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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 |
|---|---|
| 446 | |
| 447 | /** |
| 448 | * Allows render_block() to be shortcircuited, by returning a non-null value. |
| 449 | * |
| 450 | * @since 5.1.0 |
| 451 | * |
| 452 | * @param string|null $pre_render The pre-rendered content. Default null. |
| 453 | * @param array $block The block being rendered. |
| 454 | */ |
| 455 | $pre_render = apply_filters( 'pre_render_block', null, $block ); |
| 456 | if ( ! is_null( $pre_render ) ) { |
| 457 | return $pre_render; |
| 458 | } |
| 459 | |
| 460 | $source_block = $block; |
| 461 | |
| 462 | /** |
| 463 | * Filters the block being rendered in render_block(), before it's processed. |
| 464 | * |