Redirect from Array

function custom_redirect_old_new_urls() {

    $redirect_urls = array(

        '/oldpage/' => '/newpage/',

		'/oldpage1/' => '/newpage1/',

		// Add more URLs here

    );

    $request_uri = home_url( add_query_arg( array(), $_SERVER['REQUEST_URI'] ) );

    foreach ( $redirect_urls as $old_url => $new_url ) {

        if ( untrailingslashit( $request_uri ) === untrailingslashit( home_url( $old_url ) ) ) {

            wp_redirect( home_url( $new_url ), 301 );

            exit;

        }

    }

}

add_action('template_redirect', 'custom_redirect_old_new_urls');