数据库删除操作

/*delete.php*/

<?php
include("connect.php");

//判断传值是否为空
if($_GET[‘ud‘]==‘ ‘)
{
	die(‘未传值!‘);
	mysql_error();
}

$sql="delete from stu where stu_id=".$_GET[‘ud‘];
//删除数据库中的数据

mysql_query($sql);

$num=mysql_affected_rows();
//函数获得数据库中“受影响的”数据的个数

//返回是否删除成功
if($num>0)
{//如果受影响个数大于0，则必然操作成功
	echo "<center>";
	echo "<script>alert(‘Congratulation!delete successed!‘)</script><br>";
	echo "<a href=‘table.php‘>return</a>";
	echo "</center>";
}
else
{
	echo "<center>";
	echo "<script>alert(‘Sorry!failed to delete!‘)</script><br>";
	echo "<a href=‘table.php‘>return</a>";
	echo "</center>";
}

?>