function in_t($a){ 
 global $db; 
 $a = $db->real_escape_string(htmlspecialchars(trim($a))); 
 return $a; 
 } 
 function int($a){ 
 $a = abs(intval($a)); 
 return $a; 
 }   

   $lal = in_t($_POST['lal']); 
 $lal = int($_POST['lal']);