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 * @example
 * require 'MyCache.class.php';
 * $mc = new MyCache("./test/cache");
 * $a = "hello world111";
 * $mc->set("ss", $a);
 * $mc->set("dd", $mc);
 * $mc->set("2s", $a);
 * echo $mc->get("ss");
 * $mc->delete("2s");
 * $mc->edit("ss", "hello");
 * echo $mc->get_type("dd");
 * echo "<pre>";
 * print_r($c);
<?php
/**
* ×ÔÓõÄphp »º´æÀà
* ¹¦ÄÜ,½«±äÁ¿£¬Êý×é дÈë Îļþ
* ÎļþÃû¼´Îª»º´æ±äÁ¿Ãû
* @example
* require 'MyCache.class.php';
* $mc = new MyCache("./test/cache");
* $a = "hello world111";
* $mc->set("ss", $a);
* $mc->set("dd", $mc);
* $mc->set("2s", $a);
* echo $mc->get("ss");
* echo $mc->get_type("dd");
* $c = $mc->get_all();
* echo "<pre>";
* print_r($c);
* @author: bruce wang 2010 - 03 - 08
* @name: MyCache.class.php
*/
class MyCache {
private $cachePath;//»º´æÄ¿Â¼
private $lifeTime;//»º´æÓÐЧʱ¼ä
private $pathSeq;//µ±Ç°ÏµÍ³µÄ·Ö¸ô·û
/**
* ¹¹Ô캯Êý£¬³õʼ»¯
* @param : string 'cachePath', 'lifeTime'
* @return null
*/

function MyCache($cachePath = "dataCache", $lifeTime = 0){
//Åжϻº´æÎļþ¼ÐÊÇ·ñ´æÔÚ£¬·ñÔò´´½¨
$this->create_dirs($cachePath);

$this->pathSeq = DIRECTORY_SEPARATOR;
$this->lifeTime = $lifeTime;
$this->cachePath = realpath($cachePath);
}


/**
* ´´½¨»º´æÎļþ²¢Ð´ÈëÊý¾Ý
* @param:string $var ±äÁ¿Ãû
* @param: mixed $data ±äÁ¿Êý¾Ý
* @return null
*/
function set($var, $data){
$fileFullName = $this->get_full_name($var);
if(!file_exists($fileFullName)){
$this->write_cache_file($var, $data);
}
else{
if(!$this->is_file_live($var)){//²»ÔÚÓÐЧÆÚ
unlink($fileFullName);//ɾ³ý²»ÔÚÓÐЧÆÚµÄ»º´æÎļþ
$this->write_cache_file($var, $data);


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$a="hello"; 
$b=&$a;
unset($b);
$b="world"; 
echo $a;
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