formhandler.php

<?php
$nameErr = $emailErr = $phoneErr = "";
$name = $email = $phonenumber = $state = "";

if ($_SERVER["REQUEST_METHOD"] == "POST") {
  if (empty($_POST["name"])) {
    $nameErr = "Name is required";
  } else {
    $name = test_input($_POST["name"]);
	if (!preg_match("/^[a-zA-Z ]*$/",$name)) {
		$nameErr = "Only letters and white space allowed"; 
	}
  }

  if (empty($_POST["email"])) {
    $emailErr = "Email is required";
  } else {
    $email = test_input($_POST["email"]);
	if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
		$emailErr = "Invalid email format"; 
	}
  }

  if (empty($_POST["phonenumber"])) {
    $website = "";
  } else {
    $website = test_input($_POST["phonenumber"]);
	if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$website)) {
		$websiteErr = "Invalid URL"; 
	}
  }
	
  $state = test_input($_POST["state"]);

}

?>