Create a system for minifying js (and optionally joining files)

[joseluis]

• https://github.com/tedious/JShrink (php)
• https://code.google.com/p/minify/ (php)
  • https://code.google.com/p/minify/source/browse/min/lib/JSMin.php
• https://github.com/promatik/PHP-JS-CSS-Minifier (uses an online service)

Implement it with a cache system

• http://stackoverflow.com/a/11922569/940200
• http://stackoverflow.com/a/11000599/940200

e.g. 1

<?php
$js = file_get_contents($_GET['f']);
$md = md5($js); // you can use sth faster, such as date comparsion
if (file_exists('cache/'.$md.'.js')) {
  echo file_get_contents('cache/'.$md.'.js');
} else {
  $min = yourJsMinifierFunc($js);
  file_put_contents('cache/'.$md.'.js', $min);
  echo $min;
}

e.g. 2:

require 'JShrink/Minifier.php';

if(filemtime('scripts_template.js') < filemtime('scripts_template.min.js') {
  readfile('scripts_template.min.js');
} else {
  $output = \JShrink\Minifier::minify(file_get_contents('scripts_template.js'));
  file_put_contents('scripts_template.min.js', $output);
  echo $output;
}