'; echo "\r\n"; } add_action( 'wp_head', 'wpex_x_ua_compatible_meta_tag', 1 ); /** * Filters the HTTP headers before they’re sent to the browser. * * @since 4.0 */ function wpex_x_ua_compatible_headers( $headers ) { $headers['X-UA-Compatible'] = 'IE=edge'; return $headers; } add_filter( 'wp_headers', 'wpex_x_ua_compatible_headers' );