今天看到一个朋友利用php socket来获取的301跳转之后地地址了,其实我们还有一个非常简单办法了,就是使用php get_headers()函数获取数获取http头信息了,下面来看看我们的实现方法.
获取301状态肯定没问题,代码如下:
function getrealurl($url){
$header = get_headers($url,1);
if (strpos($header[0],'301') || strpos($header[0],'302')) {
if(is_array($header['Location'])) {
return $header['Location'][count($header
['Location'])-1];
}else{
return $header['Location'];
}
}else {
return $url;
}
}补充:get_headers,取得服务器响应一个 HTTP 请求所发送的所有标头,代码如下:
$url = 'http://phprm.com';print_r(get_headers($url));
结果,代码如下:
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Array
(
[0] => HTTP/1.1 301 Moved Permanently
[1] => Date: Tue, 01 Jul 2014 07:49:26 GMT
[2] => Server: Apache/2.2.22 (Win32) PHP/5.2.17
[3] => Location: http://www.phprm.com/
[4] => Content-Length: 314
[5] => Content-Type: text/html; charset=iso-8859-1
[6] => X-Via: 1.1 jszjsx60:8080 (Cdn Cache Server V2.0), 1.1 zb51:6 (Cdn Cache Server V2.0)
[7] => Connection: close
[8] => HTTP/1.1 200 OK
[9] => Date: Tue, 01 Jul 2014 07:49:27 GMT
[10] => Server: Apache/2.2.22 (Win32) PHP/5.2.17
[11] => Last-Modified: Tue, 01 Jul 2014 07:41:43 GMT
[12] => ETag: "7a0000002fe1a1-68a9-4fd1ce83bc0f7"
[13] => Accept-Ranges: bytes
[14] => Content-Length: 26793
[15] => Content-Type: text/html
[16] => X-Via: 1.1 jszjsx60:8080 (Cdn Cache Server V2.0), 1.1 zb62:5 (Cdn Cache Server V2.0)
[17] => Connection: close
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