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Current Path : /proc/thread-self/root/usr/local/lib/php-5.3.13/lib/php/Cache/Lite/
Linux boscustweb5005.eigbox.net 5.4.91 #1 SMP Wed Jan 20 18:10:28 EST 2021 x86_64
Current File : //proc/thread-self/root/usr/local/lib/php-5.3.13/lib/php/Cache/Lite/Function.php
<?php

/**
* This class extends Cache_Lite and can be used to cache the result and output of functions/methods
*
* This class is completly inspired from Sebastian Bergmann's
* PEAR/Cache_Function class. This is only an adaptation to
* Cache_Lite
*
* There are some examples in the 'docs/examples' file
* Technical choices are described in the 'docs/technical' file
*
* @package Cache_Lite
* @version $Id: Function.php 225008 2006-12-14 12:59:43Z cweiske $
* @author Sebastian BERGMANN <sb@sebastian-bergmann.de>
* @author Fabien MARTY <fab@php.net>
*/

require_once('Cache/Lite.php');

class Cache_Lite_Function extends Cache_Lite
{

    // --- Private properties ---

    /**
     * Default cache group for function caching
     *
     * @var string $_defaultGroup
     */
    var $_defaultGroup = 'Cache_Lite_Function';

    /**
     * Don't cache the method call when its output contains the string "NOCACHE"
     *
     * if set to true, the output of the method will never be displayed (because the output is used
     * to control the cache)
     *
     * @var boolean $_dontCacheWhenTheOutputContainsNOCACHE
     */
    var $_dontCacheWhenTheOutputContainsNOCACHE = false;

    /**
     * Don't cache the method call when its result is false
     *
     * @var boolean $_dontCacheWhenTheResultIsFalse
     */
    var $_dontCacheWhenTheResultIsFalse = false;

    /**
     * Don't cache the method call when its result is null
     *
     * @var boolean $_dontCacheWhenTheResultIsNull
     */
    var $_dontCacheWhenTheResultIsNull = false;

    /**
     * Debug the Cache_Lite_Function caching process
     *
     * @var boolean $_debugCacheLiteFunction
     */
    var $_debugCacheLiteFunction = false;

    // --- Public methods ----

    /**
    * Constructor
    *
    * $options is an assoc. To have a look at availables options,
    * see the constructor of the Cache_Lite class in 'Cache_Lite.php'
    *
    * Comparing to Cache_Lite constructor, there is another option :
    * $options = array(
    *     (...) see Cache_Lite constructor
    *     'debugCacheLiteFunction' => (bool) debug the caching process,
    *     'defaultGroup' => default cache group for function caching (string),
    *     'dontCacheWhenTheOutputContainsNOCACHE' => (bool) don't cache when the function output contains "NOCACHE",
    *     'dontCacheWhenTheResultIsFalse' => (bool) don't cache when the function result is false,
    *     'dontCacheWhenTheResultIsNull' => (bool don't cache when the function result is null
    * );
    *
    * @param array $options options
    * @access public
    */
    function Cache_Lite_Function($options = array(NULL))
    {
        $availableOptions = array('debugCacheLiteFunction', 'defaultGroup', 'dontCacheWhenTheOutputContainsNOCACHE', 'dontCacheWhenTheResultIsFalse', 'dontCacheWhenTheResultIsNull');
        while (list($name, $value) = each($options)) {
            if (in_array($name, $availableOptions)) {
                $property = '_'.$name;
                $this->$property = $value;
            }
        }
        reset($options);
        $this->Cache_Lite($options);
    }

    /**
    * Calls a cacheable function or method (or not if there is already a cache for it)
    *
    * Arguments of this method are read with func_get_args. So it doesn't appear
    * in the function definition. Synopsis :
    * call('functionName', $arg1, $arg2, ...)
    * (arg1, arg2... are arguments of 'functionName')
    *
    * @return mixed result of the function/method
    * @access public
    */
    function call()
    {
        $arguments = func_get_args();
        $id = $this->_makeId($arguments);
        $data = $this->get($id, $this->_defaultGroup);
        if ($data !== false) {
            if ($this->_debugCacheLiteFunction) {
                echo "Cache hit !\n";
            }
            $array = unserialize($data);
            $output = $array['output'];
            $result = $array['result'];
        } else {
            if ($this->_debugCacheLiteFunction) {
                echo "Cache missed !\n";
            }
            ob_start();
            ob_implicit_flush(false);
            $target = array_shift($arguments);
            if (is_array($target)) {
                // in this case, $target is for example array($obj, 'method')
                $object = $target[0];
                $method = $target[1];
                $result = call_user_func_array(array(&$object, $method), $arguments);
            } else {
                if (strstr($target, '::')) { // classname::staticMethod
                    list($class, $method) = explode('::', $target);
                    $result = call_user_func_array(array($class, $method), $arguments);
                } else if (strstr($target, '->')) { // object->method
                    // use a stupid name ($objet_123456789 because) of problems where the object
                    // name is the same as this var name
                    list($object_123456789, $method) = explode('->', $target);
                    global $$object_123456789;
                    $result = call_user_func_array(array($$object_123456789, $method), $arguments);
                } else { // function
                    $result = call_user_func_array($target, $arguments);
                }
            }
            $output = ob_get_contents();
            ob_end_clean();
            if ($this->_dontCacheWhenTheResultIsFalse) {
                if ((is_bool($result)) && (!($result))) {
                    echo($output);
                    return $result;
                }
            }
            if ($this->_dontCacheWhenTheResultIsNull) {
                if (is_null($result)) {
                    echo($output);
                    return $result;
                }
            }
            if ($this->_dontCacheWhenTheOutputContainsNOCACHE) {
                if (strpos($output, 'NOCACHE') > -1) {
                    return $result;
                }
            }
            $array['output'] = $output;
            $array['result'] = $result;
            $this->save(serialize($array), $id, $this->_defaultGroup);
        }
        echo($output);
        return $result;
    }

    /**
    * Drop a cache file
    *
    * Arguments of this method are read with func_get_args. So it doesn't appear
    * in the function definition. Synopsis :
    * remove('functionName', $arg1, $arg2, ...)
    * (arg1, arg2... are arguments of 'functionName')
    *
    * @return boolean true if no problem
    * @access public
    */
    function drop()
    {
        $id = $this->_makeId(func_get_args());
        return $this->remove($id, $this->_defaultGroup);
    }

    /**
    * Make an id for the cache
    *
    * @var array result of func_get_args for the call() or the remove() method
    * @return string id
    * @access private
    */
    function _makeId($arguments)
    {
        $id = serialize($arguments); // Generate a cache id
        if (!$this->_fileNameProtection) {
            $id = md5($id);
            // if fileNameProtection is set to false, then the id has to be hashed
            // because it's a very bad file name in most cases
        }
        return $id;
    }

}

?>
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