Get headers by using curl in php
Why do needed to get headers?
Sometimes you will have to check a site,page or file existing in online server, get a file or a page length or content type. So try to download or get content by using curl or file_get_content() function to get these details. If it is a large file or page, It will be unnecessary thing. But these details allready contain in header. Header is smaller content. why do wasting time to download page or file?So i wrote this article explain to execute get_headers() function.
First, see this example of below,
print_r(get_headers('url'));
/*
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
) */
print_r(get_headers('url', 1));
/*
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
) */
get_headers function not work sometimes in server, but you can get headers by using curl. So i wrote a code to get same headers results like get_headers return parameters. I think it is helpful for you.
function curl_getheaders($url) {
/*
* Get headers by using curl
* @param (string|optional) $url - The target absolute url of site,page or file.
*
* @return (array) headers.
*
* source path : http://codrate.com/
*/
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_HEADER => true,
CURLOPT_NOBODY => true,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_URL => $url));
$headers = array();
foreach (explode("\n", curl_exec($curl)) as $key => $header) {
if (!$key) {
$headers[] = $header;
} else {
$header = explode(':', $header);
$headers[trim($header[0])] = isset($header[1]) ? trim($header[1]) : '';
}
}
curl_close($curl);
return count($headers) < 2 ? false : $headers;
}
print_r(curl_getheaders('url'));
/*
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
) */
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