解密后php代码修改 请求帮助

[wjk860]

<?php
/*********************/
/*                   */
/*  Version : 5.1.0  */
/*  Author  : RM     */
/*  Comment : 071223 */
/*                   */
/*********************/

include_once( "../include/dbcommon.php" );
include_once( dirname( __FILE__ )."/../include/sessions_class.php" );
include_once( "../include/sql.php" );
include_once( "../include/function.php" );
$urlurl = "http://127.0.0.1";
if ( $urlurl != $zy_site_url )
{
				echo "域名出错";
				exit( );
}
$urlurl = "http://".$_SERVER['SERVER_NAME'];
if ( $urlurl != $zy_site_url )
{
				echo "域名出错啦";
				exit( );
}
if ( empty( $_SESSION['admin_username'] ) || empty( $_SESSION['admin_pwd'] ) )
{
				_obfuscate_ZnVuX2FsZXJ0( "用户名和密码错误/或是没有登陆！" );
				_obfuscate_ZnVuX2dv( "login.php" );
				exit( );
}
$sql = "select * from admin where username='".$_SESSION['admin_username']."' ";
if ( !( $rs = _obfuscate_CXIZARoUBQt7HD8( $sql ) ) )
{
				exit( _obfuscate_LGZ3P20BE2Z1ZGs( ) );
}
$num = mysql_num_rows( $rs );
$row = mysql_fetch_array( $rs );
if ( $row['pwd'] != $_SESSION['admin_pwd'] )
{
				_obfuscate_ZnVuX2FsZXJ0( "用户名和密码错误！" );
				_obfuscate_ZnVuX2dv( "login.php" );
				exit( );
}
?>

这是一段解密后的php代码 其中_obfuscate_前缀的都是混淆函数

希望大侠们可以帮我修改代码解决程序运行问题