WordPress: check user role and add inline css

wp_get_current_user_inline_css.php

/**
				 * http://wordpress.stackexchange.com/questions/131814/if-current-user-is-admin-or-editor
				 * set wpadminbar to position fixed to work with UD Theme 8/29/15 CL
				 */
				$user = wp_get_current_user();
				$allowed_roles = array('editor', 'administrator', 'author');
				 if( array_intersect($allowed_roles, $user->roles ) )

				$custom_css =
					"@media screen and (max-width:600px) {#wpadminbar {position: fixed !important;}}".'/n';
					"@media only screen and (max-width:48em) {#wpadminbar {position:fixed !important;}}".'/n';
				wp_add_inline_style( $this->sb_bar .'-admin-styles', $custom_css );