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    <p>You can do this like this:</p> <p>The concept is quite easy, but you may make it a bit more advanced</p> <p><strong>Step 1:</strong> merging the file</p> <pre><code>&lt;?php $scripts = $_GET['script']; $contents = ""; foreach ($scripts as $script) { // validate the $script here to prevent inclusion of arbitrary files $contents .= file_get_contents($pathto . "/" . $script); } // post processing here // eg. jsmin, google closure, etc. echo $contents(); ?&gt; </code></pre> <p><strong>usage</strong>: </p> <pre><code>&lt;script src="js.php?script[]=jquery.js&amp;script[]=otherfile.js" type="text/javascript"&gt;&lt;/script&gt; </code></pre> <p><strong>Step 2:</strong> caching</p> <pre><code>&lt;?php function cacheScripts($scriptsArray,$outputdir) { $filename = sha1(join("-",$scripts) . ".js"; $path = $outputdir . "/" . $filename; if (file_exists($path)) { return $filename; } $contents = ""; foreach ($scripts as $script) { // validate the $script here to prevent inclusion of arbitrary files $contents .= file_get_contents($pathto . "/" . $script); } // post processing here // eg. jsmin, google closure, etc. $filename = sha1(join("-",$scripts) . ".js"; file_write_contents( , $contents); return $filename; } ?&gt; &lt;script src="/js/&lt;?php echo cacheScripts(array('jquery.js', 'myscript.js'),"/path/to/js/dir"); ?&gt;" type="text/javascript"&gt;&lt;/script&gt; </code></pre> <p>This makes it a bit more advanced. Please note, this is semi-pseudo code to explain the concepts. In practice you will need to do more error checking and you need to do some cache invalidation.</p> <p>To do this is a more managed and automated way, there's assetic (if you may use php 5.3):</p> <p><a href="https://github.com/kriswallsmith/assetic" rel="nofollow">https://github.com/kriswallsmith/assetic</a></p> <p>(Which more or less does this, but much better)</p> <p><strong>Assetic</strong> Documentation <a href="https://github.com/kriswallsmith/assetic/blob/master/README.md" rel="nofollow">https://github.com/kriswallsmith/assetic/blob/master/README.md</a></p> <p>The workflow will be something along the lines of this: <pre><code>use Assetic\Asset\AssetCollection; use Assetic\Asset\FileAsset; use Assetic\Asset\GlobAsset; $js = new AssetCollection(array( new GlobAsset('/path/to/js/*'), new FileAsset('/path/to/another.js'), )); // the code is merged when the asset is dumped echo $js-&gt;dump(); </code></pre> <p>There is a lot of support for many formats:</p> <ul> <li>js</li> <li>css</li> <li>lot's of minifiers and optimizers (css,js, png, etc.)</li> <li>Support for sass, <a href="http://sass-lang.com/" rel="nofollow">http://sass-lang.com/</a></li> </ul> <p>Explaining everything is a bit outside the scope of this question. But feel free to open a new question!</p>
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    1. COI was about to ask how to cache. Seems you knew what was on my mind. I particularly like the last line of your script. Looks interesting. Thanks.
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    2. COHave a look at assetic, it might bit a bit difficult to implement at first but it will save you a lot of time to create something similar yourself.
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    3. COHow do I use it? If you can compose just a short explanation, could you mail it to afaolek@gmail.com? I already downloaded it.
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