APP 接口开发及读取静态缓存

 <?php
 /**
  * Description: App 接口
  * Create date:2015-10-19 13:36
  * Author: zhaoyingnan
  **/
 class Response
 {
     /**
      * 综合方式
      * @author  zhaoyingnan 2015-10-19 11:24
      * @param   int         $iCode  状态码
      * @param   string      $sMsg   提示信息
      * @param   mix         $mixData    data
      * @param   string      $sType  接口返回类型
      * @return  string
      **/
     static function show($iCode, $sMsg = '', $mixData = '', $sType = 'json')
     {
         if(!is_numeric($iCode))
             return '';
         $arData =   array(
             'code'      =>  $iCode,
             'message'   =>  $sMsg,
             'data'      =>  $mixData
         );
         switch($sType)
         {
         case 'array':
             echo '<pre>';
             print_r($arData);
             echo '</pre>';
             break;
         case 'xml':
             self::xml($arData);
             break;
         default:
             self::json($arData);
         }
     }   

     /**
      * json
      * @author  zhaoyingnan 2015-10-19 10:21
      * @param   array       $arData
      * @return  string
      **/
     private function json($arData= array())
     {
         exit(json_encode($arData));
     }  

     /**
      * xml
      * @author  zhaoyingnan 2015-10-19 10:21
      * @param   array       $arData
      * @return  string
      **/
     private function xml($arData = array())
     {
         header('Content-Type:text/xml');
         $sXml   =   '';
         $sXml   .=  "<?xml version='1.0' encoding='UTF-8'?>\n";
         $sXml   .=  "<root>\n";
         $sXml   .=  self::xmlEncode($arData);
         $sXml   .=  "</root>\n";
         exit($sXml);
     }

     /**
      * xml encode
      * @author  zhaoyingnan 2015-10-19 11:10
      * @param   array       $arData
      * @return  string
      **/
     private function xmlEncode($arData = array())
     {
         if(!$arData)
             return '';
         $sXml = $sAttr= '';
         foreach($arData as $mKey => $mVal)
         {
             if(is_numeric($mKey))
             {
                 $sAttr  =   " id='{$mKey}'";
                 $mKey   =   'item';
             }
             $sXml   .=  is_array($mVal) ? self::xmlEncode($mVal) : "<{$mKey}{$sAttr}>{$mVal}</{$mKey}>";
         }
         return $sXml;
     }
 }
 ?>

 <?php
 /**
  * Description: 静态缓存
  * Create date:2015-10-19 13:36
  * Author: zhaoyingnan
  **/
 class file
 {
     private $sExt   =   '.txt';

     /**
      * 生成/删除/获取 缓存
      * @author  zhaoyingnan 2015-10-19 11:33
      * @param   string      $sKey       文件名
      * @param   mix         $mixValue   被缓存的数据(为''时表示获取缓存,为NUll时为删除缓存文件,否则为生成缓存)
      * @param   string      $sPath      文件保存的路径
      * @param   int         $iCacheTime 缓存时间(秒),0为永不过期
      * @return  boolean
      **/
     public function cacheData($sKey, $mixValue = '', $sPath = '/alidata/www/lianxi/file/', $iCacheTime = 0)
     {
         $sPath  =   rtrim($sPath, '/').'/';
         $sFileName  =   $sPath.$sKey.$this->sExt;
         //生成缓存文件
         if($mixValue)
         {
             if(!is_dir($sPath))
                 mkdir($sPath, 0777);
             $iCacheTime =   sprintf('%011d', $iCacheTime);
             return file_put_contents($sFileName, $iCacheTime.json_encode($mixValue));
         }   

         if(is_file($sFileName) && !$mixValue)
         {
             if(is_null($mixValue))
             {
                 //删除缓存
                 return unlink($sFileName);
             }   

             //获取缓存
             $sContent   =   file_get_contents($sFileName);
             $iTime = intval(substr($sContent, 0, 11));
             $sContent   =   substr($sContent, 11);
             if($iTime != 0 && $iTime + filemtime($sFileName) < time())
             {
                 //过期了,删除
                 unlink($sFileName);
                 return FALSE;
             }
             return $sContent;
         }
         else
         {
             return FALSE;
         }
     }
 }
 ?>

 <?php
 include 'response.php';
 include 'file.php';
 $_GET['format'] =   isset($_GET['format']) && in_array($_GET['format'], array('xml', 'json', 'array')) ? $_GET['format'] : 'json';
 $file = new File();
 //删除缓存
 //exit(var_dump($file->cacheData('index_cache', null)));

 if(!$sContent = $file->cacheData('index_cache'))
 {
     //echo "获取缓存失败\n";
     //echo "获取数据\n";
     $arData =   array(
         'id'    =>  1,
         'name'  =>  'TeddyNan',
         'sex'   =>  23,
         array(
             'nani'=>array(
                 'g'=>'gg',
                 2,
                 4
             )
         )
     );
     //echo "生成缓存\n";

     $file->cacheData('index_cache', $arData, '/alidata/www/lianxi/file/', 0);
     Response::show(0, 'success', $arData, $_GET['format']);
 }
 else
 {
     Response::show(0, 'success', json_decode($sContent, TRUE), $_GET['format']);
 }
 ?>