wp_headers filter-hook . WP 2.8.0

Filters the HTTP headers before they're sent to the browser.

Usage

add_filter( 'wp_headers', 'filter_function_name_8385', 10, 2 );
function filter_function_name_8385( $headers, $wp ){
	// filter...

	return $headers;
}

$headers(string[])

Associative array of headers to be sent.

$wp(WP)

Current WordPress environment instance.

Changelog

Where the hook is called

$headers = apply_filters( 'wp_headers', $headers, $this );

Where in WP core the hook is used WordPress

add_filter( 'wp_headers', array( $this, 'filter_iframe_security_headers' ) );