combineify.php

<?php
    require dirname(__FILE__) . '/vendor/autoload.php';
    use MatthiasMullie\Minify;
    /************************************************************************
     * CSS and Javascript Combinator 0.6
     * Copyright 2006 by Niels Leenheer
     * Updated 2016 - d8ahazard
     */


    if (ini_get('max_execution_time')) {
	ini_set('max_execution_time', '300');
    }
    $cache = true;
    $cachedir = dirname(__FILE__) . '/cache';
    if ((!file_exists($cachedir)) && $cache) {
        mkdir($cachedir, 0777, true);
    }

    $type = $_GET['type'];
    $elements = explode(',', $_GET['files']);

    // Determine last modification date of the files
    $lastmodified = 0;
    while (list(,$element) = each($elements)) {
        $path = realpath($element);

        if (($type == 'javascript' && substr($path, -3) != '.js') ||
            ($type == 'css' && substr($path, -4) != '.css')) {
            header ("HTTP/1.0 403 Forbidden");
            exit;
        }

        if (!file_exists($path)) {
            header ("HTTP/1.0 404 Not Found");
            exit;
        }

        $lastmodified = max($lastmodified, filemtime($path));
    }

    // Send Etag hash
    $hash = $lastmodified . '-' . md5($_GET['files']);
    header ("Etag: \"" . $hash . "\"");

    if (isset($_SERVER['HTTP_IF_NONE_MATCH']) &&
        stripslashes($_SERVER['HTTP_IF_NONE_MATCH']) == '"' . $hash . '"')
    {
        // Return visit and no modifications, so do not send anything
        header ("HTTP/1.0 304 Not Modified");
        header ('Content-Length: 0');
    }
    else
    {
        // First time visit or files were modified
        if ($cache)
        {
            // Determine supported compression method
            $gzip = strstr($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip');
            $deflate = strstr($_SERVER['HTTP_ACCEPT_ENCODING'], 'deflate');

            // Determine used compression method
            $encoding = $gzip ? 'gzip' : ($deflate ? 'deflate' : 'none');

            // Check for buggy versions of Internet Explorer
            if (!strstr($_SERVER['HTTP_USER_AGENT'], 'Opera') &&
                preg_match('/^Mozilla\/4\.0 \(compatible; MSIE ([0-9]\.[0-9])/i', $_SERVER['HTTP_USER_AGENT'], $matches)) {
                $version = floatval($matches[1]);

                if ($version < 6)
                    $encoding = 'none';

                if ($version == 6 && !strstr($_SERVER['HTTP_USER_AGENT'], 'EV1'))
                    $encoding = 'none';
            }

            // Try the cache first to see if the combined files were already generated
            $cachefile = 'cache-' . $hash . '.' . $type . ($encoding != 'none' ? '.' . $encoding : '');

            if (file_exists($cachedir . '/' . $cachefile)) {
                if ($fp = fopen($cachedir . '/' . $cachefile, 'rb')) {

                    if ($encoding != 'none') {
                        header ("Content-Encoding: " . $encoding);
                    }

                    header ("Content-Type: text/" . $type);
                    header ("Content-Length: " . filesize($cachedir . '/' . $cachefile));

                    fpassthru($fp);
                    fclose($fp);
                    exit;
                }
            }
        }

        // Get contents of the files
        $contents = '';
        reset($elements);
        if ($type == 'css') {
            $minifier = new Minify\CSS();
        }
        if ($type =='javascript') {
            $minifier = new Minify\JS();
        }
        while (list(,$element) = each($elements)) {
            $path = realpath($element);
            $minifier->add($path);
        }

        $contents = $minifier->minify();


        // Send Content-Type
        header ("Content-Type: text/" . $type);
        header('Expires: '.gmdate('D, d M Y H:i:s \G\M\T', time() + (60 * 60 * 24 * 360))); // 30 days
        if (isset($encoding) && $encoding != 'none')
        {
            // Send compressed contents
            $contents = gzencode($contents, 9, $gzip ? FORCE_GZIP : FORCE_DEFLATE);
            header ("Content-Encoding: " . $encoding);
            header ('Content-Length: ' . strlen($contents));
            echo $contents;
        }
        else
        {
            // Send regular contents
            header ('Content-Length: ' . strlen($contents));
            echo $contents;
        }

        // Store cache
        if ($cache) {
			$cacheString = $cachedir."/*".$type.".gzip";
			foreach (glob($cacheString) as $file) {	
				unlink($file);
			}
			
			if ($fp = fopen($cachedir . '/' . $cachefile, 'wb')) {
                fwrite($fp, $contents);
                fclose($fp);
            }
        }
    }
?>