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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 |
|---|---|
| 642 | * Filters the content of a single block. |
| 643 | * |
| 644 | * @since 5.0.0 |
| 645 | * @since 5.9.0 The `$instance` parameter was added. |
| 646 | * |
| 647 | * @param string $block_content The block content. |
| 648 | * @param array $block The full block, including name and attributes. |
| 649 | * @param WP_Block $instance The block instance. |
| 650 | */ |
| 651 | $block_content = apply_filters( 'render_block', $block_content, $this->parsed_block, $this ); |
| 652 | |
| 653 | /** |
| 654 | * Filters the content of a single block. |
| 655 | * |
| 656 | * The dynamic portion of the hook name, `$name`, refers to |
| 657 | * the block name, e.g. "core/paragraph". |
| 658 | * |
| 659 | * @since 5.7.0 |
| 660 | * @since 5.9.0 The `$instance` parameter was added. |