send-contact.php

<?php
if($_POST)
{
	$to_Email   	= "admin@themes.ads"; //Replace with recipient email address
	$subject        = 'Bistro - New Contact Inquiry'; //Subject line for emails
	
	
	//check if its an ajax request, exit if not
    if(!isset($_SERVER['HTTP_X_REQUESTED_WITH']) AND strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) != 'xmlhttprequest') {
	
		//exit script outputting json data
		$output = json_encode(
		array(
			'type'=>'error', 
			'text' => 'Request must come from Ajax'
		));
		
		die($output);
    } 
	
	//check $_POST vars are set, exit if any missing
	if(!isset($_POST["userName"]) || !isset($_POST["userEmail"]) || !isset($_POST["userMessage"]))
	{
		$output = json_encode(array('type'=>'error', 'text' => 'Input fields are empty!'));
		die($output);
	}

	//Sanitize input data using PHP filter_var().
	$user_Name        = filter_var($_POST["userName"], FILTER_SANITIZE_STRING);
	$user_Email       = filter_var($_POST["userEmail"], FILTER_SANITIZE_EMAIL);
	
	$user_Telephone =" ";
	
	if (isset($_POST["userTelephone"])){
	$user_Telephone   = filter_var($_POST["userTelephone"], FILTER_SANITIZE_EMAIL);	
	}
	
	$user_Message     = filter_var($_POST["userMessage"], FILTER_SANITIZE_STRING);
	
	//additional php validation
	if(strlen($user_Name)<3) // If length is less than 3 it will throw an HTTP error.
	{
		$output = json_encode(array('type'=>'error', 'text' => 'Name is too short or empty!'));
		die($output);
	}
	if(!filter_var($user_Email, FILTER_VALIDATE_EMAIL)) //email validation
	{
		$output = json_encode(array('type'=>'error', 'text' => 'Please enter a valid email!'));
		die($output);
	}
	
	if(strlen($user_Message)<5) //check emtpy message
	{
		$output = json_encode(array('type'=>'error', 'text' => 'Too short message! Please enter something.'));
		die($output);
	}
	
	
	$message_Body = "<strong>Name: </strong>". $user_Name ."<br>";
	$message_Body .= "<strong>Email: </strong>". $user_Email ."<br>";
	$message_Body .= "<strong>Phone No: </strong>". $user_Telephone ."<br>";
	$message_Body .= "<strong>Message: </strong>". $user_Message ."<br>";
	
	
	
	$headers = "From: " . strip_tags($user_Email) . "\r\n";
    $headers .= "Reply-To: ". strip_tags($user_Email) . "\r\n";
    $headers .= "MIME-Version: 1.0\r\n";
    $headers .= "Content-Type: text/html; charset=ISO-8859-1\r\n";
	
	
	
	//proceed with PHP email.
	/*$headers = 'From: '.$user_Email.'' . "\r\n" .
	'Reply-To: '.$user_Email.'' . "\r\n" .
	'X-Mailer: PHP/' . phpversion();
	*/
	
	
	$sentMail = @mail($to_Email, $subject, $message_Body, $headers);
	
	if(!$sentMail)
	{
		$output = json_encode(array('type'=>'error', 'text' => 'Could not send mail! Please check your PHP mail configuration.'));
		die($output);
	}else{
		$output = json_encode(array('type'=>'message', 'text' => 'Hi '.$user_Name .' Thank you for contacting us.'));
		die($output);
	}
}
?>