<form action="/index.php" method="POST" >
<input name='pers_delete' type='submit' value="SUM_NAME" class='del_pers'/>
</form>
<?
if (isset($_POST['pers_delete'])){
echo $_POST['value'];
}
?>
<form action="/index.php" method="POST" >
<input name='pers_delete' type='hidden' value="сюда подставляете значение переменной"/>
<input name='submit' type='submit' value="1" class='del_pers'/>
</form>
<?php
if (isset($_POST['submit']))
{
echo $_POST['pers_delete'];
}
?>