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."; } ?>