PHP 批量删除数据的方法

 HTML代码
<form action="" method="post">
<input name="ID_Dele[]" type="checkbox" id="ID_Dele[]" value="1"/>
<input name="ID_Dele[]" type="checkbox" id="ID_Dele[]" value="2"/>
<input name="ID_Dele[]" type="checkbox" id="ID_Dele[]" value="3"/>
<input name="ID_Dele[]" type="checkbox" id="ID_Dele[]" value="4"/>
<input type="submit"/>
</form>
php函数主要用到implode 
<?php
if ($_POST["action"]="doing"){
$del_id=$_POST["ID_Dele"];
$ID_Dele= implode(",",$_POST['ID_Dele']);
echo "合并后:".$ID_Dele."<br />合并前:";
if($del_id!=""){
$del_num=count($del_id);
for($i=0;$i<$del_num;$i++){
echo $del_id[$i];
}
}
}else{
echo "请提交";
}
?>  
SQL 语句
$SQL="delete from `doing` where id in ($ID_Dele)";