快捷導(dǎo)航

PHP下打開(kāi)URL地址的幾種方法小結(jié)

更新時(shí)間：2010年05月16日 21:52:58 作者：

PHP中打開(kāi)URL地址的幾種方法總結(jié)，這里的函數(shù)主要用于小偷采集等函數(shù)。

1: 用file_get_contents 以get方式獲取內(nèi)容

 
<?php 
$url='http://www.baidu.com/'; 
$html = file_get_contents($url); 
//print_r($http_response_header); 
ec($html); 
printhr(); 
printarr($http_response_header); 
printhr(); 
?> 

示例代碼2: 用fopen打開(kāi)url, 以get方式獲取內(nèi)容

復(fù)制代碼代碼如下:

 
<? 
$fp = fopen($url, 'r'); 
printarr(stream_get_meta_data($fp)); 
printhr(); 
while(!feof($fp)) { 
$result .= fgets($fp, 1024); 
} 
echo "url body: $result"; 
printhr(); 
fclose($fp); 
?> 

示例代碼3：用file_get_contents函數(shù),以post方式獲取url

復(fù)制代碼代碼如下:

 
<?php 
$data = array ('foo' => 'bar'); 
$data = http_build_query($data); 
$opts = array ( 
'http' => array ( 
'method' => 'POST', 
'header'=> "Content-type: application/x-www-form-urlencoded" . 
"Content-Length: " . strlen($data) . "", 
'content' => $data 
), 
); 
$context = stream_context_create($opts); 
$html = file_get_contents('http://localhost/e/admin/test.html', false, $context); 
echo $html; 
?> 

示例代碼4：用fsockopen函數(shù)打開(kāi)url，以get方式獲取完整的數(shù)據(jù)，包括header和body

復(fù)制代碼代碼如下:

 
<? 
function get_url ($url,$cookie=false) { 
$url = parse_url($url); 
$query = $url[path]."?".$url[query]; 
ec("Query:".$query); 
$fp = fsockopen( $url[host], $url[port]?$url[port]:80 , $errno, $errstr, 30); 
if (!$fp) { 
return false; 
} else { 
$request = "GET $query HTTP/1.1"; 
$request .= "Host: $url[host]"; 
$request .= "Connection: Close"; 
if($cookie) $request.="Cookie: $cookie\n"; 
$request.=""; 
fwrite($fp,$request); 
while(!@feof($fp)) { 
$result .= @fgets($fp, 1024); 
} 
fclose($fp); 
return $result; 
} 
} 
//獲取url的html部分，去掉header 
function GetUrlHTML($url,$cookie=false) { 
$rowdata = get_url($url,$cookie); 
if($rowdata) 
{ 
$body= stristr($rowdata,""); 
$body=substr($body,4,strlen($body)); 
return $body; 
} 
return false; 
} 

?> 

示例代碼5：用fsockopen函數(shù)打開(kāi)url，以POST方式獲取完整的數(shù)據(jù)，包括header和body

復(fù)制代碼代碼如下:

 
<? 
function HTTP_Post($URL,$data,$cookie, $referrer="") { 
// parsing the given URL 
$URL_Info=parse_url($URL); 
// Building referrer 
if($referrer=="") // if not given use this script as referrer 
$referrer="111"; 
// making string from $data 
foreach($data as $key=>$value) 
$values[]="$key=".urlencode($value); 
$data_string=implode("&",$values); 
// Find out which port is needed - if not given use standard (=80) 
if(!isset($URL_Info["port"])) 
$URL_Info["port"]=80; 
// building POST-request: 
$request.="POST ".$URL_Info["path"]." HTTP/1.1\n"; 
$request.="Host: ".$URL_Info["host"]."\n"; 
$request.="Referer: $referer\n"; 
$request.="Content-type: application/x-www-form-urlencoded\n"; 
$request.="Content-length: ".strlen($data_string)."\n"; 
$request.="Connection: close\n"; 
$request.="Cookie: $cookie\n"; 
$request.="\n"; 
$request.=$data_string."\n"; 
$fp = fsockopen($URL_Info["host"],$URL_Info["port"]); 
fputs($fp, $request); 
while(!feof($fp)) { 
$result .= fgets($fp, 1024); 
} 
fclose($fp); 
return $result; 
} 
printhr(); 
?> 

示例代碼6:使用curl庫(kù)，使用curl庫(kù)之前，你可能需要查看一下php.ini，查看是否已經(jīng)打開(kāi)了curl擴(kuò)展

復(fù)制代碼代碼如下:

 
<? 
$ch = curl_init(); 
$timeout = 5; 
curl_setopt ($ch, CURLOPT_URL, 'http://www.baidu.com/'); 
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); 
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout); 
$file_contents = curl_exec($ch); 
curl_close($ch); 
echo $file_contents; 
?> 

關(guān)于curl庫(kù)：
curl官方網(wǎng)站http://curl.haxx.se/
curl 是使用URL語(yǔ)法的傳送文件工具，支持FTP、FTPS、HTTP HTPPS SCP SFTP TFTP TELNET DICT FILE和LDAP。curl 支持SSL證書(shū)、HTTP POST、HTTP PUT 、FTP 上傳，kerberos、基于HTT格式的上傳、代理、cookie、用戶＋口令證明、文件傳送恢復(fù)、http代理通道和大量其他有用的技巧

復(fù)制代碼代碼如下:

 
<? 
function printarr(array $arr) 
{ 
echo "<br> Row field count: ".count($arr)."<br>"; 
foreach($arr as $key=>$value) 
{ 
echo "$key=$value <br>"; 
} 
} 
?> 

7.
有些主機(jī)服務(wù)商把php的allow_url_fopen選項(xiàng)是關(guān)閉了，就是沒(méi)法直接使用file_get_contents來(lái)獲取遠(yuǎn)程web頁(yè)面的內(nèi)容。那就是可以使用另外一個(gè)函數(shù)curl。
下面是file_get_contents和curl兩個(gè)函數(shù)同樣功能的不同寫(xiě)法
file_get_contents函數(shù)的使用示例:

復(fù)制代碼代碼如下:

 
< ?php 
$file_contents = file_get_contents('http://www.ccvita.com/'); 
echo $file_contents; 
?> 

換成curl函數(shù)的使用示例:

復(fù)制代碼代碼如下:

 
< ?php 
$ch = curl_init(); 
$timeout = 5; 
curl_setopt ($ch, CURLOPT_URL, 'http://www.ccvita.com'); 
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); 
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout); 
$file_contents = curl_exec($ch); 
curl_close($ch); 
echo $file_contents; 
?> 

利用function_exists函數(shù)來(lái)判斷php是否支持一個(gè)函數(shù)可以輕松寫(xiě)出下面函數(shù)

復(fù)制代碼代碼如下:

 
< ?php 
function vita_get_url_content($url) { 
if(function_exists('file_get_contents')) { 
$file_contents = file_get_contents($url); 
} else { 
$ch = curl_init(); 
$timeout = 5; 
curl_setopt ($ch, CURLOPT_URL, $url); 
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); 
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout); 
$file_contents = curl_exec($ch); 
curl_close($ch); 
} 
return $file_contents; 
} 
?> 