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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 |
|---|---|
| 546 | |
| 547 | foreach ( $this->inner_content as $chunk ) { |
| 548 | if ( is_string( $chunk ) ) { |
| 549 | $block_content .= $chunk; |
| 550 | } else { |
| 551 | $inner_block = $this->inner_blocks[ $index ]; |
| 552 | $parent_block = $this; |
| 553 | |
| 554 | /** This filter is documented in wp-includes/blocks.php */ |
| 555 | $pre_render = apply_filters( 'pre_render_block', null, $inner_block->parsed_block, $parent_block ); |
| 556 | |
| 557 | if ( ! is_null( $pre_render ) ) { |
| 558 | $block_content .= $pre_render; |
| 559 | } else { |
| 560 | $source_block = $inner_block->parsed_block; |
| 561 | $inner_block_context = $inner_block->context; |
| 562 | |
| 563 | /** This filter is documented in wp-includes/blocks.php */ |
| 564 | $inner_block->parsed_block = apply_filters( 'render_block_data', $inner_block->parsed_block, $source_block, $parent_block ); |