1.配置文件设置

  1. $db_name   = "ecshop";
  2.  
  3. $prefix    = "ecs_";
  4.  
  5. $timezone    = "Europe/Berlin";
  6.  
  7. $cookie_path    = "/";
  8.  
  9. $cookie_domain    = "";
  10.  
  11. $session = "1440";
  12.  
  13. $_config = array();
  14.  
  15. //数据库主服务器设置, 支持多组服务器设置, 当设置多组服务器时, 则会随机使用某个服务器
  16. $_config['master'][1]['dbhost'] = "192.168.2.175:3306";
  17. $_config['master'][1]['dbname'] = "ecshop";
  18. $_config['master'][1]['dbuser'] = "dragon";
  19. $_config['master'][1]['dbpw'] = "loong";
  20.  
  21. /*
  22.  *$_config['master'][2]['dbhost'] = "";
  23.  *...
  24.  */
  25.  
  26. //数据库从服务器设置( slave, 只读 ), 支持多组服务器设置, 当设置多组服务器时, 系统每次随机使用
  27. $_config['slave'][1]['dbhost'] = "192.168.2.176:3306";
  28. $_config['slave'][1]['dbname'] = "ecshop";
  29. $_config['slave'][1]['dbuser'] = "ivan";
  30. $_config['slave'][1]['dbpw'] = "loong";
  31.  
  32. $_config['slave'][2]['dbhost'] = "192.168.2.177:3306";
  33. $_config['slave'][2]['dbname'] = "ecshop";
  34. $_config['slave'][2]['dbuser'] = "ivan";
  35. $_config['slave'][2]['dbpw'] = "loong";
  36.  
  37. define('EC_CHARSET','utf-8');
  38.  
  39. define('ADMIN_PATH','admin');
  40.  
  41. define('AUTH_KEY', 'this is a key');
  42.  
  43. define('OLD_AUTH_KEY', '');
  44.  
  45. define('API_TIME', '');

2.初始化数据连接类 init.php

  1. /* 如果配置了从服务器，则初始化从库类  */
  2.     if(count($_config['slave'])) {
  3.         require(ROOT_PATH . 'includes/cls_mysql_slave.php');
  4.         $db = new cls_mysql_slave($_config);
  5.     }else{
  6.         require(ROOT_PATH . 'includes/cls_mysql.php');
  7.         $db = new cls_mysql($_config);
  8.     }

3.编写从库类文件

  1. require(ROOT_PATH . 'includes/cls_mysql.php');
  2. class cls_mysql_slave extends cls_mysql
  3. {
  4.     var $slaveid = null;
  5.     function set_config($config){
  6.         if(!empty($this->config['slave'])) {
  7.             $this->slaveid = array_rand($this->config['slave']);
  8.         }
  9.         parent::set_config($config);
  10.     }
  11.     /* 随机分配从库连接 */
  12.     function set_slave_config() {
  13.         $this->settings = $this->config['slave'][$this->slaveid];
  14.         $this->settings['charset'] = $this->config['charset'];
  15.         $this->settings['pconnect'] = $this->config['pconnect'];
  16.     }
  17.     function slave_connect() {
  18.         $this->set_slave_config();
  19.         $dbhost = $this->settings['dbhost'];
  20.         $dbuser = $this->settings['dbuser'];
  21.         $dbpw = $this->settings['dbpw'];
  22.         $dbname = $this->settings['dbname'];
  23.         $this->connect($dbhost, $dbuser, $dbpw, $dbname);
  24.  
  25.     }
  26.     function query($sql, $type = '') {
  27.         // 如果执行查询操作，则执行从库连接
  28.         if($this->slaveid && strtoupper(substr($sql, 0 , 6)) == 'SELECT') {
  29.             $this->slave_connect();
  30.         }else{
  31.             parent::set_config($this->config);
  32.             $dbhost = $this->settings['dbhost'];
  33.             $dbuser = $this->settings['dbuser'];
  34.             $dbpw = $this->settings['dbpw'];
  35.             $dbname = $this->settings['dbname'];
  36.             $this->connect($dbhost, $dbuser, $dbpw, $dbname);
  37.         }
  38.         return parent::query($sql, $type);
  39.     }
  40.     /* 删除失败连接*/
  41.     function del_error_link(){
  42.         unset($this->config['slave'][$this->slaveid]);
  43.         $this->set_config($this->config);
  44.         $this->set_slave_config();
  45.         $dbhost = $this->settings['dbhost'];
  46.         $dbuser = $this->settings['dbuser'];
  47.         $dbpw = $this->settings['dbpw'];
  48.         $dbname = $this->settings['dbname'];
  49.         $this->connect($dbhost, $dbuser, $dbpw, $dbname);
  50.     }
  51.  
  52. }

4.cls_mysql类库修改

  1. <?php
  2. if (!defined('IN_ECS'))
  3. {
  4.     die('Hacking attempt');
  5. }
  6. class cls_mysql
  7. {
  8.     var $link_id    = NULL;
  9.     var $settings   = array();
  10.     var $queryCount = 0;
  11.     var $linkCount = 0;
  12.     var $queryTime  = '';
  13.     var $queryLog   = array();
  14.     var $max_cache_time = 300; // 最大的缓存时间，以秒为单位
  15.     var $cache_data_dir = 'temp/query_caches/';
  16.     var $root_path      = '';
  17.     var $error_message  = array();
  18.     var $platform       = '';
  19.     var $version        = '';
  20.     var $dbhash         = '';
  21.     var $starttime      = 0;
  22.     var $timeline       = 0;
  23.     var $timezone       = 0;
  24.     var $mysql_config_cache_file_time = 0;
  25.     var $mysql_disable_cache_tables = array(); // 不允许被缓存的表，遇到将不会进行缓存
  26.     var $config = array();
  27.     function __construct($config, $charset = 'utf8', $pconnect = 0, $quiet = 0)
  28.     {
  29.         $this->cls_mysql($config, $charset, $pconnect, $quiet);
  30.     }
  31.     function cls_mysql($config, $charset = 'utf8', $pconnect = 0, $quiet = 0)
  32.     {
  33.         if(!empty($config)) {
  34.             $config['charset'] = $charset;
  35.             $config['pconnect'] = $pconnect;
  36.             $this->config = $config;
  37.         }
  38.  
  39.         if (defined('EC_CHARSET'))
  40.         {
  41.             $charset = strtolower(str_replace('-', '', EC_CHARSET));
  42.         }
  43.         if (defined('ROOT_PATH') && !$this->root_path)
  44.         {
  45.             $this->root_path = ROOT_PATH;
  46.         }
  47.         $this->set_config($this->config);
  48.         if ($quiet)
  49.         {
  50.             $dbhost = $this->settings['dbhost'];
  51.             $dbuser = $this->settings['dbuser'];
  52.             $dbpw = $this->settings['dbpw'];
  53.             $dbname = $this->settings['dbname'];
  54.             $this->connect($dbhost, $dbuser, $dbpw, $dbname, $charset, $pconnect, $quiet);
  55.         }
  56.     }
  57.     //随机分配数据库连接
  58.     function set_config($config) {
  59.         $sid = array_rand($config['master']);
  60.         $settings = $config['master'][$sid];
  61.         $settings['sid'] = $sid;
  62.         $settings['charset'] = $this->config['charset'];
  63.         $settings['pconnect'] = $this->config['pconnect'];
  64.         $this->settings = $settings;
  65.     }
  66.     function connect($dbhost, $dbuser, $dbpw, $dbname = '', $charset = 'utf8', $pconnect = 0, $quiet = 0)
  67.     {
  68.         if ($pconnect)
  69.         {
  70.             if (!($this->link_id = @mysql_pconnect($dbhost, $dbuser, $dbpw)))
  71.             {
  72.                 if (!$quiet)
  73.                 {
  74.                     $this->ErrorMsg("Can't pConnect MySQL Server!");
  75.                 }
  76.                 return false;
  77.             }
  78.         }
  79.         else
  80.         {
  81.             if (PHP_VERSION >= '4.2')
  82.             {
  83.                 $this->link_id = @mysql_connect($dbhost, $dbuser, $dbpw, true);
  84.             }
  85.             else
  86.             {
  87.                 $this->link_id = @mysql_connect($dbhost, $dbuser, $dbpw);
  88.                 mt_srand((double)microtime() * 1000000); // 对 PHP 4.2 以下的版本进行随机数函数的初始化工作
  89.             }
  90.             if (!$this->link_id)
  91.             {
  92.                 if (!$quiet)
  93.                 {
  94.                     //连接超过10次，中断连接，抛出错误
  95.                     if($this->linkCount>9){
  96.                         $this->ErrorMsg("Can't Connect MySQL Server!");
  97.                     }
  98.                     $this->linkCount++;
  99.                     $this->del_error_link();
  100.                 }
  101.                 return false;
  102.             }
  103.         }
  104.         $this->dbhash  = md5($this->root_path . $dbhost . $dbuser . $dbpw . $dbname);
  105.         $this->version = mysql_get_server_info($this->link_id);
  106.         /* 如果mysql 版本是 4.1+ 以上，需要对字符集进行初始化 */
  107.         if ($this->version > '4.1')
  108.         {
  109.             if ($charset != 'latin1')
  110.             {
  111.                 mysql_query("SET character_set_connection=$charset, character_set_results=$charset, character_set_client=binary", $this->link_id);
  112.             }
  113.             if ($this->version > '5.0.1')
  114.             {
  115.                 mysql_query("SET sql_mode=''", $this->link_id);
  116.             }
  117.         }
  118.         $sqlcache_config_file = $this->root_path . $this->cache_data_dir . 'sqlcache_config_file_' . $this->dbhash . '.php';
  119.         @include($sqlcache_config_file);
  120.         $this->starttime = time();
  121.         if ($this->max_cache_time && $this->starttime > $this->mysql_config_cache_file_time + $this->max_cache_time)
  122.         {
  123.             if ($dbhost != '.')
  124.             {
  125.                 $result = mysql_query("SHOW VARIABLES LIKE 'basedir'", $this->link_id);
  126.                 $row    = mysql_fetch_assoc($result);
  127.                 if (!empty($row['Value']{1}) && $row['Value']{1} == ':' && !empty($row['Value']{2}) && $row['Value']{2} == "\\")
  128.                 {
  129.                     $this->platform = 'WINDOWS';
  130.                 }
  131.                 else
  132.                 {
  133.                     $this->platform = 'OTHER';
  134.                 }
  135.             }
  136.             else
  137.             {
  138.                 $this->platform = 'WINDOWS';
  139.             }
  140.             if ($this->platform == 'OTHER' &&
  141.                 ($dbhost != '.' && strtolower($dbhost) != 'localhost:3306' && $dbhost != '127.0.0.1:3306') ||
  142.                 (PHP_VERSION >= '5.1' && date_default_timezone_get() == 'UTC'))
  143.             {
  144.                 $result = mysql_query("SELECT UNIX_TIMESTAMP() AS timeline, UNIX_TIMESTAMP('" . date('Y-m-d H:i:s', $this->starttime) . "') AS timezone", $this->link_id);
  145.                 $row    = mysql_fetch_assoc($result);
  146.                 if ($dbhost != '.' && strtolower($dbhost) != 'localhost:3306' && $dbhost != '127.0.0.1:3306')
  147.                 {
  148.                     $this->timeline = $this->starttime - $row['timeline'];
  149.                 }
  150.                 if (PHP_VERSION >= '5.1' && date_default_timezone_get() == 'UTC')
  151.                 {
  152.                     $this->timezone = $this->starttime - $row['timezone'];
  153.                 }
  154.             }
  155.             $content = '<' . "?php\r\n" .
  156.                        '$this->mysql_config_cache_file_time = ' . $this->starttime . ";\r\n" .
  157.                        '$this->timeline = ' . $this->timeline . ";\r\n" .
  158.                        '$this->timezone = ' . $this->timezone . ";\r\n" .
  159.                        '$this->platform = ' . "'" . $this->platform . "';\r\n?" . '>';
  160.             @file_put_contents($sqlcache_config_file, $content);
  161.         }
  162.         /* 选择数据库 */
  163.         if ($dbname)
  164.         {
  165.             if (mysql_select_db($dbname, $this->link_id) === false )
  166.             {
  167.                 if (!$quiet)
  168.                 {
  169.                     $this->ErrorMsg("Can't select MySQL database!");
  170.                 }
  171.                 return false;
  172.             }
  173.             else
  174.             {
  175.                 return true;
  176.             }
  177.         }
  178.         else
  179.         {
  180.             return true;
  181.         }
  182.     }
  183.     ......
  184.     /* 删除失败连接*/
  185.     function del_error_link(){
  186.         unset($this->config['master'][$this->settings['sid']]);
  187.         $this->set_config($this->config);
  188.         $dbhost = $this->settings['dbhost'];
  189.         $dbuser = $this->settings['dbuser'];
  190.         $dbpw = $this->settings['dbpw'];
  191.         $dbname = $this->settings['dbname'];
  192.         $this->connect($dbhost, $dbuser, $dbpw, $dbname);
  193.     }
  194. }

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