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[php] php獲取網頁header信息的4種方法

房東:jack
發表時間:2015-12-07


php獲取網頁header信息的方法多種多樣,就php語言來說,我知道的方法有4種, 下面逐一獻上。

方法一:使用get_headers()函數

推薦指數: ★★★★★

get_header方法最簡單只要兩行代碼即可搞定。如下:

$thisurl = "http://www.lao8.org/";
print_r(get_headers($thisurl, 1));
得到的結果爲:

Array
(
[0] => HTTP/1.1 200 OK
[Cache-Control] => max-age=86400
[Content-Length] => 76102
[Content-Type] => text/html
[Content-Location] => http://www.lao8.org/index.html
[Last-Modified] => Fri, 19 Jul 2013 03:52:30 GMT
[Accept-Ranges] => bytes
[ETag] => "50bc48643384ce1:5cb3"
[Server] => Microsoft-IIS/6.0
[X-Powered-By] => ASP.NET
[Date] => Fri, 19 Jul 2013 09:06:39 GMT
[Connection] => close
)
方法二:使用http_response_header

推薦指數: ★★★

http_response_headerf方法也很簡單,僅三行:

$thisurl = "http://www.lao8.org";
$html = file_get_contents($thisurl );
print_r($http_response_header);
得到的結果爲:

Array
(
[0] => HTTP/1.1 200 OK
[1] => Cache-Control: max-age=86400
[2] => Content-Length: 76102
[3] => Content-Type: text/html
[4] => Content-Location: http://www.lao8.org/index.html
[5] => Last-Modified: Fri, 19 Jul 2013 03:52:30 GMT
[6] => Accept-Ranges: bytes
[7] => ETag: "50bc48643384ce1:5cb3"
[8] => Server: Microsoft-IIS/6.0
[9] => X-Powered-By: ASP.NET
[10] => Date: Fri, 19 Jul 2013 09:06:41 GMT
[11] => Connection: close
)
方法三:使用stream_get_meta_data()函數

推薦指數: ★★★

使用stream_get_meta_data()代碼也只需三行:

$thisurl = "http://www.lao8.org/";
$fp = fopen($thisurl, 'r');
print_r(stream_get_meta_data($fp));
得到的結果爲:

Array
(
[wrapper_data] => Array
(
[0] => HTTP/1.1 200 OK
[1] => Cache-Control: max-age=86400
[2] => Content-Length: 76102
[3] => Content-Type: text/html
[4] => Content-Location: http://www.lao8.org/index.html
[5] => Last-Modified: Fri, 19 Jul 2013 03:52:30 GMT
[6] => Accept-Ranges: bytes
[7] => ETag: "50bc48643384ce1:5cb3"
[8] => Server: Microsoft-IIS/6.0
[9] => X-Powered-By: ASP.NET
[10] => Date: Fri, 19 Jul 2013 09:06:41 GMT
[11] => Connection: close
)
[wrapper_type] => http
[stream_type] => tcp_socket
[mode] => r+
[unread_bytes] => 1086
[seekable] =>
[uri] => http://www.lao8.org/
[timed_out] =>
[blocked] => 1
[eof] =>
)
第四種方法: 使用php的高級函數 CURL()來獲取

推薦指數: ★★★★

上面的三種方法能獲取一般的網頁header信息,如果想要獲取更詳細的header信息比如網頁是否ㄔ峇FGZip壓縮。這時候可以用php的高級函數curl()來獲取。

使用curl獲得header可以檢測GZip壓縮
先貼出代碼:

$szUrl = 'http://www.lao8.org/';
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $szUrl);
curl_setopt($curl, CURLOPT_HEADER, 1); //輸出header信息
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); //不顯示網頁內容
curl_setopt($curl, CURLOPT_ENCODING, ''); //允許執行gzip
$data=curl_exec($curl);
if(!curl_errno($curl))
{
$info = curl_getinfo($curl);
$httpHeaderSize = $info['header_size']; //header字符串體積
$pHeader = substr($data, 0, $httpHeaderSize); //獲得header字符串
$split = array("rn", "n", "r"); //需要格式化header字符串
$pHeader = str_replace($split, '
', $pHeader); //使用
換行符格式化輸出到網頁上
echo $pHeader;
}
?>
輸出結果如下:



HTTP/1.1 200 OK
Cache-Control: max-age=86400
Content-Length: 15189
Content-Type: text/html
Content-Encoding: gzip
Content-Location: http://www.lao8.org/index.html
Last-Modified: Fri, 19 Jul 2013 03:52:28 GMT
Accept-Ranges: bytes
ETag: "0268684ce1:5cb3"
Vary: Accept-Encoding
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
Date: Fri, 19 Jul 2013 09:27:21 GMT



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