- class download
- {
- var http://pic4.phprm.com/2010/07/22/http://pic4.phprm.com/2010/07/22/$url.jpg.jpg;// 远程文件地址
- var $file_name = "hdwiki.zip";// 下载来的文件名称
- var $save_path = "./www.phprm.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(!empty($url))$this->url = $url;
- }
- function setfilename($file_name)
- {
- if(!empty($file_name))$this->file_name = $file_name;
- }
- function setsavepath($save_path)
- {
- if(!empty($save_path))$this->save_path = $save_path;
- }
- function setredown($redown)
- {
- if(!empty($redown))$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;
- }
- }
来源: https://www.php1.cn/detail/php-7a42d4210a.html