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Add optional callback argument to serialize_block(s) #5185

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Add optional callback argument to serialize_block(s) #5185

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24 changes: 18 additions & 6 deletions src/wp-includes/blocks.php
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Original file line number Diff line number Diff line change
Expand Up @@ -794,16 +794,22 @@ function get_comment_delimited_block_content( $block_name, $block_attributes, $b
* instead preserve the markup as parsed.
*
* @since 5.3.1
* @since 6.4.0 The `$callback` parameter was added.
*
* @param array $block A representative array of a single parsed block object. See WP_Block_Parser_Block.
* @param array $block A representative array of a single parsed block object. See WP_Block_Parser_Block.
* @param string $callback Optional. Callback to run on the block before serialization. Default null.
* @return string String of rendered HTML.
*/
function serialize_block( $block ) {
function serialize_block( $block, $callback = null ) {
if ( is_callable( $callback ) ) {
$block = call_user_func( $callback, $block );
}

$block_content = '';

$index = 0;
foreach ( $block['innerContent'] as $chunk ) {
$block_content .= is_string( $chunk ) ? $chunk : serialize_block( $block['innerBlocks'][ $index++ ] );
$block_content .= is_string( $chunk ) ? $chunk : serialize_block( $block['innerBlocks'][ $index++ ], $callback );
}

if ( ! is_array( $block['attrs'] ) ) {
Expand All @@ -822,12 +828,18 @@ function serialize_block( $block ) {
* parsed blocks.
*
* @since 5.3.1
* @since 6.4.0 The `$callback` parameter was added.
*
* @param array[] $blocks An array of representative arrays of parsed block objects. See serialize_block().
* @param array[] $blocks An array of representative arrays of parsed block objects. See serialize_block().
* @param string $callback Optional. Callback to run on the blocks before serialization. Default null.
* @return string String of rendered HTML.
*/
function serialize_blocks( $blocks ) {
return implode( '', array_map( 'serialize_block', $blocks ) );
function serialize_blocks( $blocks, $callback = null ) {
$result = '';
foreach ( $blocks as $block ) {
$result .= serialize_block( $block, $callback );
};
return $result;
}

/**
Expand Down