Viviki: QR Code + Logo Generator that accepts a form_id and entry_id parameter and creates a QRCode Link from that.

index.php

<?php
	/**
	 * QR Code + Logo Generator
	 *
	 * Description: Accepts a form_id and entry_id parameter and creates a QRCode Link from that. 
	 * Author: Ano Tisam
	 * Email: an0tis@gmail.com
	 * Orginal: https://gist.github.com/NTICompass/1283249
	 */

	define("DOMAIN","https://www.govcrate.com/forms/v6/view_entry.php");
	if(isset($_GET["form_id"]) && isset($_GET["entry_id"])){

		createQRCode($_GET["form_id"], $_GET["entry_id"]);

	}
	else{
		header('Content-type: application/json');
		echo json_encode(array("error" => "Error, make sure form_id and entry_id parameters are set."));
	}

	function createQRCode($form_id, $entry_id ){

		$data 		= DOMAIN . "?form_id={$form_id}&entry_id={$entry_id}";
		$size 		= isset($_GET['size']) ? $_GET['size'] : '256x256';
		$logo 		= isset($_GET['logo']) ? $_GET['logo'] : 'logo.png';

		header('Content-type: image/png');
		$QR = imagecreatefrompng('https://chart.googleapis.com/chart?cht=qr&chld=H|1&chs='.$size.'&chl='.urlencode($data));
		if($logo !== FALSE){
			$logo = imagecreatefromstring(file_get_contents($logo));
			$QR_width = imagesx($QR);
			$QR_height = imagesy($QR);
			
			$logo_width = imagesx($logo);
			$logo_height = imagesy($logo);
			
			// Scale logo to fit in the QR Code
			$logo_qr_width = $QR_width/3;
			$scale = $logo_width/$logo_qr_width;
			$logo_qr_height = $logo_height/$scale;
			
			imagecopyresampled($QR, $logo, $QR_width/3, $QR_height/3, 0, 0, $logo_qr_width, $logo_qr_height, $logo_width, $logo_height);
		}
		imagepng($QR);
		imagedestroy($QR);
	}
?>