$custom_logo_id = get_theme_mod( 'custom_logo' ); $logo = wp_get_attachment_image_src( $custom_logo_id , 'full' ); if ( has_custom_logo() ) { echo '<img src="' . esc_url( $logo[0] ) . '" alt="' . get_bloginfo( 'name' ) . '">'; } else { echo '<h1>'. get_bloginfo( 'name' ) .'</h1>'; }