WordPress 6.0: Examples on how to restrict block locking in the UI

wordpress-6-0-block-locking.php

<?php
/**
 * Examples on restricting when blocks can be locked using the UI.
 * Based on the example provided by @mamaduka in https://github.com/WordPress/gutenberg/pull/39566
 *
 * @see https://developer.wordpress.org/reference/hooks/block_editor_settings_all/
 */
add_filter(
	'block_editor_settings_all',
	function( $settings, $context ) {

		// Allow for the Editor role and above - https://wordpress.org/support/article/roles-and-capabilities/.
		$settings['canLockBlocks'] = current_user_can( 'delete_others_posts' );

		// Only enable for specific user(s).
		$user = wp_get_current_user();
		if ( in_array( $user->user_email, array( 'username@example.com' ), true ) ) {
			$settings['canLockBlocks'] = false;
		}

		// Disable for posts/pages.
		if ( $context->post && 'page' === $context->post->post_type ) {
			$settings['canLockBlocks'] = false;
		}

		return $settings;
	},
	10,
	2
);