php 生成和清除缓存

 生成缓存：

<?php
    if($_GET['phphuancun']!="true") {
        define("HC_PATH",dirname(__FILE__)."/cache/");
        define("HC_TIME",1);
        echo HC_getcache();exit;
    }

    function HC_getcache($iscache='') {
        $url="http://".$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI'];
        $cacheurl=strpos($url,"?")?$url."&phphuancun=true":$url."?phphuancun=true";
        $cachename=HC_PATH.md5($url).".c";

        $cachetime=$iscache?time()+1:time()-(HC_TIME * 60*60);
        if(file_exists($cachename) && filemtime($cachename)>=$cachetime) {
            $return=file_get_contents($cachename);
            $data=function_exists(gzcompress)?@gzuncompress($return):$return;
            return unserialize($data);
        } else {
            $return=file_get_contents($cacheurl);
            HC_writecache($cachename,$return);
            return $return;
        }
    }

    function HC_writecache($name,$array) {
        function_exists(gzcompress)?$return =gzcompress(serialize($array)):$return=serialize($array);
        @file_put_contents($name,$return);
    }
?>

 

 清除缓存：

<?php
header("content-Type: text/html; charset=utf-8");
//配置开始
$path="huancun/cache";//在些设置所删除的目录.为当前目录 如：删除path目录，引号里请添path;
$guolv="del.php,huancun.php,huancun";//设置需要过滤的文件或文件夹用英文状态下,号分隔
//配置结束
if($_GET['action']=="del"){
    $file= array_values_recursive(recurdir($path,$guolv));
    foreach($file as $k => $v){
        remove_directory($v);
    }
}else{
    echo "您的配置如下<br>
    要删除的目录为：
    ";
    if($path==".")echo "当前目录";else echo $path;
    echo "<br>您要过滤的文件或文件夹有：".$guolv."<br>
    如果确认过滤请<a href='?action=del'>点击此处开始删除相应的目录及目录下的所有文件</a>，如果配置不正确请到文件中修改
    ";
}


//删除目录及文件
function remove_directory($dir) {
  foreach(glob($dir) as $fn) {
        echo " removing $fn<br>\n";
        if (!is_writable($fn))@chmod($fn, 0777);
        if(is_dir($fn)){@rmdir($fn);}else{@unlink($fn);}
   }
}
//扫描目录
function recurdir($pathname,$guolv='del.php')
{
    $result=array();$temp=array();
    //检查目录是否有效和可读
    if(!is_dir($pathname) || !is_readable($pathname))
    return null;
    //得到目录下的所有文件夹
    $allfiles=scandir($pathname);
    foreach($allfiles as $key => $filename)
    {
        //如果是“.”或者“..”的话则略过
        if(in_array($filename,array('.','..')))continue;
        if(count($guolv)>0){$lv=explode(",",$guolv);if(in_array($filename,$lv))continue;}

        //得到文件完整名字
        $fullname =$pathname . "/" .$filename;
        //如果该文件是目录的话，递归调用recurdir
        $temp[]=$fullname;
        if(is_dir($fullname)){
            $nowpath=explode("/",$fullname);
            if(count($guolv)>0){$lv=explode(",",$guolv);if(in_array($nowpath[count($nowpath)-1],$lv))continue;}
            $result[$filename] = recurdir($fullname);}
    }
    //最后把临时数组中的内容添加到结果数组，确保目录在前，文件在后
    foreach($temp as $f){
        $result[]=$f;
    }
    return $result;
}
//获取所有文件
function array_values_recursive($ary)
{
   $lst = array();
   foreach( array_keys($ary) as $k ){
     $v = $ary[$k];
     if (is_array($v)) {$lst = array_merge( $lst, array_values_recursive($v));}else{$lst[] = $v;}
   }
   return $lst;
}
?>