PHP远程下载类
发布:smiling 来源: PHP粉丝网 添加日期:2014-08-06 15:07:57 浏览: 评论:0
- <?php
- class download
- {
- var $url;//远程文件地址
- var $file_name = "hdwiki.zip";//下载来的文件名称
- var $save_path = "./updatefile";//下载到本地的文件路径
- var $localfile;//下载到本地文件的路径和名称
- var $warning;//警告信息
- var $redown=0;//是否重新下载
- /*初始化*/
- function seturl($url)
- {
- if(!emptyempty($url))$this->url = $url;
- }
- function setfilename($file_name)
- {
- if(!emptyempty($file_name))$this->file_name = $file_name;
- }
- function setsavepath($save_path)
- {
- if(!emptyempty($save_path))$this->save_path = $save_path;
- }
- function setredown($redown)
- {
- if(!emptyempty($redown))$this->redown = $redown;
- }
- function download($url, $redown = 0, $save_path = 0, $file_name = 0)
- {
- $this->seturl($url);
- $this->setfilename($file_name);
- $this->setsavepath($save_path);
- $this->setredown($redown);
- if(!file_exists($this->save_path))
- {
- $dir = explode("/",$this->save_path);
- foreach($dir as $p)
- mkdir($p);
- }
- }
- /* 检查url合法性函数 */
- function checkurl(){
- return preg_match("/^(http|ftp)(://)([a-za-z0-9-_]+[./]+[w-_/]+.*)+$/i", $this->url);
- }
- //下载文件到本地
- function downloadfile()
- {//开源代码phpfensi.com
- //检测变量
- $this->localfile = $this->save_path."/".$this->file_name;
- if($this->url == "" || $this->localfile == ""){
- $this->warning = "error: 变量设置错误.";
- return $this->warning;
- }
- if (!$this->checkurl()){
- $this->warning = "error: url ". $this->url ." 不合法.";
- return $this->warning;
- }
- if (file_exists($this->localfile)){
- if($this->redown)
- {
- unlink($this->localfile);
- }
- else
- {
- $this->warning = "warning: 升级文件 ". $this->localfile ." 已经存在! <a href='?action=download&redown=1' target='_self'>重新下载</a>";
- return $this->warning;
- //exit("error: 本地文件 ". $this->localfile ." 已经存在,请删除或改名后重新运行本程序.");
- }
- }
- //打开远程文件
- $fp = fopen($this->url, "rb");
- if (!$fp){
- $this->warning = "error: 打开远程文件 ". $this->url ." 失败.";
- return $this->warning;
- }
- //打开本地文件
- $sp = fopen($this->localfile, "wb");
- if (!$sp){
- $this->warning = "error: 打开本地文件 ". $this->localfile ." 失败.";
- return $this->warning;
- }
- //下载远程文件
- //echo "正在下载远程文件,请等待";
- while (!feof($fp)){
- $tmpfile .= fread($fp, 1024);
- //echo strlen($tmpfile);
- }
- //保存文件到本地
- fwrite($sp, $tmpfile);
- fclose($fp);
- fclose($sp);
- if($this->redown)
- $this->warning = "success: 重新下载文件 ". $this->file_name ." 成功";
- else
- $this->warning = "success: 下载文件 ". $this->file_name ." 成功";
- return $this->warning;
- }
- }
- ?>
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