84 lines
2.4 KiB
PHP
84 lines
2.4 KiB
PHP
<?php
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/** DomFramework
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* @package domframework
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* @author Dominique Fournier <dominique@fournier38.fr>
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* @license BSD
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*/
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namespace Domframework;
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/** This class permit to cache the ouptut of a code. If the cache is already
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* available, use it.
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* It resend the headers as the ouptut send them
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* Use it by :
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* $c = new Cacheoutput ("URL");
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* Don't forget to define a variable or the cache saved is always empty
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*/
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class Cacheoutput
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{
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/** Record if the saving of pages is on going */
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private $saving = false;
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/** The called id */
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private $id = null;
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/** The called ttl */
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private $ttl = null;
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/** The cache object */
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private $cache = null;
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/** Current path at start due to lack of information in __destruct*/
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private $cacheCWD = null;
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/**
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@param string $id The cache identifier
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@param integer|null $ttl The cache Time to Leave in seconds (60s by
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default)
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@param string|null $method The cache method to use */
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public function __construct($id, $ttl = 60, $method = "file")
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{
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$res = @include("domframework/cache$method.php");
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if ($res === false) {
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throw new \Exception(
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sprintf(dgettext(
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"domframework",
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"Unkwnown cache method : "
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), $method),
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500
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);
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}
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$this->id = $id;
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$this->ttl = $ttl;
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$this->cacheCWD = getcwd();
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$cachemethod = "Cache$method";
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$this->cache = new $cachemethod();
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if ($ttl === 0) {
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$this->cache->nocache = 1;
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}
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$res = $this->cache->read($id);
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// If there is a cache : display it
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if ($res !== false) {
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foreach ($res["headers"] as $header) {
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@header($header);
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}
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echo $res["content"];
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exit;
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}
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ob_start();
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$this->saving = true;
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// The data are sent automatically
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}
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/** End of saving the data in cache */
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public function __destruct()
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{
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// Force the path because it return to / in the destructor
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chdir($this->cacheCWD);
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if ($this->saving === true) {
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// Do the saving of the data
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$data = array("content" => ob_get_contents(),
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"headers" => headers_list());
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$this->cache->write($this->id, $data, $this->ttl);
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}
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}
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}
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