这么删除不了数据。确提示删除成功，汗

这样删除不了数据。确提示删除成功，汗

PHP code

<?php session_start();
if($_SESSION[name]==""){
    exit();
}
include "img/ddddd.php";
$ming=$_SESSION[name];
$shan=$_GET["num"];
echo $shan;
$sql=mysql_query("delete from `readuser` where `falsename`='$shan' and `username`='$ming'");
if($sql){
echo "