The plugin should have no notices on PHP 7.4

[Benunc]

Bug Report

User Story

As a user, I want the plugin to function in PHP 7.4 with no notices.

Current Behavior

When processing a rollback, theres a notice of

Notice: compact(): Undefined variable: title in /Users/steward/Local Sites/flyfest/app/public/wp-content/plugins/wp-rollback/includes/rollback-action.php on line 37
--

1 | 0.0001 | 374048 | {main}( ) | .../index.php:0
2 | 0.0001 | 375296 | require_once( '/Users/steward/Local Sites/flyfest/app/public/wp-admin/admin.php' ) | .../index.php:10
3 | 0.4791 | 4041032 | do_action( ) | .../admin.php:254
4 | 0.4791 | 4041408 | WP_Hook->do_action( ) | .../plugin.php:478
5 | 0.4791 | 4041408 | WP_Hook->apply_filters( ) | .../class-wp-hook.php:311
6 | 0.4792 | 4042536 | WP_Rollback->html( ) | .../class-wp-hook.php:287
7 | 0.4809 | 4069872 | include( '/Users/steward/Local Sites/flyfest/app/public/wp-content/plugins/wp-rollback/includes/rollback-action.php' ) | .../wp-rollback.php:368
8 | 0.4809 | 4070464 | compact ( )

Expected Behavior

I expect no notices.

Bug Type

• [x] I am not sure whether this functionality ever worked as expected.

Steps to Reproduce

1. Install the plugin on PHP 7.4
2. Turn on Debug
3. Rollback any plugin.
4. See error

Related

ticket on priority: https://secure.helpscout.net/conversation/1231893510/70625?folderId=2452562 free support: https://wordpress.org/support/topic/php-notice-161/

Acceptance Criteria

• [x] no notices on rollback
• [x] rollback still works

[DevinWalker]

This was fixed here: 192f6be214ac534dedf0a4fd392b4b735bd23d1e and fully tested on PHP 5.6, 7.2, and 7.4.