PHP Download remote File Class (support breakpoint continuation)

PHP Downloads A remote file class that supports a breakpoint continuation download, and the code contains specific invocation instructions. The program is mainly using the HTTP protocol to download files, HTTP1.1 protocol must specify the end of the document to close the link, otherwise read the document can not use the feof judgment end, there are two ways to use, specific download view source.

<?php/** * Download remote file class support breakpoint Extension/class Httpdownload {private $m _url = "";
 	Private $m _urlpath = "";
 	Private $m _scheme = "http";
 	Private $m _host = "";
 	Private $m _port = "80";
 	Private $m _user = "";
 	Private $m _pass = "";
 	Private $m _path = "/";
 	Private $m _query = "";
 	Private $m _FP = "";
	Private $m _error = "";
	Private $m _httphead = "";
 
	Private $m _html = "";
		/** * Initialize/Public function Privateinit ($url) {$urls = "";
		$urls = @parse_url ($url);
		$this->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 = $urls ["User"];
		    if ($urls ["Pass"]) $this->m_pass = $urls [!empty];
		    if (!empty ($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. = "?".
     		$this->m_query;
		}}/** * Opens the specified URL/function OpenURL ($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 ();
		/** * Get the reason for an operation error/Public Function Printerror () {echo error message:. $this->m_error;
		echo "Concrete return head:<br>"; 
		foreach ($this->m_httphead as $k => $v) {echo "$k => $v <br>rn";  
			}/** * Discriminant The answer result of the header sent with the Get method is correct/public function Isgetok () {if (Ereg ("^2", $this->gethead ("Http-state")) { 
		return true; else {$this->m_error. = $this->gethead ("Http-state"). "-". $this->gethead("Http-describe"). "
			<br> ";
		return false; }/** * See if the returned page is a text type/Public function Istext () {if (Ereg ("^2", $this->gethead ("Http-state")) &&amp ; 
		Eregi ("^text", $this->gethead ("Content-type"))) {return true;
			else {$this->m_error. = "Content is not text type <br>";
		return false;  }/** * Determines whether the returned Web page is a specific type/Public function Iscontenttype ($ctype) {if (Ereg ("^2", $this->gethead ("Http-state")) 
		&& $this->gethead ("content-type") = = Strtolower ($ctype)) {return true; else {$this->m_error. = "wrong type". $this->gethead ("Content-type"). "
			<br> ";
		return false;
		}/** * Download file with HTTP protocol */Public function Savetobin ($savefilename) {if (! $this->isgetok ()) return false; if (@feof ($this->m_fp)) {$this->m_error = ' The connection is closed! 
			"; 
		return false; $fp = fopen ($savefilename, "w") or Die ("Write file $savefilename failed!")
		");
		while (!feof ($this->m_fp)) {@fwrite ($fp, fgets ($this->m_fp,256));
		}@fclose ($this->m_fp);
	return true; /** * Save Web page contents as text file */Public Function Savetotext ($savefilename) {if ($this->istext ()) {$this->save
		Binfile ($savefilename);
		else {return "";
		}/** * uses HTTP protocol to obtain the content of a Web page/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; /** * Start HTTP session/Public Function privatestartsession () {if (! $this->privateopenhost ()) {$this->m_e
			Rror. = "Open remote host error!";
		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 ($this->m_fp, "user-agent:mozilla/4.0+ (compatible;+msie+6.0;+windows+nt+5.2) rn"); #HTTP1.1 protocol must specify that the link be closed after the end of the document, otherwise you cannot use feof to judge the End if ($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 $i <count ($httpstas), $i + +) {$this->m_httphead["http-describe"]. = "". Trim ($httpstas [$i]);
			while (!feof ($this->m_fp)) {$line = Str_replace ("" "," ", Trim (fgets ($this->m_fp,256)));
			if ($line = = "") break;
				if (Ereg (":", $line)) {$lines = Split (":", $line);
			$this->m_httphead[strtolower (Trim ($lines [0]))] = Trim ($lines [1]); /** * Gets the value of an HTTP header */Public Function GetHead ($headname) {$headname = Strtolower ($headname);
		if (Isset ($this->m_httphead[$headname]) {return $this->m_httphead[$headname];
		else {return "";
		}/** * Open connection */Public Function privateopenhost () {if ($this->m_host== "") return false;
		$this->m_fp = @fsockopen ($this->m_host, $this->m_port, & $errno, & $errstr, 10);
			if (! $this->m_fp) {$this->m_error = $errstr;
		return false;
		else {return true;
	}/** * Shut down connection/public function close () {@fclose ($this->m_fp);
The #两种使用方法, respectively, are as follows: #打开网页 $httpdown = new Httpdownload ();
$httpdown->openurl ("http://www.google.com.hk");
echo $httpdown->gethtml ();


$httpdown->close (); #下载文件 $file = new Httpdownload (); # Instantiate class $file->openurl ("http://www.ti.com.cn/cn/lit/an/rust020/rust020.pdf"); # Remote File address $file->savetobin ("rust020.pdf"); # Save path and filename $file->close (); # Free Resources?>