Dominique Fournier
c283362d05
git-svn-id: https://svn.fournier38.fr/svn/ProgSVN/trunk@2512 bf3deb0d-5f1a-0410-827f-c0cc1f45334c
69 lines
2.0 KiB
PHP
69 lines
2.0 KiB
PHP
<?php
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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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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 (sprintf (dgettext("domframework",
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"Unkwnown cache method : "), $method),
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500);
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$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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$this->cache->nocache = 1;
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$res = $this->cache->read ($id);
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// If there is a cache : display it
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if ($res !== false)
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{
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foreach ($res["headers"] as $header)
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@header ($header);
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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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{
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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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