Retrieve only the headers from the raw response.
<?php wp_remote_retrieve_headers( $response ); ?>
An example of returned values
[headers] => Array ( [date] => Thu, 30 Sep 2010 15:16:36 GMT [server] => Apache [x-powered-by] => PHP/5.3.3 [x-server] => 10.90.6.243 [expires] => Thu, 30 Sep 2010 03:16:36 GMT [cache-control] => Array ( [0] => no-store, no-cache, must-revalidate [1] => post-check=0, pre-check=0 ) [vary] => Accept-Encoding [content-length] => 1641 [connection] => close [content-type] => application/php )
$response = wp_remote_get('http://www.foo.com/file.txt'); $headers = wp_remote_retrieve_headers( $response );
$headers will contain an array of the headers returned by the server
Since: 2.7.0
wp_remote_retrieve_headers() is located in wp-includes/http.php