PHP get_headers function Use method to parse what the header means PHP header kernel headers

In PHP development, we often need to get the server information sent in the HTTP request, this article through a simple PHP example of the Get_headers function to obtain information about the server.

Get_headers () is a PHP system-level function that returns an array containing the headers sent by the server in response to an HTTP request. If it fails, it returns false and emits an e_warning level error message (which can be used to determine if the remote file exists).

function definition

Array get_headers (string $url [, int $format = 0])

Parameters

URL Destination URL

Format if the optional format parameter is set to 1, Get_headers () parses the corresponding information and sets the array's key name.

Example

The output of the above routines is similar to the following:

Array (    [0] = http/1.1 [    1] = Date:sat, May 2004 12:28:13 GMT    [2] = server:apache/1.3.27 (Unix)  (Red-hat/linux)    [3] = last-modified:wed, Jan 2003 23:11:55 GMT    [4] = ETag: "3f80f-1b6-3e1cb03b"    [5] = = Accept-range S:bytes    [6] = content-length:438    [7] = Connection:close    [8] = content-type:text/html) Array ( C10/>[0] = http/1.1    [Date] + Sat, May 2004 12:28:14 GMT    [Server] + apache/1.3.27 (Unix) 
   (Red-hat/linux)    [last-modified] = Wed, Jan 2003 23:11:55 GMT    [ETag] = "3f80f-1b6-3e1cb03b"    [accept-ranges] = bytes    [Content-length] = 438    [Connection] = Close    [Content-type] = text/html)

The above introduces the use of get_headers function in PHP parsing, including the headers aspects of the content, I hope that the PHP tutorial interested in a friend helpful.

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