<?php
if($_SERVER['REQUEST_METHOD'] == "POST")
{
  switch($_POST['number'])
  {
   case 1:
     mysql_query('DELETE FROM `ip`');
     if(!$handle = fopen("xyz1", 'w'))
     {
      fclose($handle);
     }
     break;
   case 2:
     mysql_query('DELETE FROM `ip2`');
     if(!$handle = fopen("xyz2", 'w'))
     {
      fclose($handle);
     }
     break;
   case 3:
     mysql_query('DELETE FROM `ip3`');
     if(!$handle = fopen("xyz3", 'w'))
     {
      fclose($handle);
     }
     break;
  }
}
?>
 
<form method="POST">
 <input type='hidden' name='number' value='1'>
 <input type=submit value="Delete ip1">
</form>
 
<form method="POST">
 <input type='hidden' name='number' value='2'>
 <input type=submit value="Delete ip2">
</form>

<form method="POST">
 <input type='hidden' name='number' value='3'>
 <input type=submit value="Delete ip3">
</form>