MySQL数据库单例连接简单实现（MySQL扩展）

/**
 * MySQL数据库单例实现
 * 
 * @author shizqiang at 2015-04-22
 *
 */
final class MySQLFactory {
    
    private static $instance;
    
    private function __construct() {}
    
    public static function getInstance($server, $uname, $passwd, $dbname) {
        if (!self::$instance) {
            self::$instance = mysql_connect($server, $uname, $passwd) or die();
            mysql_select_db($dbname, self::$instance) or die();
            mysql_set_charset(‘utf-8‘, self::$instance);
        }
        return self::$instance;
    }
}

$link = MySQLFactory::getInstance(‘localhost‘, ‘root‘, ‘123456‘, ‘test‘);