php 原生或curl获取 http headers
2013-08-07 01:09 youxin 阅读(3522) 评论(1) 编辑 收藏 举报有一个函数:
array get_headers ( string $url
[, int $format
= 0 ] )
Parameters
url
The target URL.
format
If the optional format parameter is set to non-zero, get_headers() parses the response and sets the array's keys.
设置为非0返会解析响应关联数组。
Return Values
Returns an indexed or associative array with the headers, or FALSE on failure.
<?php
$url = 'http://www.example.com';
print_r(get_headers($url));
print_r(get_headers($url, 1));
?>
Array ( [0] => HTTP/1.1 200 OK [1] => Date: Sat, 29 May 2004 12:28:13 GMT [2] => Server: Apache/1.3.27 (Unix) (Red-Hat/Linux) [3] => Last-Modified: Wed, 08 Jan 2003 23:11:55 GMT [4] => ETag: "3f80f-1b6-3e1cb03b" [5] => Accept-Ranges: bytes [6] => Content-Length: 438 [7] => Connection: close [8] => Content-Type: text/html ) Array ( [0] => HTTP/1.1 200 OK [Date] => Sat, 29 May 2004 12:28:14 GMT [Server] => Apache/1.3.27 (Unix) (Red-Hat/Linux) [Last-Modified] => Wed, 08 Jan 2003 23:11:55 GMT [ETag] => "3f80f-1b6-3e1cb03b" [Accept-Ranges] => bytes [Content-Length] => 438 [Connection] => close [Content-Type] => text/html )
http://php.net/manual/en/function.get-headers.php
Fetches all HTTP headers from the current request.
This function is an alias for apache_request_headers(). Please read the apache_request_headers() documentation for more information on how this function works.
An associative array of all the HTTP headers in the current request, or FALSE
on failure.
我们可以自己写这个函数:
在PHP里,想要得到所有的HTTP请求头,可以使用getallheaders方法,不过此方法并不是在任何环境下都存在,比如说,你使用fastcgi方式运行PHP的话,就没有这个方法,所以说我们还需要考虑别的方法,幸运的是$_SERVER里有我们想要的东西,它里面键名以HTTP_开头的就是HTTP请求头:$headers = array();
foreach ($_SERVER as $key => $value) {
if ('HTTP_' == substr($key, 0, 5)) {
$headers[str_replace('_', '-', substr($key, 5))] = $value;
}
}
代码很简单,需要说明的是RFC里明确指出了信息头的名字是不区分大小写的。
不过并不是所有的HTTP请求头都是以HTTP_开头的的键的形式存在与$_SERVER里,比如说Authorization,Content-Length,Content-Type就不是这样,所以说为了取得所有的HTTP请求头,还需要加上下面这段代码:
if (isset($_SERVER['PHP_AUTH_DIGEST'])) { $header['AUTHORIZATION'] = $_SERVER['PHP_AUTH_DIGEST']); } elseif (isset($_SERVER['PHP_AUTH_USER']) && isset($_SERVER['PHP_AUTH_PW'])) { $header['AUTHORIZATION'] = base64_encode($_SERVER['PHP_AUTH_USER'] . ':' . $_SERVER['PHP_AUTH_PW'])); } if (isset($_SERVER['CONTENT_LENGTH'])) { $header['CONTENT-LENGTH'] = $_SERVER['CONTENT_LENGTH']; } if (isset($_SERVER['CONTENT_TYPE'])) { $header['CONTENT-TYPE'] = $_SERVER['CONTENT_TYPE']; //注意-和下划线不同 }
http://php.net/manual/zh/function.getallheaders.php
我用$_SERVER['CONTENT_TYPE']出现
Undefined index: CONTENT_TYPE。
curl设置header:http://blog.51yip.com/php/1297.html
curl获取content type
<?php # the request $ch = curl_init('http://www.google.com'); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_exec($ch); # get the content type echo curl_getinfo($ch, CURLINFO_CONTENT_TYPE); # output text/html; charset=ISO-8859-1 ?>
参考:http://stackoverflow.com/questions/2610713/get-mime-type-of-external-file-using-curl-and-php
我们curl_getinfo如果后面只有一个参数,返回一个array:
$httpinfo=curl_getinfo($ch);
print_r( $httpinfo);
返回如:
Array ( [url] => http://www.php10086.com/2012/04/605.html [content_type] => text/html; charset=UTF-8 [http_code] => 200 [header_size] => 344 [request_size] => 71 [filetime] => -1 [ssl_verify_result] => 0 [redirect_count] => 0 [total_time] => 1.545 [namelookup_time] => 0 [connect_time] => 0.172 [pretransfer_time] => 0.172 [size_upload] => 0 [size_download] => 54618 [speed_download] => 35351 [speed_upload] => 0 [download_content_length] => -1 [upload_content_length] => 0 [starttransfer_time] => 0.593 [redirect_time] => 0 [certinfo] => Array ( ) [primary_ip] => 173.254.29.116 [primary_port] => 80 [local_ip] => 192.168.1.5 [local_port] => 49970 [redirect_url] => )