Pastable version of Cache any PHP function

<pre class='prettyprint' language='php'>function cache_function($buildCallback, array $args= array (), $timeoutMinutes= 60) {
	if (is_array($buildCallback)) {
		$cacheKey= get_class($buildCallback[0]) . $buildCallback[1] . ':' . implode(':', $args);
	} else
		$cacheKey= $buildCallback . ':' . implode(':', $args);

$file_path= CACHE_PATH . md5($cacheKey);
	@ $file_time= filemtime($file_path);
	$rebuild= $file_time &lt; time() - ($timeoutMinutes * 60);

//$rebuild= false; // FORCE REBUILD SKIP for WINDOWS

if ($rebuild or (!$rebuild and !is_readable($file_path))) {
		$build= call_user_func_array($buildCallback, $args);
		file_put_contents($file_path, serialize($build), LOCK_EX);
		return $build;
	}
	return unserialize(file_get_contents($file_path));
}</pre>
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Pastable version of Cache any PHP function