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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 |
|---|---|
| 1012 | * Filters the block being rendered in render_block(), before it's processed. |
| 1013 | * |
| 1014 | * @since 5.1.0 |
| 1015 | * @since 5.9.0 The `$parent_block` parameter was added. |
| 1016 | * |
| 1017 | * @param array $parsed_block The block being rendered. |
| 1018 | * @param array $source_block An un-modified copy of $parsed_block, as it appeared in the source content. |
| 1019 | * @param WP_Block|null $parent_block If this is a nested block, a reference to the parent block. |
| 1020 | */ |
| 1021 | $parsed_block = apply_filters( 'render_block_data', $parsed_block, $source_block, $parent_block ); |
| 1022 | |
| 1023 | $context = array(); |
| 1024 | |
| 1025 | if ( $post instanceof WP_Post ) { |
| 1026 | $context['postId'] = $post->ID; |
| 1027 | |
| 1028 | /* |
| 1029 | * The `postType` context is largely unnecessary server-side, since the ID |
| 1030 | * is usually sufficient on its own. That being said, since a block's |