resolve_pattern_blocks( array $blocks ): array

Source

 *     An associative array of a single parsed block object. See WP_Block_Parser_Block.
 *
 *     @type string   $blockName    Name of block.
 *     @type array    $attrs        Attributes from block comment delimiters.
 *     @type array[]  $innerBlocks  List of inner blocks. An array of arrays that
 *                                  have the same structure as this one.
 *     @type string   $innerHTML    HTML from inside block comment delimiters.
 *     @type array    $innerContent List of string fragments and null markers where
 *                                  inner blocks were found.
 * }
 * @return string String of rendered HTML.
 */
function serialize_block( $block ) {
	$block_content = '';

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

	if ( ! is_array( $block['attrs'] ) ) {
		$block['attrs'] = array();
	}

	return get_comment_delimited_block_content(
		$block['blockName'],
		$block['attrs'],
		$block_content
	);
}

/**
 * Returns a joined string of the aggregate serialization of the given
 * parsed blocks.
 *
 * @since 5.3.1
 *
 * @param array[] $blocks {
 *     Array of block structures.
 *
 *     @type array ...$0 {
 *         An associative array of a single parsed block object. See WP_Block_Parser_Block.
 *
 *         @type string   $blockName    Name of block.
 *         @type array    $attrs        Attributes from block comment delimiters.
 *         @type array[]  $innerBlocks  List of inner blocks. An array of arrays that
 *                                      have the same structure as this one.
 *         @type string   $innerHTML    HTML from inside block comment delimiters.
 *         @type array    $innerContent List of string fragments and null markers where
 *                                      inner blocks were found.
 *     }
 * }
 * @return string String of rendered HTML.
 */
function serialize_blocks( $blocks ) {
	return implode( '', array_map( 'serialize_block', $blocks ) );
}

/**
 * Traverses a parsed block tree and applies callbacks before and after serializing it.
 *
 * Recursively traverses the block and its inner blocks and applies the two callbacks provided as
 * arguments, the first one before serializing the block, and the second one after serializing it.
 * If either callback returns a string value, it will be prepended and appended to the serialized
 * block markup, respectively.
 *
 * The callbacks will receive a reference to the current block as their first argument, so that they

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