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想找一下PHP缓存请求方面的内容，然后 bing 一下，找到一个........
哇塞，发现是自己的文章，被偷偷转发了.................
自己有过的设计都忘记了.........
好吧，就看看自己过去的代码............

缓存那里好像少了点东西，只能缓存一个请求，忘记了追加请求的文件做标识，修正。
然后发现，缓存了全部请求参数做标识，追加了一个 only 函数来，指定哪些参数可以做标识。

test.php的源码：

MZCRequestCache.class.php 源码：

<?php
class MZCRequestCache {
    var $dirName;
    var $isDirHere;
    var $requestAPI;
    var $requestBodyMD5;
    
    function __construct() {
        $this->requestAPI = '';
        $this->requestAPI = $_SERVER["PHP_SELF"];
        $this->requestAPI = str_replace('/', '__', $this->requestAPI);
        $this->requestAPI = str_replace('.', '_', $this->requestAPI);
//      echo("API：[" . $this->requestAPI."]<br>");
        
        
        $this->requestBody = '';
        if ($_POST) {
            $this->requestBody = file_get_contents('php://input', 'r'); 
        } else {
            $this->requestBody = $_SERVER["QUERY_STRING"];  
        }
        
//      echo("请求体：[" . $this->requestBody."]<br>");
        
        $this->requestBodyMD5 = '';
        $targetString = $this->requestAPI . '?'. $this->requestBody;
        $this->requestBodyMD5 = md5($targetString);
        
        $this->dirName = 'requestCache';
        $this->isDirHere = FALSE;
        if (is_dir($this->dirName)) {
            //echo '<br/>requestCache dir here!';
            $this->isDirHere = TRUE;
        } else {
            //echo '<br/>requestCache dir no here!';
            if (mkdir($this->dirName)) {
                //echo '<br/>requestCache create scuess!';
                $this->isDirHere = TRUE;
            } else {
                //echo '<br/>requestCache create fail!!';
                $this->isDirHere = FALSE;
            }
        }
    }
    
    
    function only($arr = []) {
        if (is_array($arr) == FALSE) {
            return;
        }
        $keepArray = array();
        
        foreach($arr as $x=>$x_value) {
            $requestBodyArray = explode('&',$this->requestBody);
            foreach($requestBodyArray as $y=>$y_value) {
                $tempArray = explode('=',$y_value);
                if (is_array($tempArray)) {
                    if (strcmp($x_value, $tempArray[0]) == 0) {
                        $keepArray[$tempArray[0]] = $tempArray[1];
                    }
                }
            }
        }
        
        $keepArray2 = array();
        $index = 0;
        foreach($keepArray as $as=>$as_value) {
            $keepArray2[$index] = $as.'='.$as_value;
            $index++;
        }
        $targetString = implode('&',$keepArray2);
        $targetString2 = $this->requestAPI . '?'. $targetString;
        
        $this->requestBodyMD5 = '';
        $this->requestBodyMD5 = md5($targetString2);
       // echo('$targetString2 > ['.$targetString2.']<br>');
    }
    
    /*获取缓存*/
    function getCache() {
        if ($this->isDirHere) {
            $cacheDir = $this->dirName.'/'.$this->requestAPI;
            
            $isCacheDirHere = FALSE;
            if (is_dir($cacheDir)) {
                $isCacheDirHere = TRUE;
            }
            
            if ($isCacheDirHere) {
                $path = $this->dirName.'/'.$this->requestAPI.'/'.$this->requestBodyMD5;
                $content = file_get_contents($path);
                return $content;
            }
        }
    }
    
    /*判断是否有缓存*/
    function haveCache() {
        //echo '<br/>$isDirHere-->'.$this->isDirHere;
        if ($this->isDirHere) {
            //echo '<br/>$requestBodyMD5-->'.$this->requestBodyMD5;
            $path = $this->dirName.'/'.$this->requestAPI.'/'.$this->requestBodyMD5;
            //echo '<br/>$path--->'.$path;
            if (file_exists($path)) {
                return TRUE;
            }
        }
        return FALSE;
    }
    /*清除缓存*/
    function removeCache() {
        if ($this->isDirHere) {
            $cacheDir = $this->dirName.'/'.$this->requestAPI;
            return $this->deldir($cacheDir);
        }
        return FALSE;
    }
    /*清除指定的缓存*/
    function removeCache1($requestAPI) {
        if ($this->isDirHere) {
            $cacheDir = $this->dirName.'/'.$requestAPI;
            return $this->deldir($cacheDir);
        }
        return FALSE;
    }
    /*创建缓存*/
    function createCache($content) {
        if ($this->isDirHere) {
            $cacheDir = $this->dirName.'/'.$this->requestAPI;
            
            $isCacheDirHere = FALSE;
            if (is_dir($cacheDir)) {
                $isCacheDirHere = TRUE;
            } else {
                if (mkdir($cacheDir)) {
                    $isCacheDirHere = TRUE;
                } else {
                    $isCacheDirHere = FALSE;
                }
            }
            
            if ($isCacheDirHere) {
                $path = $this->dirName.'/'.$this->requestAPI.'/'.$this->requestBodyMD5;
                
                $fh = fopen($path, "a");
                fwrite($fh, $content);
                fclose($fh);
            }
        }
    }

    function deldir($dir) {
        //先删除目录下的文件：
        $dh=opendir($dir);
        while ($file=readdir($dh)) {
            if($file!="." && $file!="..") {
                $fullpath=$dir."/".$file;
                if(!is_dir($fullpath)) {
                    unlink($fullpath);
                } else {
                    deldir($fullpath);
                }
            }
        }
        
        closedir($dh);
        //删除当前文件夹：
        if (rmdir($dir)) {
            return true;
        } else {
            return false;
        }
    }
    
    //选择数据库
    //实现类的函数的重载
    function __call($name, $args) {
        $isOK = false;

        if ($name == 'removeCache') {
            $isOK = true;
        }

        if ($isOK) {
            $i = count($args);
            if (method_exists($this, $f = $name . $i)) {
                call_user_func_array(array($this, $f), $args);
            }
        }
    }
}
?>