Here is the cURL config to request just the response headers with the cURL library
[code language=“php“]
/*
Outputs an array of response headers similar to:
Array
(
[0] => HTTP/1.1 200 OK
[1] => Server: nginx
[2] => Date: Wed, 21 Aug 2013 15:04:45 GMT
[3] => Content-Type: text/html; charset=utf-8
[4] => Connection: keep-alive
[5] => Vary: Accept-Encoding
[6] => Vary: Cookie
[7] => Set-Cookie: wordpress_homepage=existing; expires=Thu, 05-Sep-2013 15:04:45 GMT
[8] =>
[9] =>
)
*/
function get_url_headers( $url ) {
$curl = curl_init();
curl_setopt( $curl, CURLOPT_URL, $url );
curl_setopt( $curl, CURLOPT_FILETIME, true );
curl_setopt( $curl, CURLOPT_NOBODY, true );
curl_setopt( $curl, CURLOPT_RETURNTRANSFER, true );
curl_setopt( $curl, CURLOPT_HEADER, true );
$headers = curl_exec( $curl );
$headers = explode( "\r\n", $headers );
curl_close($curl);
return $headers;
}
[/code]
This function will return the response headers in an array. This will allow you to easily iterate through the headers to check the response status and/or if a particular header is set.