PHP

php preg_match email validation code

<?php
   function checkemail($str) {
         return (!preg_match("/^([a-z0-9+_-]+)(.[a-z0-9+_-]+)*@([a-z0-9-]+.)+[a-z]{2,6}$/ix", $str)) ? FALSE : TRUE;
   }
   if(!checkemail("alex@tutorialspoint.com")){
      echo "Invalid email address.";
   }
   else{
      echo "Valid email address.";
   }
?>