Ajax form

ajax-form.php

<?php
  //Initialize errors variable and array
  $errors = array();
  $jsonError = "";
   
  //Initialize post values and clean data
  if(isset($_POST['userName'])){$name = trim(strip_tags(addslashes($_POST['userName'])));}
  if(isset($_POST['email'])){$email = trim(strip_tags(addslashes($_POST['email'])));}
  if(isset($_POST['subject'])){$subject = trim(strip_tags(addslashes($_POST['subject'])));}
  if(isset($_POST['message'])){$message = trim(strip_tags(addslashes($_POST['message'])));}
  if(isset($_POST['honeypot'])){$honeypot = trim(strip_tags(addslashes($_POST['honeypot'])));}
   
  //Simple form validation
  if(empty($name)){
    $errors[] = "Name required. <br/>";
  }
  if(empty($email) || !filter_var($email, FILTER_VALIDATE_EMAIL)){
    $errors[] = "Email is invalid. <br/>";
  }
  if(empty($subject)){
    $errors[] = "Please enter a subject. <br/>";
  }
  if(empty($message)){
    $errors[] = "Message required. <br/>";
  }
  if(!empty($honeypot)){
    $errors[] = "Go away you bad spam! <br/>";
  }
   
  //-----------------------------------
  //Loop through errors array.
  //Since we can only send back only one
  //key to the client at a time, we
  //must store them into one variable
  //-------------------------------------
  foreach($errors as $error){
    $jsonError .= $error;
  }
   
  //If errors variable is not empty, show errors. Otherwise, send the mail to my email address
  if(!empty($errors)){
  //Send back json encoded errors array to Javascript
  echo json_encode(array("error" => $jsonError));
  }else{
  //Send back json encoded success message array
  echo json_encode(array("success" => "Submission successful! <br/>
  We will contact you using the email: <br/>
  <span class='myemail'>$email</span> <br/>
  Thank you $name!"));
   
  //Mail message
  $to = "example@gmail.com";
  $headers = "$email [$name]";
  mail($to, $subject, $message, $headers);
  }
?>