_remove_theme_attribute_in_block_template_content() │ WP 5.9.0

Deprecated since 6.4.0. It is no longer supported and may be removed in future releases. Use traverse_and_serialize_blocks( parse_blocks( $template_content ), '_remove_theme_attribute_from_template_part_block' ) instead.

Parses a block template and removes the theme attribute from each template part.

Internal function — this function is designed to be used by the kernel itself. It is not recommended to use this function in your code.

No Hooks.

Returns

String. Updated block template content.

Usage

_remove_theme_attribute_in_block_template_content( $template_content );
$template_content(string) (required)
Serialized block template content.

Changelog

Since 5.9.0 Introduced.
Deprecated since 6.4.0 Use traverse_and_serialize_blocks( parse_blocks( $template_content ), '_remove_theme_attribute_from_template_part_block' ) instead.

_remove_theme_attribute_in_block_template_content() code WP 6.8.3

wp-includes/deprecated.php 
function _remove_theme_attribute_in_block_template_content( $template_content ) {
	_deprecated_function(
		__FUNCTION__,
		'6.4.0',
		'traverse_and_serialize_blocks( parse_blocks( $template_content ), "_remove_theme_attribute_from_template_part_block" )'
	);

	$has_updated_content = false;
	$new_content         = '';
	$template_blocks     = parse_blocks( $template_content );

	$blocks = _flatten_blocks( $template_blocks );
	foreach ( $blocks as $key => $block ) {
		if ( 'core/template-part' === $block['blockName'] && isset( $block['attrs']['theme'] ) ) {
			unset( $blocks[ $key ]['attrs']['theme'] );
			$has_updated_content = true;
		}
	}

	if ( ! $has_updated_content ) {
		return $template_content;
	}

	foreach ( $template_blocks as $block ) {
		$new_content .= serialize_block( $block );
	}

	return $new_content;
}