PHP实现的下载远程文件类定义与用法示例
发布时间：2021-02-07 10:03:02 所属栏目：PHP教程 来源：网络整理
导读：本篇章节讲解PHP实现的下载远程文件类定义与用法。分享给大家供大家参考，具体如下： m_url = $url; if(is_array($urls)) { $this->m_host = $urls["host"]; if(!empty($urls["scheme"])) $this->m_scheme = $urls["scheme"]; if(!empty($urls["user"])) $
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本篇章节讲解PHP实现的下载远程文件类定义与用法。分享给大家供大家参考，具体如下： m_url = $url; if(is_array($urls)) { $this->m_host = $urls["host"]; if(!empty($urls["scheme"])) $this->m_scheme = $urls["scheme"]; if(!empty($urls["user"])) $this->m_user = $urls["user"]; if(!empty($urls["pass"])) $this->m_pass = $urls["pass"]; if(!empty($urls["port"])) $this->m_port = $urls["port"]; if(!empty($urls["path"])) $this->m_path = $urls["path"]; $this->m_urlpath = $this->m_path; if(!empty($urls["query"])) { $this->m_query = $urls["query"]; $this->m_urlpath .= "?".$this->m_query; } } } /** * 打开指定网址 */ function OpenUrl($url) { #重设各参数 $this->m_url = ""; $this->m_urlpath = ""; $this->m_scheme = "http"; $this->m_host = ""; $this->m_port = "80"; $this->m_user = ""; $this->m_pass = ""; $this->m_path = "/"; $this->m_query = ""; $this->m_error = ""; $this->m_httphead = "" ; $this->m_html = ""; $this->Close(); #初始化系统 $this->PrivateInit($url); $this->PrivateStartSession(); } /** * 获得某操作错误的原因 */ public function printError() { echo "错误信息：".$this->m_error; echo "具体返回头："; foreach($this->m_httphead as $k=>$v) { echo "$k => $v rn"; } } /** * 判别用Get方法发送的头的应答结果是否正确 */ public function IsGetOK() { if( ereg("^2",$this->GetHead("http-state")) ) { return true; } else { $this->m_error .= $this->GetHead("http-state")." - ".$this->GetHead("http-describe")." "; return false; } } /** * 看看返回的网页是否是text类型 */ public function IsText() { if (ereg("^2",$this->GetHead("http-state")) && eregi("^text",$this->GetHead("content-type"))) { return true; } else { $this->m_error .= "内容为非文本类型 "; return false; } } /** * 判断返回的网页是否是特定的类型 */ public function IsContentType($ctype) { if (ereg("^2",$this->GetHead("http-state")) && $this->GetHead("content-type") == strtolower($ctype)) { return true; } else { $this->m_error .= "类型不对 ".$this->GetHead("content-type")." "; return false; } } /** * 用 HTTP 协议下载文件 */ public function SaveToBin($savefilename) { if (!$this->IsGetOK()) return false; if (@feof($this->m_fp)) { $this->m_error = "连接已经关闭！"; return false; } $fp = fopen($savefilename,"w") or die("写入文件 $savefilename 失败！"); while (!feof($this->m_fp)) { @fwrite($fp,fgets($this->m_fp,256)); } @fclose($this->m_fp); return true; } /** * 保存网页内容为 Text 文件 */ public function SaveToText($savefilename) { if ($this->IsText()) { $this->SaveBinFile($savefilename); } else { return ""; } } /** * 用 HTTP 协议获得一个网页的内容 */ public function GetHtml() { if (!$this->IsText()) return ""; if ($this->m_html!="") return $this->m_html; if (!$this->m_fp||@feof($this->m_fp)) return ""; while(!feof($this->m_fp)) { $this->m_html .= fgets($this->m_fp,256); } @fclose($this->m_fp); return $this->m_html; } /** * 开始 HTTP 会话 */ public function PrivateStartSession() { if (!$this->PrivateOpenHost()) { $this->m_error .= "打开远程主机出错!"; return false; } if ($this->GetHead("http-edition")=="HTTP/1.1") { $httpv = "HTTP/1.1"; } else { $httpv = "HTTP/1.0"; } fputs($this->m_fp,"GET ".$this->m_urlpath." $httpvrn"); fputs($this->m_fp,"Host: ".$this->m_host."rn"); fputs($this->m_fp,"Accept: */*rn"); fputs($this->m_fp,"User-Agent: Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.2)rn"); #HTTP1.1协议必须指定文档结束后关闭链接,否则读取文档时无法使用feof判断结束 if ($httpv=="HTTP/1.1") { fputs($this->m_fp,"Connection: Closernrn"); } else { fputs($this->m_fp,"rn"); } $httpstas = fgets($this->m_fp,256); $httpstas = split(" ",$httpstas); $this->m_httphead["http-edition"] = trim($httpstas[0]); $this->m_httphead["http-state"] = trim($httpstas[1]); $this->m_httphead["http-describe"] = ""; for ($i=2;$i 更多关于PHP相关内容感兴趣的读者可查看本站专题：《》、《》、《》、《》、《》、《》、《》及《》 希望本文所述对大家PHP程序设计有所帮助。 （编辑：厦门站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
