/**
  * 执行sql
  * @param  array $queries
  * @return
  */
 private function execSql($queries)
 {
     $count = count($queries);
     for ($i = $this->step; $i < $count; $i++) {
         $sql = trim($queries[$i]);
         if (strstr($sql, 'CREATE TABLE')) {
             // CREATE TABLE
             preg_match('/CREATE TABLE `([^ ]*)`/', $sql, $matches);
             if (mysql_query($sql)) {
                 $info = '<li>' . current_state_support("创建数据表{$matches[1]}完成") . '</li>';
             } else {
                 $info = '<li>' . current_state_support("创建数据表{$matches[1]}失败") . '</li>';
             }
             $this->closeDb();
             $this->ajaxReturn(array('step' => ++$i, 'info' => $info));
         } else {
             // DROP TABLE 或 INSERT INTO
             mysql_query($sql);
         }
     }
     $this->step = $i;
 }
 private function getGDInfo()
 {
     if (function_exists('gd_info')) {
         $gd = gd_info();
         return current_state_support($gd['GD Version']);
     }
     return current_state_unsupport('不支持');
 }