Filters the HTTP headers before they're sent to the browser.
$headersstring[]$wpWPwp-includes/class-wp.php:563WP::send_headers() * * @since 2.8.0 * * @param string[] $headers Associative array of headers to be sent. * @param WP $wp Current WordPress environment instance. */ $headers = apply_filters( 'wp_headers', $headers, $this ); if ( ! empty( $status ) ) { status_header( $status ); } // If Last-Modified is set to false, it should not be sent (no-cache situation).Introduced in 2.8.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.