131 lines
4.4 KiB
PHP
131 lines
4.4 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Cache
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* @subpackage Zend_Cache_Frontend
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* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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/**
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* @see Zend_Cache_Core
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*/
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require_once 'Zend/Cache/Core.php';
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/**
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* @package Zend_Cache
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* @subpackage Zend_Cache_Frontend
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* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Cache_Frontend_Function extends Zend_Cache_Core
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{
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/**
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* This frontend specific options
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*
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* ====> (boolean) cache_by_default :
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* - if true, function calls will be cached by default
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*
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* ====> (array) cached_functions :
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* - an array of function names which will be cached (even if cache_by_default = false)
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*
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* ====> (array) non_cached_functions :
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* - an array of function names which won't be cached (even if cache_by_default = true)
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*
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* @var array options
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*/
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protected $_specificOptions = array(
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'cache_by_default' => true,
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'cached_functions' => array(),
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'non_cached_functions' => array()
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);
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/**
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* Constructor
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*
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* @param array $options Associative array of options
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* @return void
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*/
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public function __construct(array $options = array())
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{
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while (list($name, $value) = each($options)) {
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$this->setOption($name, $value);
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}
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$this->setOption('automatic_serialization', true);
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}
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/**
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* Main method : call the specified function or get the result from cache
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*
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* @param string $name Function name
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* @param array $parameters Function parameters
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* @param array $tags Cache tags
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* @param int $specificLifetime If != false, set a specific lifetime for this cache record (null => infinite lifetime)
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* @param int $priority integer between 0 (very low priority) and 10 (maximum priority) used by some particular backends
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* @return mixed Result
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*/
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public function call($name, $parameters = array(), $tags = array(), $specificLifetime = false, $priority = 8)
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{
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$cacheBool1 = $this->_specificOptions['cache_by_default'];
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$cacheBool2 = in_array($name, $this->_specificOptions['cached_functions']);
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$cacheBool3 = in_array($name, $this->_specificOptions['non_cached_functions']);
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$cache = (($cacheBool1 || $cacheBool2) && (!$cacheBool3));
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if (!$cache) {
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// We do not have not cache
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return call_user_func_array($name, $parameters);
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}
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$id = $this->_makeId($name, $parameters);
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if ($this->test($id)) {
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// A cache is available
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$result = $this->load($id);
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$output = $result[0];
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$return = $result[1];
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} else {
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// A cache is not available
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ob_start();
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ob_implicit_flush(false);
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$return = call_user_func_array($name, $parameters);
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$output = ob_get_contents();
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ob_end_clean();
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$data = array($output, $return);
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$this->save($data, $id, $tags, $specificLifetime, $priority);
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}
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echo $output;
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return $return;
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}
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/**
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* Make a cache id from the function name and parameters
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*
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* @param string $name Function name
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* @param array $parameters Function parameters
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* @throws Zend_Cache_Exception
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* @return string Cache id
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*/
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private function _makeId($name, $parameters)
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{
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if (!is_string($name)) {
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Zend_Cache::throwException('Incorrect function name');
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}
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if (!is_array($parameters)) {
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Zend_Cache::throwException('parameters argument must be an array');
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}
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return md5($name . serialize($parameters));
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}
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}
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