这里为各位提供一款远程文件下载代码,我们可以把远程的文件用php下载到本地指定的目录,下面就是一款下载远程服务器文件代码类。
- 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 = "./www.Vevb.com";//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()
 - {
 - //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! 重新下载";
 - 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;
 - }
 - }
 
新闻热点
疑难解答