ThinkPHP 3.2.3实现页面静态化功能的方法详解

<?php
// +----------------------------------------------------------------------
// | TOPThink [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2013 http://topthink.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace ThinkStorageDriver;
use ThinkStorage;
// 本地文件写入存储类
class File extends Storage{

 private $contents=array();

 /**
  * 架构函数
  * @access public
  */
 public function __construct() {
 }

 /**
  * 文件内容读取
  * @access public
  * @param string $filename 文件名
  * @return string  
  */
 public function read($filename,$type=''){
  return $this->get($filename,'content',$type);
 }

 /**
  * 文件写入
  * @access public
  * @param string $filename 文件名
  * @param string $content 文件内容
  * @return boolean   
  */
 public function put($filename,$content,$type=''){
  $dir   = dirname($filename);
  if(!is_dir($dir))
   mkdir($dir,0755,true);
  if(false === file_put_contents($filename,$content)){
   E(L('_STORAGE_WRITE_ERROR_').':'.$filename);
  }else{
   $this->contents[$filename]=$content;
   return true;
  }
 }

 /**
  * 文件追加写入
  * @access public
  * @param string $filename 文件名
  * @param string $content 追加的文件内容
  * @return boolean  
  */
 public function append($filename,$content,$type=''){
  if(is_file($filename)){
   $content = $this->read($filename,$type).$content;
  }
  return $this->put($filename,$content,$type);
 }

 /**
  * 加载文件
  * @access public
  * @param string $filename 文件名
  * @param array $vars 传入变量
  * @return void  
  */
 public function load($_filename,$vars=null){
  if(!is_null($vars))
   extract($vars, EXTR_OVERWRITE);
  include $_filename;
 }

 /**
  * 文件是否存在
  * @access public
  * @param string $filename 文件名
  * @return boolean  
  */
 public function has($filename,$type=''){
  return is_file($filename);
 }

 /**
  * 文件删除
  * @access public
  * @param string $filename 文件名
  * @return boolean  
  */
 public function unlink($filename,$type=''){
  unset($this->contents[$filename]);
  return is_file($filename) ? unlink($filename) : false; 
 }

 /**
  * 读取文件信息
  * @access public
  * @param string $filename 文件名
  * @param string $name 信息名 mtime或者content
  * @return boolean  
  */
 public function get($filename,$name,$type=''){
  if(!isset($this->contents[$filename])){
   if(!is_file($filename)) return false;
   $this->contents[$filename]=file_get_contents($filename);
  }
  $content=$this->contents[$filename];
  $info = array(
   'mtime'  => filemtime($filename),
   'content' => $content
  );
  return $info[$name];
 }
}								 
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