post_custom_meta_box( WP_Post $post )

813function post_custom_meta_box( $post ) {814	?>815<div id="postcustomstuff">816<div id="ajax-response"></div>817	<?php818	$metadata = has_meta( $post->ID );819	foreach ( $metadata as $key => $value ) {820		if ( is_protected_meta( $metadata[ $key ]['meta_key'], 'post' ) || ! current_user_can( 'edit_post_meta', $post->ID, $metadata[ $key ]['meta_key'] ) ) {821			unset( $metadata[ $key ] );822		}823	}824	list_meta( $metadata );825	meta_form( $post );826	?>827</div>828<p>829	<?php830	printf(831		/* translators: %s: Documentation URL. */832		__( 'Custom fields can be used to add extra metadata to a post that you can <a href="%s">use in your theme</a>.' ),833		__( 'https://wordpress.org/documentation/article/assign-custom-fields/' )834	);835	?>836</p>837	<?php838}