haliphax

While CodeIgniter provides a disk caching mechanism, it lacks a browser caching mechanism. Without a lengthy introduction, here's one.

Browsercache.php

<?php if(! defined('BASEPATH')) exit();

class Browsercache
{
	private $ci;

	function __construct()
	{
		$this->ci =& get_instance();
	}

	public function cacheFor($minutes)
	{
		$this->ci->output->cache($minutes);
		$this->ci->output->set_header(sprintf('Expires: %s GMT', gmdate('D, d M Y H:i:s', time() + ($minutes \* 60))));
	}

	public function dontCache()
	{
		$this->ci->output->set_header('Cache-Control: no-store, no-cache, must-revalidate');
		$this->ci->output->set_header('Cache-Control: post-check=0, pre-check=0', false);
		$this->ci->output->set_header('Pragma: no-cache');
	}
}

Throw that in your application/libraries folder, and use it like so:

• Cache a page for 30 minutes: $this->browsercache->cacheFor(30);
• Prevent a page from being cached: $this->browsercache->dontCache();

Yup. That's it. Use it wherever you want to.

I've also created a gist for it on GitHub.