contact-form.php

<?php
//error_reporting(E_ALL ^ E_NOTICE); // hide all basic notices from PHP

$response = array(
    "errors"    => false,
    "success"   => true,
    "messages"  => "",
);

if($_SERVER["REQUEST_METHOD"] == "POST") {
    if(isset($_POST['submitted'])) {
        // require a name from user
        if(trim($_POST['contactName']) === '') {
            $nameError =  'Forgot your name!';
            $hasError = true;
            $response["messages"]   = "Forgot your name!";
            $response["errors"]     = true;
            $response["success"]    = false;
        } else {
            $name = trim($_POST['contactName']);
        }

        // need valid email
        if(trim($_POST['email']) === '')  {
            $emailError = 'Forgot to enter in your e-mail address.';
            $hasError = true;
            $response["messages"]   = "Forgot to enter in your e-mail address.";
            $response["errors"]     = true;
            $response["success"]    = false;
        } else if (!preg_match("/^[[:alnum:]][a-z0-9_.-]*@[a-z0-9.-]+\.[a-z]{2,4}$/i", trim($_POST['email']))) {
            $emailError = 'You entered an invalid email address.';
            $response["messages"]   = "You entered an invalid email address.";
            $response["errors"]     = true;
            $response["success"]    = false;
            $hasError = true;
        } else {
            $email = trim($_POST['email']);
        }

        // we need at least some content
        if(trim($_POST['comments']) === '') {
            $commentError = 'You forgot to enter a message!';
            $hasError = true;
            $response["messages"]   = "Forgot to enter a message!";
            $response["errors"]     = true;
            $response["success"]    = false;
        } else {
            if(function_exists('stripslashes')) {
                $comments = stripslashes(trim($_POST['comments']));
            } else {
                $comments = trim($_POST['comments']);
            }   
        }   
        // we need phone number
        if(trim($_POST['phone']) === '') {
            $phoneError = 'You forgot to enter a phone number';
            $hasError = true;
            $response["messages"]   = "You forgot to enter a phone number";
            $response["errors"]     = true;
            $response["success"]    = false;
        } else {
            if(function_exists('stripslashes')) {
                $phone = stripslashes(trim($_POST['phone']));
            } else {
                $phone = trim($_POST['phone']);
            }   
        }   
    
        // upon no failure errors let's email now!
        if(!isset($hasError)) {
            $emailTo = 'gzuiderweg@gmail.com';
            $subject = 'Submitted message from '.$name;
            $sendCopy = trim($_POST['sendCopy']);
            $body = "Name: $name \n\nEmail: $email \n\Phone: $phone \n\nComments: $comments";
            $headers = 'From: ' .' <'.$emailTo.'>' . "\r\n" . 'Reply-To: ' . $email;

            mail($emailTo, $subject, $body, $headers);
    
            // set our boolean completion value to TRUE
            $emailSent = true;
        }   
    }   
    header('Content-Type: application/json');
    echo json_encode($response);
} else { 
    echo "This page should only be POSTed to.";
}
?>