<?php
 
// your code goes here
$first_name = '3432'; // required
$last_name = 'name'; // required
$email_from = 'test@email.com'; // required
$comments = 'Comments'; // required
 
$error_message = "";
$email_exp = '/^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$/';
if(!preg_match($email_exp,$email_from)) {
$error_message .= 'The Email Address you entered does not appear to be valid.<br />';}
$string_exp = "/^[A-Za-z .'-]+$/";
if(!preg_match($string_exp,$first_name)) {
$error_message .= 'The First Name you entered does not appear to be valid.<br />';}
if(!preg_match($string_exp,$last_name)) {
$error_message .= 'The Last Name you entered does not appear to be valid.<br />';}
if(strlen($comments) < 2) {
$error_message .= 'The Comments you entered do not appear to be valid.<br />';}
if(strlen($error_message) > 0) {
  exit($error_message);
} else {
	echo 'valid';
}

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