'month',
'monthname',
'nextval',
'now',
'nullif',
'oct',
'octet_length',
'old_password',
'ord',
'password',
'period_add',
'period_diff',
'pi',
'position',
'pow',
'power',
'quarter',
'quote',
'radians',
'rand',
'release_lock',
'repeat',
'replace',
'reverse',
'right',
'round',
'row_count',
'rpad',
'rtrim',
'sec_to_time',
'second',
'session_user',
'sha',
'sha1',
'sign',
'soundex',
'space',
'sqrt',
'std',
'stddev',
'stddev_pop',
'stddev_samp',
'strcmp',
'str_to_date',
'subdate',
'substr',
'substring',
'substring_index',
'subtime',
'sum',
'sysdate',
'system_user',
'tan',
'time',
'timediff',
'timestamp',
'timestampadd',
'timestampdiff',
'time_format',
'time_to_sec',
'to_days',
'trim',
'truncate',
'ucase',
'uncompress',
'uncompressed_length',
'unhex',
'unix_timestamp',
'upper',
'user',
'utc_date',
'utc_time',
'utc_timestamp',
'uuid',
'var_pop',
'var_samp',
'variance',
'version',
'week',
'weekday',
'weekofyear',
'year',
'yearweek');
/* includes functions */
$this->reserved = array(
'abs',
'acos',
'adddate',
'addtime',
'aes_encrypt',
'aes_decrypt',
'against',
'ascii',
'asin',
'atan',
'avg',
'benchmark',
'bin',
'bit_and',
'bit_or',
'bitcount',
'bitlength',
'cast',
'ceiling',
'char',
'char_length',
'character_length',
'charset',
'coalesce',
'coercibility',
'collation',
'compress',
'concat',
'concat_ws',
'conection_id',
'conv',
'convert',
'convert_tz',
'cos',
'cot',
'count',
'crc32',
'curdate',
'current_user',
'currval',
'curtime',
'database',
'date_add',
'date_diff',
'date_format',
'date_sub',
'day',
'dayname',
'dayofmonth',
'dayofweek',
'dayofyear',
'decode',
'default',
'degrees',
'des_decrypt',
'des_encrypt',
'elt',
'encode',
'encrypt',
'exp',
'export_set',
'extract',
'field',
'find_in_set',
'floor',
'format',
'found_rows',
'from_days',
'from_unixtime',
'get_format',
'get_lock',
'group_concat',
'greatest',
'hex',
'hour',
'if',
'ifnull',
'in',
'inet_aton',
'inet_ntoa',
'insert',
'instr',
'interval',
'is_free_lock',
'is_used_lock',
'last_day',
'last_insert_id',
'lcase',
'least',
'left',
'length',
'ln',
'load_file',
'localtime',
'localtimestamp',
'locate',
'log',
'log2',
'log10',
'lower',
'lpad',
'ltrim',
'make_set',
'makedate',
'maketime',
'master_pos_wait',
'match',
'max',
'md5',
'microsecond',
'mid',
'min',
'minute',
'mod',
'month',
'monthname',
'nextval',
'now',
'nullif',
'oct',
'octet_length',
'old_password',
'ord',
'password',
'period_add',
'period_diff',
'pi',
'position',
'pow',
'power',
'quarter',
'quote',
'radians',
'rand',
'release_lock',
'repeat',
'replace',
'reverse',
'right',
'round',
'row_count',
'rpad',
'rtrim',
'sec_to_time',
'second',
'session_user',
'sha',
'sha1',
'sign',
'soundex',
'space',
'sqrt',
'std',
'stddev',
'stddev_pop',
'stddev_samp',
'strcmp',
'str_to_date',
'subdate',
'substring',
'substring_index',
'subtime',
'sum',
'sysdate',
'system_user',
'tan',
'time',
'timediff',
'timestamp',
'timestampadd',
'timestampdiff',
'time_format',
'time_to_sec',
'to_days',
'trim',
'truncate',
'ucase',
'uncompress',
'uncompressed_length',
'unhex',
'unix_timestamp',
'upper',
'user',
'utc_date',
'utc_time',
'utc_timestamp',
'uuid',
'var_pop',
'var_samp',
'variance',
'version',
'week',
'weekday',
'weekofyear',
'year',
'yearweek',
'add',
'all',
'alter',
'analyze',
'and',
'as',
'asc',
'asensitive',
'auto_increment',
'bdb',
'before',
'berkeleydb',
'between',
'bigint',
'binary',
'blob',
'both',
'by',
'call',
'cascade',
'case',
'change',
'char',
'character',
'check',
'collate',
'column',
'columns',
'condition',
'connection',
'constraint',
'continue',
'create',
'cross',
'current_date',
'current_time',
'current_timestamp',
'cursor',
'database',
'databases',
'day_hour',
'day_microsecond',
'day_minute',
'day_second',
'dec',
'decimal',
'declare',
'default',
'delayed',
'delete',
'desc',
'describe',
'deterministic',
'distinct',
'distinctrow',
'div',
'double',
'drop',
'else',
'elseif',
'enclosed',
'escaped',
'exists',
'exit',
'explain',
'false',
'fetch',
'fields',
'float',
'for',
'force',
'foreign',
'found',
'frac_second',
'from',
'fulltext',
'grant',
'group',
'having',
'high_priority',
'hour_microsecond',
'hour_minute',
'hour_second',
'if',
'ignore',
'in',
'index',
'infile',
'inner',
'innodb',
'inout',
'insensitive',
'insert',
'int',
'integer',
'interval',
'into',
'io_thread',
'is',
'iterate',
'join',
'key',
'keys',
'kill',
'leading',
'leave',
'left',
'like',
'limit',
'lines',
'load',
'localtime',
'localtimestamp',
'lock',
'long',
'longblob',
'longtext',
'loop',
'low_priority',
'master_server_id',
'match',
'mediumblob',
'mediumint',
'mediumtext',
'middleint',
'minute_microsecond',
'minute_second',
'mod',
'natural',
'not',
'no_write_to_binlog',
'null',
'numeric',
'on',
'optimize',
'option',
'optionally',
'or',
'order',
'out',
'outer',
'outfile',
'precision',
'primary',
'privileges',
'procedure',
'purge',
'read',
'real',
'references',
'regexp',
'rename',
'repeat',
'replace',
'require',
'restrict',
'return',
'revoke',
'right',
'rlike',
'second_microsecond',
'select',
'sensitive',
'separator',
'set',
'show',
'smallint',
'some',
'soname',
'spatial',
'specific',
'sql',
'sqlexception',
'sqlstate',
'sqlwarning',
'sql_big_result',
'sql_calc_found_rows',
'sql_small_result',
'sql_tsi_day',
'sql_tsi_frac_second',
'sql_tsi_hour',
'sql_tsi_minute',
'sql_tsi_month',
'sql_tsi_quarter',
'sql_tsi_second',
'sql_tsi_week',
'sql_tsi_year',
'ssl',
'starting',
'straight_join',
'striped',
'table',
'tables',
'terminated',
'then',
'timestampadd',
'timestampdiff',
'tinyblob',
'tinyint',
'tinytext',
'to',
'trailing',
'true',
'undo',
'union',
'unique',
'unlock',
'unsigned',
'update',
'usage',
'use',
'user_resources',
'using',
'utc_date',
'utc_time',
'utc_timestamp',
'values',
'varbinary',
'varchar',
'varcharacter',
'varying',
'when',
'where',
'while',
'with',
'write',
'xor',
'year_month',
'zerofill'
);
for($i=0;$i<count($this->reserved);++$i) {
$this->reserved[$i]=strtoupper($this->reserved[$i]);
if(!empty($this->functions[$i])) $this->functions[$i] = strtoupper($this->functions[$i]);
}
}
} // END CLASS
php-sql-parser sql防注入脚本的更多相关文章
- 万能写入sql语句,并且防注入
通过perpare()方法和检查字段防sql注入. $pdo=new PDO('mysql:host=localhost;dbname=scms', 'root' ); $_POST=array('t ...
- SQL防注入程序
1.在Global.asax.cs中写入: protected void Application_BeginRequest(Object sender,EventArgs e){ SqlIn ...
- SQL防注入程序 v1.0
/// ***************C#版SQL防注入程序 v1.0************ /// *使用方法: /// 一.整站防注入(推荐) /// 在Global.asax.cs中查找App ...
- PHP之SQL防注入代码集合(建站常用)
SQL防注入代码一 <?php if (!function_exists (quote)) { function quote($var) { if (strlen($var)) { $var=! ...
- phpcms v9 sql注入脚本
phpcms v9 SQL注入脚本 用法:python phpcms.py http://www.baidu.com import requests,sys,urllib url = sys.argv ...
- mybatis 的sql语句及使用mybatis的动态sql mybatis防注入
由于看到写的比较详细的文档这里将之前的删掉了,只留下一些我认为能帮助理解的和关于动态sql及防注入的一些理解.文档链接 :mybatis官方文档介绍 <!-- 根据条件查询用户 --> ...
- sql 防注入 维基百科
http://zh.wikipedia.org/wiki/SQL%E8%B3%87%E6%96%99%E9%9A%B1%E7%A2%BC%E6%94%BB%E6%93%8A SQL攻击(SQL inj ...
- .net 过滤 sql防注入类,省地以后每次都要重新弄!
/// <summary> /// 过滤不安全的字符串 /// </summary> /// <param name="Str"&g ...
- 特殊字符的过滤方法,防sql防注入代码的过滤方法
特殊字符的过滤方法 function strFilter($str){ //特殊字符的过滤方法 $str = str_replace('`', '', $str); $str = str_replac ...
随机推荐
- iOS真机运行 Xcode报错(libpng error: CgBI: unhandled critical chunk)问题已解决;
Cocos2d-x加载图片资源出现libpng error: CgBI: unhandled critical chunk Xcode7.3 设置Remove Text Metadata From P ...
- [Android Tips] 19. Android Studio Plugins
Code Generation GsonFormat json 字符串生成实体类 https://github.com/zzz40500/GsonFormat Android Parcelable C ...
- SqlServer数据库空间使用情况常用命令
--最简单的办法就是使用SSM客户端,报表查看 --查询数据文件的空间情况 dbcc showfilestats --查询日志文件的空间情况 dbcc sqlperf(logspace) --查询te ...
- GPS部标监控平台的架构设计(八)-基于WCF的平台数据通信设计
总体来讲,GPS部标平台的软件开发是一个对网络通信和应用程序之间通信的技术应用密集型的开发工作,也是有一定设计技术含量的工作. 1.设计通信接口 在设计的时候,根据职责划分,拆分成不同的应用子系统,对 ...
- 画布清理////////////////////////////zzzz
HTML5画布清理,重绘,旧的线条也会出现 <!DOCTYPE html> <html> <head> <title>HTLM5</title&g ...
- node.js 入门实例【转】
第1章 一个简单的博客 nswbmw edited this page 14 days ago · 38 revisions Pages 29 Home FAQ 番外篇之——使用 _id 查询 番外篇 ...
- linux-bash shell学习
什么是shell?shell就相当于是计算机给我提供的一个操作系统的接口,这里说的bash shell是一种命令行方面的软件,提供给用户来操作系统.
- SQLServer游标(Cursor) (B)
游标(Cursor)是处理数据的一种方法,为了查看或者处理结果集中的数据,游标提供了在结果集中一次以行或者多行前进或向后浏览数据的能力.我们可以把游标当作一个指针,它可以指定结果中的任何位置,然后允许 ...
- post数据过大到服务端,接收不到的问题
在页面把datagrid上的数据post到服务端,解析提供导出.datagrid的数据大概有1w. 结果能post过去,但在服务端接收的数据显示null.但是如果post6000条左右就没问题. 经过 ...
- 谈谈我印象中的JVM不足之处
研究JVM也有一段时间了,其间也发现了它的很多不足之处,在此一一道来,由于本人对JVM的理解有限,如有错误的地方,还请大家指正:本文不介绍名词性术语和概念性知识,如有不了解的地方可Search Goo ...