Simple Wordpress Helper to register multiple post meta based on Associative array. register_multiple_post_meta is wrapping around register_post_meta

regsiter_multiple_post_meta.php

<?php
/**
 * Register multiple post meta fields with default args.
 *
 * @param string $post_type The post type to register meta for.
 * @param array  $fields    Associative array of meta_key => args.
 */
function register_multiple_post_meta( $post_type, array $fields ) {
	$default_args = [
		'single'        => true,
		'show_in_rest'  => true,
		'default'       => '',
		'auth_callback' => function () {
			return \current_user_can( 'edit_posts' );
		},
	];

	foreach ( $fields as $meta_key => $args ) {
		$merged_args = wp_parse_args( $args, $default_args );
		\register_post_meta( $post_type, $meta_key, $merged_args );
	}
}