简单的mysql操作类

<?php

final class MySQL {

    private $connection;

    

    public function __construct($hostname, $username, $password, $database) {

        if (!$this->connection = mysql_connect($hostname, $username, $password)) {

      exit('Error: Could not make a database connection using ' . $username . '@' . $hostname);

    }

 

    if (!mysql_select_db($database, $this->connection)) {

      exit('Error: Could not connect to database ' . $database);

    }

        

        mysql_query("SET NAMES 'utf8'", $this->connection);

        mysql_query("SET CHARACTER SET utf8", $this->connection);

        mysql_query("SET CHARACTER_SET_CONNECTION=utf8", $this->connection);

        mysql_query("SET SQL_MODE = ''", $this->connection);

  }

        

  public function query($sql) {

        $resource = mysql_query($sql, $this->connection);

 

        if ($resource) {

            if (is_resource($resource)) {

                

                $i = 0; $data = array();    

                while ($result = mysql_fetch_assoc($resource)) {

                    $data[$i] = $result;     

                    $i++;

                }

                

                mysql_free_result($resource);

                

                $query = new stdClass();

                $query->row = isset($data[0]) ? $data[0] : array();

                $query->rows = $data;

                $query->num_rows = $i;

                

                unset($data);

                return $query;    

                

        } else {

                return TRUE;

            }

        } else {

      exit('Error: ' . mysql_error($this->connection) . '<br />Error No: ' . mysql_errno($this->connection) . '<br />' . $sql);

    }

  }

    

    public function escape($value) {

        return mysql_real_escape_string($value, $this->connection);

    }

    

    public function countAffected() {

        return mysql_affected_rows($this->connection);

    }

 

    public function getLastId() {

        return mysql_insert_id($this->connection);

    }    

    

    public function __destruct() {

        mysql_close($this->connection);

    }

}

?>