PHP抓取网页内容的几种方法

方法1: 用file_get_contents 以get方式获取内容

<?php

$url='http://www.domain.com/?para=123';

$html = file_get_contents($url);

echo $html;

?> 

方法2：用file_get_contents函数,以post方式获取url

<?php

$url = 'http://www.domain.com/test.php?id=123';

$data = array ('foo' => 'bar');

$data = http_build_query($data); 

$opts = array (

'http' => array (

   'method' => 'POST',

   'header'=> "Content-type: application/x-www-form-urlencoded\r\n" .

                     "Content-Length: " . strlen($data) . "\r\n",

   'content' => $data

)

);

$ctx = stream_context_create($opts);

$html = @file_get_contents($url,'',$ctx); 

如果需要再传递cookie数据,则把

'header'=> "Content-type: application/x-www-form-urlencoded\r\n" .

                  "Content-Length: " . strlen($data) . "\r\n",

修改为

'header'=> "Content-type: application/x-www-form-urlencoded\r\n" .

                 "Content-Length: " . strlen($data) . "\r\n".

                 "cookie:cookie1=c1;cookie2=c2\r\n" ;

即可 

方法3: 用fopen打开url, 以get方式获取内容

<?php

$fp = fopen($url, 'r');

$header = stream_get_meta_data($fp);//获取报头信息

while(!feof($fp)) {

$result .= fgets($fp, 1024);

}

echo "url header: {$header} <br>":

echo "url body: $result";

fclose($fp);

?> 

方法4: 用fopen打开url, 以post方式获取内容

<?php

$data = array ('foo2' => 'bar2','foo3'=>'bar3');

$data = http_build_query($data); 

$opts = array (

'http' => array (

'method' => 'POST',

'header'=> "Content-type: application/x-www-form-urlencoded\r\nCookie:cook1=c3;cook2=c4\r\n" .

"Content-Length: " . strlen($data) . "\r\n",

'content' => $data

)

); 

$context = stream_context_create($opts);

$html = fopen('http://www.test.com/zzzz.php?id=i3&id2=i4','rb' ,false, $context);

$w=fread($html,1024);

echo $w;

?> 

方法5：用fsockopen函数打开url，以get方式获取完整的数据，包括header和body

<?php

function get_url ($url,$cookie=false)

{

$url = parse_url($url);

$query = $url[path]."?".$url[query];

echo "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\r\n";

$request .= "Host: $url[host]\r\n";

$request .= "Connection: Close\r\n";

if($cookie) $request.="Cookie:   $cookie\n";

$request.="\r\n";

fwrite($fp,$request);

while(!@feof($fp)) {

$result .= @fgets($fp, 1024);

}

fclose($fp);

return $result;

}

}

//获取url的html部分，去掉header

function GetUrlHTML($url,$cookie=false)

{

$rowdata = get_url($url,$cookie);

if($rowdata)

{

$body= stristr($rowdata,"\r\n\r\n");

$body=substr($body,4,strlen($body));

return $body;

} 

   return false;

}

?> 

方法6：用fsockopen函数打开url，以POST方式获取完整的数据，包括header和body

<?php

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;

} 

?> 

方法7:使用curl库，使用curl库之前，可能需要查看一下php.ini是否已经打开了curl扩展

<?php

$ch = curl_init();

$timeout = 5;

curl_setopt ($ch, CURLOPT_URL, 'http://www.domain.com/');

curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);

curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);

$file_contents = curl_exec($ch);

curl_close($ch); 

echo $file_contents;

?>
巴特西

PHP抓取网页内容的几种方法

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