LevelsLark 1.03

<?
// <readme>
/*
	This is a lite version of Olark's and Intercom's functionality (without the chat part).

	It lets you get feedback from users on your site to your email.
	
	And you won't have to rely on another company anymore!

	#killyourdependencies

	You use it like this. Put this in your PHP page wherever you want the box to show up:
	
		require('feedback-popup.php');

	You can also embed it as a JS file:

		<script src="/feedback-popup.php?action=feedback-popup-as-js"></script>

	Make sure you embed it AFTER you load jQuery.

	The JS will POST the message to your server at /feedback-popup.php, make sure the file is
	in your root for it to work.
	
	P.S. You need 2 dependencies, jQuery and PHPMailer
	P.S. 2. Feel free to replace the PHP with JS etc and take it.

	License: do whatever you want with this, I don't care <3333
*/
// </readme>

// <config>
	// change these values!
	// enter the to name and to email address the messages are sent to
	$config['toName']='Remote OK';
	$config['toEmail']='[email protected]';
	// you'll need an SMTP server, I use MailChimp's Mandrill:
	// https://mandrillapp.com
	// $config['smtp']['hostname']='smtp.mandrillapp.com';
	// $config['smtp']['port']=587;
	// $config['smtp']['server']['secure']='tls';
	// enter your login to the SMTP serveR:
	// $config['smtp']['username']='';
	// $config['smtp']['password']='';
	// you'll need PHPMailer: https://github.com/PHPMailer/PHPMailer
	// specify the path to it here:
	$config['pathToPHPMailer']=__DIR__.'/../lib/smtp-mailer/class.phpmailer.php';
	$config['pathToPHPMailerSMTP']=__DIR__.'/../lib/smtp-mailer/class.phpmailer.php';
// </config>

if($_GET['action']=='feedback-popup-as-js') {
	// enable embedding as JS file
	header('Content-Type: application/javascript');
	?>
	$(function() {
		$.get('<?=$_SERVER['HTTPS'] ? 'https://' : 'http://';?><?=$_SERVER['HTTP_HOST']?>/feedback-popup.php',function(html) {
			$('body').append(html);
		});
	})
	<?
	exit;
}
if(empty($_POST['message'])) {
	// show feedback page
	?>
	<div class="feedback-popup">
		<span class="title">
			Need help?
		</span>
		<i class="fa fa-chevron-up action-expand-feedback-popup"></i>
		<span class="text">
			Need help? Have feedback?
		</span>
		<span class="success-text">
			Thanks for the message! We will get back to you soon.
		</span>
		<input type="text" placeholder="Name" class="name" />
		<input type="email" placeholder="Email" class="email" />
		<textarea placeholder="Write your message" class="message"></textarea>
		<div class="button action-feedback-popup-send">Send</div>
	</div>
	<style>
		.feedback-popup {
			position:fixed;
			border:2px solid #c6c2be;
			bottom:0;
			left:2em;
			margin:0;
			width:16em;
			text-align:left;
			padding:0.5em;
			padding-left:0.75em;
			padding-right:0.75em;
			z-index:1000;
			border-radius:5px;
			border-bottom-left-radius:0;
			border-bottom-right-radius:0;
			border-bottom:0;
			background:#fff;
			cursor:pointer;
			color:#c6c2be;
		}
		.feedback-popup * {
			display:none !important;
			box-sizing:border-box;
		}
		.feedback-popup .action-expand-feedback-popup {
			background:#c6c2be;
			border-radius:5px;
			padding:0.5em;
			color:#fff;
			font-size:10px;
			position:absolute;
			top:0.85em;
			right:0.85em;
			display:block !important;
		}
		.feedback-popup .title {
			display:block !important;
			color:#c6c2be;
			font-weight:bold;
		}
		.feedback-popup.expanded .title {
			color:#353535;
		}
		.feedback-popup .title:hover {
			text-decoration:underline;
		}
		.feedback-popup.expanded * {
			display:block !important;
		}
		.feedback-popup.expanded {
			cursor:normal;
			min-height:18em;
		}
		.feedback-popup .text {
			margin-top:15px;
			margin-bottom:5px;
			font-size:14px;
		}
		.feedback-popup input,
		.feedback-popup textarea {
			width:100% !important;
	    	border: 1px solid #e4e4e4 !important;
		    padding: 4px !important;
		    margin-bottom: 5px !important;
		    font-size: 14px !important;
		    border-radius: 5px !important;
			box-shadow:none !important;
			font-weight:normal !important;
			outline:none !important;
		}
		.feedback-popup textarea {
			min-height:7em;
		}
		.feedback-popup .button {
			float:right;
			font-weight:bold;
			padding:0.25em;
			padding-left:0.75em !important;
			padding-right:0.75em !important;
			border-radius:5px !important;
			background:#ff4742;
			border:2px solid #ff4742;
			color:#fff;
			margin-top:5px;
			text-transform:none !important;
		}
		.feedback-popup .button:hover {
			color:#ff4742;
			background:none;
		}
		.feedback-popup .success-text {
			font-size:14px;
			margin-top:15px;
			display:none !important;
		}
		.feedback-popup.success * {
			display:none !important;
		}
		.feedback-popup.success .fa,
		.feedback-popup.success .title,
		.feedback-popup.success .success-text {
			display:block !important;
		}
		.feedback-popup:not(.expanded) .success-text {
			display:none !important;
		}

		@media (max-width:600px) {
			.feedback-popup {
				display:none;
			}
		}
	</style>
	<script>
		$(function() {
			$('.feedback-popup .title').bind('click',function(e) {
				toggleFeedbackPopup();
				e.stopPropagation();
				e.preventDefault();
			});
			$('.feedback-popup').bind('click touchend',function() {
				if(!$(this).hasClass('expanded')) toggleFeedbackPopup();
			});
			$('.feedback-popup .action-expand-feedback-popup').bind('click',function() {
				toggleFeedbackPopup();
				e.stopPropagation();
				e.preventDefault();
			});
			function toggleFeedbackPopup() {
				$('.feedback-popup').toggleClass('expanded');
				if($('.feedback-popup').hasClass('expanded')) {
					$('.feedback-popup').removeClass('success');
					$('.feedback-popup input').val('');
					$('.feedback-popup textarea').val('');
					$('.feedback-popup .fa').removeClass('fa-chevron-up').addClass('fa-chevron-down');
				}
				else {
					$('.feedback-popup input').val('');
					$('.feedback-popup textarea').val('');
					$('.feedback-popup').removeClass('success');
					$('.feedback-popup .fa').addClass('fa-chevron-up').removeClass('fa-chevron-down');
				}
			}
			$('.feedback-popup .button').bind('click touchend',function() {
				if($('.feedback-popup .name').val().trim()=='' || $('.feedback-popup .email').val().trim()=='') {
					alert("Please complete all fields.");
					return;
				}
				if(!validateEmail($('.feedback-popup .email').val())) {
					alert("Please specify a valid email.");
					return;
				}
				$.ajax({
					url: "<?=$_SERVER['HTTPS'] ? 'https://' : 'http://';?><?=$_SERVER['HTTP_HOST']?>/feedback-popup.php",
					dataType:'json',
					type:'POST',
					data:{
						name:$('.feedback-popup .name').val(),
						email:$('.feedback-popup .email').val(),
						message:$('.feedback-popup .message').val()
					},
					context: document.body
				}).done(function(reply) {
					if(reply.success=='true' || reply.success==true) {
						$('.feedback-popup').addClass('success');
					}
					else {
						alert("Sorry, can't connect to the server right now");
					}
				});
			});
		});
		function validateEmail(email) {
		   var re = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
			return re.test(email);
		}
	</script>
<?}

if(!empty($_POST['message']) && !empty($_POST['name']) && !empty($_POST['email'])) {

	// send message
	require_once($config['pathToPHPMailer']);
	require_once($config['pathToPHPMailerSMTP']);

	$_POST['email']=strip_tags($_POST['email']);
	$_POST['name']=strip_tags(substr($_POST['name'],0,50));
	$_POST['message']=strip_tags(substr($_POST['message'],0,1000));

	$subject=$_SERVER['HTTP_HOST'].': '.$_POST['email'].' wrote you a note';
	$body=$_POST['message']."\n\n----
You received this message from a visitor

Name: ".$_POST['name']."

Email: ".$_POST['email']."

The visitor was on this page: ".($_SERVER['HTTPS'] ? 'https://' : 'http://').$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']."

Web Browser: ".$_SERVER['HTTP_USER_AGENT']."
IP Address: ".$_SERVER['REMOTE_ADDR']."
Location: ".$_SERVER['GEOIP_COUNTRY']."

";

	try {
		$mail=new PHPMailer(true); // create a new object
		$mail->isSMTP();
		$mail->SMTPDebug=0;
		$mail->IsHTML(false); 
		$mail->CharSet = 'UTF-8';
		$mail->SMTPAuth=true;
		$mail->SMTPSecure=$config['smtp']['server']['secure'];
		$mail->Host=$config['smtp']['hostname'];
		$mail->Port=$config['smtp']['port'];
		$mail->Username=$config['smtp']['username'];
		$mail->Password=$config['smtp']['password'];
		$mail->AddReplyTo(
			$_POST['email'],
			$_POST['name']
		);
		$mail->SetFrom(
			$config['toEmail'],
			$config['toName']
		);
		$mail->AddAddress(
			$config['toEmail'],
			$config['toName']
		);
		$mail->Subject=$subject;
		// $mail->AltBody=$body;
		// $mail->WordWrap=80;
		$mail->Body=$body;

		// <sent failed>
			if(!$mail->Send()) {
				echo json_encode(
					array(
						'success'=>false,
						'message'=>$mail->ErrorInfo()." ".json_encode($config)
					)
				);
				exit;
			}
		// </sent failed>

		// <sent succesfully>
			else {
				echo json_encode(array('success'=>true));
				exit;
			}
		// </sent succesfully>
	}
	catch (phpmailerException $e) {
		echo json_encode(array('success'=>false,'message'=>$e->getMessage()));
		exit;
	}
	catch (Exception $e) {
		echo json_encode(array('success'=>false,'message'=>$e->getMessage()));
		exit;
	}
}
?>

Good stuff, I like the "include as script" feature.
A few minor feedbacks:

• why is this in a gist and not in a repo? How is people supposed to contribute?
• the indentation is really, really wide! Oh wait, you use tabs, will skip the flame about space vs tabs :)
• Can you set the gist language to php, so we have syntax highlighing?
• Did you know happyfoxchat.com? It's free and I'm using it in my Elasticsearch plugin website

@sscarduzio

How is happyfoxchat.com free? There's a "free trial"

Short PHP tags won't work by default >= PHP 7.0

ubuntu@ip-172-31-28-157:~$ php -v
PHP 7.1.0-3+deb.sury.org~xenial+1 (cli) ( NTS )
Copyright (c) 1997-2016 The PHP Group
Zend Engine v3.1.0-dev, Copyright (c) 1998-2016 Zend Technologies
    with Zend OPcache v7.1.0-3+deb.sury.org~xenial+1, Copyright (c) 1999-2016, by Zend Technologies
    with Xdebug v2.5.0, Copyright (c) 2002-2016, by Derick Rethans
ubuntu@ip-172-31-28-157:~$ php -i | grep short_open_tag
short_open_tag => Off => Off

Hey, an important heads-up! On SMTP error it seems to me that it dumps your entire config to the user!

if(!$mail->Send()) {
	echo json_encode(
		array(
			'success'=>false,
			'message'=>$mail->ErrorInfo()." ".json_encode($config)
		)
	);
	exit;
}

Have you got the css for the custom olark form you made ?