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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 76 | |
| 77 | /** |
| 78 | * Filters the default array of categories for block types. |
| 79 | * |
| 80 | * @since 5.8.0 |
| 81 | * |
| 82 | * @param array[] $block_categories Array of categories for block types. |
| 83 | * @param WP_Block_Editor_Context $block_editor_context The current block editor context. |
| 84 | */ |
| 85 | $block_categories = apply_filters( 'block_categories_all', $block_categories, $block_editor_context ); |
| 86 | if ( ! empty( $block_editor_context->post ) ) { |
| 87 | $post = $block_editor_context->post; |
| 88 | |
| 89 | /** |
| 90 | * Filters the default array of categories for block types. |
| 91 | * |
| 92 | * @since 5.0.0 |
| 93 | * @deprecated 5.8.0 Use the {@see 'block_categories_all'} filter instead. |
| 94 | * |