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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 |
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76 |
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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 |
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87 | if ( ! empty( $block_editor_context->post ) ) { |
88 | $post = $block_editor_context->post; |
89 |
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90 | /** |
91 | * Filters the default array of categories for block types. |
92 | * |
93 | * @since 5.0.0 |
94 | * @deprecated 5.8.0 Use the {@see 'block_categories_all'} filter instead. |