Fix PHP notice when an image with lightbox is deleted in the behaviors file

[afercia]

Follow-up to #55370

What?

Aookues the same fix from #55370 to the behaviiors file.

Why?

How?

Testing Instructions

Not sure how to make a theme use the behaviors.php file, but to my understanding thie file may be still used.
This change only applies the wame efix for the Image block from #55370

Testing Instructions for Keyboard

Screenshots or screencast

[github-actions]

This pull request has changed or added PHP files. Please confirm whether these changes need to be synced to WordPress Core, and therefore featured in the next release of WordPress.

If so, it is recommended to create a new Trac ticket and submit a pull request to the WordPress Core Github repository soon after this pull request is merged.

If you're unsure, you can always ask for help in the #core-editor channel in WordPress Slack.

Thank you! ❤️

View changed files

❔ lib/block-supports/behaviors.php

[github-actions]

Flaky tests detected in c71c8ec.
Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/6534471543
📝 Reported issues:

• [Flaky Test] should partially select with shift + click (@webkit) #53524 in /test/e2e/specs/editor/various/multi-block-selection.spec.js

[SiobhyB]

@michalczaplinski, @afercia, 👋 , just wanted to double-check whether this should be backported for tomorrow's RC1 once merged?

[michalczaplinski]

Thanks for this @afercia !

Just a note that the behaviors.php file is kept in Gutenberg ONLY for backwards-compatibility with the previous version of the Lightbox, which used "behaviors" and will be removed in a future GB version. It was never shipped in Core and should not be backported now:

gutenberg/lib/block-supports/behaviors.php

Lines 5 to 7 in 5a04a2b

	* This file will NOT be backported to Core. It exists to provide a
	* migration path for theme.json files that used the deprecated "behaviors".
	* This file will be removed from Gutenberg in version 17.0.0.

I removed the [backport to WP RC] label.

[michalczaplinski]

@michalczaplinski, @afercia, 👋 , just wanted to double-check whether this should be backported for tomorrow's RC1 once merged?

@SiobhyB Nope, should not be backported!

[afercia]

Just a note that the behaviors.php file is kept in Gutenberg ONLY for backwards-compatibility with the previous version of the Lightbox, which used "behaviors" and will be removed in a future GB version.

Thanks for the clarification @michalczaplinski.
Then I guess it can be merged to fix the plugin previous implementation.

[getdave]

✅ I updated the PHP Sync Tracking Issue for WP 6.5 to note this PR does not require a backport for WP 6.5.