wp_get_http_headers()WP 1.5.1

Retrieve HTTP Headers from URL.

No Hooks.

Return

String|false. Headers on success, false on failure.

Usage

wp_get_http_headers( $url, $deprecated );
$url(string) (required)
URL to retrieve HTTP headers from.
$deprecated(true|false)
Not Used.
Default: false

Examples

0

#1 Get HTTP headers by URL

Sometimes it is enough to get HTTP headers instead of getting all the content of the specified URL. Getting a server response is usually 2-3 times faster:

$r = wp_get_http_headers( 'http://wordpress.org' );
print_r( $r );

this code will display such an array:

Array
(
	[server] => nginx
	[date] => Sun, 02 Nov 2014 20:39:35 GMT
	[content-type] => text/html
	[content-length] => 154
	[connection] => close
	[location] => https://wordpress.org/
)
0

#2 Processing GET request

We can send a GET request by receiving headers only and it will be processed by remote server. For example, we need to trigger the following URL to run some task: http://example.com?foo=param:

wp_get_http_headers( 'http://example.com?foo=param' );

Changelog

Since 1.5.1 Introduced.

Code of wp_get_http_headers() WP 6.0.1

function wp_get_http_headers( $url, $deprecated = false ) {
	if ( ! empty( $deprecated ) ) {
		_deprecated_argument( __FUNCTION__, '2.7.0' );
	}

	$response = wp_safe_remote_head( $url );

	if ( is_wp_error( $response ) ) {
		return false;
	}

	return wp_remote_retrieve_headers( $response );
}