php获取网页内容的几个方法

PHP获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

$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

$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";

方法3: 用fopen打开url, 以get方式获取内容

$fp= fopen($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

$data = ['foo2' => 'bar2', 'foo3' => 'bar3']; $data = http_build_query($data); $opts = [ 'http' => [ 'method' => 'POST', 'header' => "Content-type: application/x-www-form-urlencoded\r\nCookie:cook1=c3;cook2=c4\r\n" . "Content-Length: " . strlen($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

functionget_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) { returnfalse; }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 functionGetUrlHTML($url,$cookie=false) $rowdata= get_url($url,$cookie); if($rowdata) $body=stristr($rowdata,"\r\n\r\n"); $body=substr($body,4,strlen($body)); return$body; returnfalse;

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

functionHTTP_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 $data foreach($dataas $key=>$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

$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;

php获得网页源代码抓取网页内容的几种方法

这里收集了3种利用php获得网页源代码抓取网页内容的方法,我们可以根据实际需要选用。

1、使用file_get_contents获得网页源代码

这个方法最常用,只需要两行代码即可,非常简单方便。

参考代码:

$fh= file_get_contents('http://www.webkaka.com/'); echo $fh;

2、使用fopen获得网页源代码

这个方法用的人也不少,不过代码有点多。

参考代码:

$fh = fopen('http://www.webkaka.com/', 'r'); if($fh){ while(!feof($fh)) { echo fgets($fh);

3、使用curl获得网页源代码

使用curl获得网页源代码的做法,往往是需要更高要求的人使用,例如当你需要在抓取网页内容的同时,得到网页header信息,还有ENCODING编码的使用,USERAGENT的使用等等。

参考代码一:

// 创建一个新cURL资源 $ch = curl_init(); // 设置URL和相应的选项 curl_setopt($ch, CURLOPT_URL, "http://www.webkaka.com/"); curl_setopt($ch, CURLOPT_HEADER, false); // 抓取URL并把它传递给浏览器 $data = curl_exec($ch); echo $data; //关闭cURL资源,并且释放系统资源 curl_close($ch);

参考代码二:

$szUrl = "http://www.webkaka.com/"; $UserAgent = 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506; .NET CLR 3.5.21022; .NET CLR 1.0.3705; .NET CLR 1.1.4322)'; $curl = curl_init(); curl_setopt($curl, CURLOPT_URL, $szUrl); curl_setopt($curl, CURLOPT_HEADER, 0); //0表示不输出Header,1表示输出 curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false); curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false); curl_setopt($curl, CURLOPT_ENCODING, ''); curl_setopt($curl, CURLOPT_USERAGENT, $UserAgent); curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1); $data = curl_exec($curl); echo $data; //echo curl_errno($curl); //返回0时表示程序执行成功 [](http://www.webkaka.com/tutorial/php/2012/101721/)[如何从curl_errno返回值获取错误信息](http://www.webkaka.com/tutorial/php/2012/101721/) exit();