PHP Deprecated : Hook block_categories

With the plugin activated, the following messages are showing up in my debug log. PHP Deprecated: Hook block_categories is deprecated since version 5.8.0! Use block_categories_all instead. in /path/to/wp-includes/functions.php on line 5754 PHP Deprecated: Hook block_categories is deprecated since version 5.8.0! Use block_categories_all instead. in /path/to/wp-includes/functions.php on line 5754 Fixed it with this: /path/to/wp-content/plugins/block-for-font-awesome/block-for-font-awesome.php line 103 add_filter( 'block_categories', 'getbutterfly_block_categories', 10, 2 ); change to: if ( version_compare( get_bloginfo( 'version' ), '5.8', '>=' ) ) { add_filter( 'block_categories_all', 'getbutterfly_block_categories', 10, 2 ); } else { add_filter( 'block_categories', 'getbutterfly_block_categories', 10, 2 ); } Hope to see an update soon 🙂 Looked at my code for a few minutes and wasn’t happy with it. Too long. I turned your 1-liner into a 15-liner 🙁 Here’s a 1-liner instead: add_filter( 'block_categories'.( ( version_compare( get_bloginfo( 'version' ), '5.8', '>=' ) ) ? '_all' : '' ), 'getbutterfly_block_categories', 10, 2 ); Marking as solved. Thanks for the code. I have updated the plugin and made the block_categories_all default. I have also increased the WordPress version requirement to 5.8+. The block editor is making some huge jumps, and it’s not worth maintaining 2 versions. The next release of this plugin will include some WordPress 5.9 changes to the colour picker, so it will make version below 5.8 irrelevant anyway. Thanks again!