www.zf.com / library/Mf/Helpers/File.php

<?php
/**
 * clearstatcache() 函数清除文件状态缓存。
   clearstatcache() 函数会缓存某些函数的返回信息，以便提供更高的性能。
   但是有时候，比如在一个脚本中多次检查同一个文件，而该文件在此脚本执行期间有被删除或修改的危险时，你需要清除文件状态缓存，以便获得正确的结果。
   要做到这一点，就需要使用 clearstatcache() 函数。

   会进行缓存的函数，即受 clearstatcache() 函数影响的函数：
    stat()
    lstat()
    file_exists()
    is_writable()
    is_readable()
    is_executable()
    is_file()
    is_dir()
    is_link()
    filectime()
    fileatime()
    filemtime()
    fileinode()
    filegroup()
    fileowner()
    filesize()
    filetype()
    fileperms()

 *
 * Enter description here ...
 * @author maofeng
 *
 */
class Mf_Helpers_File extends Zend_Controller_Action_Helper_Abstract
{

    public function __construct(){

    }

    /**
     * file_get_contents()
     *
     * Enter description here ...
     * @param unknown_type $fileInfo 包含文的路径信息，例如 /home/wwwroot/
     * $fileInfo = array('public', 'attachment', 'demo.txt');
     */
    public function read($fileInfo = array()){
        $result = '';

        if(!empty($fileInfo)){
            $str = '';
            foreach ($fileInfo as $v){
                $str .= '/'.$v;
            }
            $str = trim($str, '/');
        }

        $realPath = Mf_Configs_Config::getInstance()->getConfig('realPath');
        $attachmentPath = $realPath.$str;

        if(file_exists($attachmentPath)){
            $result = file_get_contents($attachmentPath);
        }else{
            //echo '文件不存在';exit;
            return false;
        }

        return $result;
    }

    /**
     * file_put_contents()
     * Enter description here ...
     * @param unknown_type $fileInfo
     * @param unknown_type $content
     * $fileInfo = array('public', 'attachment', 'demo.txt');
     */
    public function write($fileInfo = array(), $content = ''){

        if(!empty($fileInfo)){
            $str = '';
            foreach ($fileInfo as $v){
                $str .= '/'.$v;
            }
            $str = trim($str, '/');
        }

        $realPath = Mf_Configs_Config::getInstance()->getConfig('realPath');
        $attachmentPath = $realPath.$str;

        $arr = explode('/', trim($attachmentPath, '/'));

        $dir = '';
        for($i=0; $i<(count($arr)-1); $i++){
            $dir .= '/'.$arr[$i];
        }

        if(is_dir($dir) && is_writable($dir)){
            $byte = file_put_contents($attachmentPath, $content);
            if($byte > 0){
                return true;
            }else{
                return false;
            }
        }else{
            return false;
        }

    }

    /**
     *
     *
     * Enter description here ...
     * @param unknown_type $fileName 要上传的文件源信息
     * @param unknown_type $fileInfo 上传目标文件的信息 array('public', 'attachment') 代表/public/attachment/目录下
     * @param unknown_type $newFileName 新上传文件的名字，一般会重命名，即重命名 default = 'newName' ,
     * @param unknown_type $limit 允许上传的文件的后辍限制
     * $fileInfo = array('public', 'attachment', 'demo.txt');
     */
    public function upload($fileName = '', $pathInfo = array(), $newFileName = 'newName', $limit = array('tailer'=>array('txt'), 'size'=>102400 )){

        if(is_uploaded_file($_FILES[$fileName]['tmp_name'])){

            if(!empty($pathInfo)){
                $str = '';
                foreach ($pathInfo as $v){
                    $str .= '/'.$v;
                }
                $str = trim($str, '/');
            }

            $realPath = Mf_Configs_Config::getInstance()->getConfig('realPath');
            $dir = $realPath.$str;

            if(is_dir($dir) && is_writable($dir)){

                $oldName = $_FILES[$fileName]['name'];

                $cacheArray = explode('.', $oldName);

                $tailer = $cacheArray[count($cacheArray) - 1];

                if(in_array($tailer, $limit['tailer'])){

                    $newName = $newFileName.'.'.$tailer;

                    $destination = $dir.'/'.$newName;

                    move_uploaded_file($_FILES[$fileName]['tmp_name'], $destination);

                }

            }

        }
    }


    public function download($fileInfo = array(), $newName = 'newFile.txt'){


        $result = '';

        if(!empty($fileInfo)){
            $str = '';
            foreach ($fileInfo as $v){
                $str .= '/'.$v;
            }
            $str = trim($str, '/');
        }

        $realPath = Mf_Configs_Config::getInstance()->getConfig('realPath');
        $attachmentPath = $realPath.$str;

        if(file_exists($attachmentPath)){

            header("Content-Type:application/octet-stream");
            header("Content-Disposition: attachment; filename=$newName");

            header("Pragma: no-cache");
            header("Expires: 0");
            echo file_get_contents($attachmentPath);
            exit;

        }

    }




}