Performance: Replace array_key_exists() with isset() check.

[Soean]

What?

This was raised as part of #56974, which reviewed several of these checks. isset is slightly preferable over array_key_exists in terms of performance (with the caveat that the two behave differently when it comes to null values).

See: https://core.trac.wordpress.org/ticket/57067

The PHP minimum version was bumped to PHP 7.0 in #52982, so we can update it now.

[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/class-wp-theme-json-gutenberg.php

[github-actions]

Flaky tests detected in 9a2b6d3.
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/5689757482
📝 Reported issues:

• [Flaky Test] should load styles added through enqueue_block_assets #53088 in specs/editor/plugins/iframed-equeue-block-assets.test.js