bo! hu? co.

Today Google released their new Closure Compiler, you can use it to optimize and minify your javascripts.

Now i show you how to use the new Google Closure Compiler over the RESTful API with PHP5. First of all, you don’t need to install anything, we will connect the free API via cURL usually activated in PHP5.

The API (see reference) resides under the following URL and requires four params:

http://closure-compiler.appspot.com/compile

compilation_level
is one of three options: WHITESPACE_ONLY, SIMPLE_OPTIMIZATIONS, ADVANCED_OPTIMIZATIONS,
i use simple optimizations, it don't need further config (like advanced) but is
better than whitespace only.

output_format
is "text" if you want compile a javascript

output_info
is "compiled_code" if you want compile a javascript

js_code
is your javascript source code, instead you can submit "code_url" param, an url
to a javascript-file

 

enough with theory, now the PHP code:

$script = file_get_contents('http://www.domain.com/scripts/script.js');
$ch = curl_init('http://closure-compiler.appspot.com/compile');

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, 'output_info=compiled_code&output_format=text&compilation_level=SIMPLE_OPTIMIZATIONS&js_code=' . urlencode($script));
$output = curl_exec($ch);
curl_close($ch);

i use it in a deployer script and replace the content of my script files with the compiled versions. you can tryout the compiler with a simple html-form.