Title: WP_Theme_JSON_Resolver::recursively_iterate_json
Published: March 29, 2023
Last modified: April 28, 2025

---

# WP_Theme_JSON_Resolver::recursively_iterate_json( string $dir ): array

## In this article

 * [Parameters](https://developer.wordpress.org/reference/classes/wp_theme_json_resolver/recursively_iterate_json/?output_format=md#parameters)
 * [Return](https://developer.wordpress.org/reference/classes/wp_theme_json_resolver/recursively_iterate_json/?output_format=md#return)
 * [Source](https://developer.wordpress.org/reference/classes/wp_theme_json_resolver/recursively_iterate_json/?output_format=md#source)
 * [Changelog](https://developer.wordpress.org/reference/classes/wp_theme_json_resolver/recursively_iterate_json/?output_format=md#changelog)

[ Back to top](https://developer.wordpress.org/reference/classes/wp_theme_json_resolver/recursively_iterate_json/?output_format=md#wp--skip-link--target)

This function’s access is marked private. This means it is not intended for use 
by plugin or theme developers, only by core. It is listed here for completeness.

Returns an array of all nested JSON files within a given directory.

## 󠀁[Parameters](https://developer.wordpress.org/reference/classes/wp_theme_json_resolver/recursively_iterate_json/?output_format=md#parameters)󠁿

 `$dir`stringrequired

The directory to recursively iterate and list files of.

## 󠀁[Return](https://developer.wordpress.org/reference/classes/wp_theme_json_resolver/recursively_iterate_json/?output_format=md#return)󠁿

 array The merged array.

## 󠀁[Source](https://developer.wordpress.org/reference/classes/wp_theme_json_resolver/recursively_iterate_json/?output_format=md#source)󠁿

    ```php
    private static function recursively_iterate_json( $dir ) {
    	$nested_files      = new RecursiveIteratorIterator( new RecursiveDirectoryIterator( $dir ) );
    	$nested_json_files = iterator_to_array( new RegexIterator( $nested_files, '/^.+\.json$/i', RecursiveRegexIterator::GET_MATCH ) );
    	return $nested_json_files;
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/class-wp-theme-json-resolver.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/6.9.4/src/wp-includes/class-wp-theme-json-resolver.php#L766)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/class-wp-theme-json-resolver.php#L766-L770)

## 󠀁[Changelog](https://developer.wordpress.org/reference/classes/wp_theme_json_resolver/recursively_iterate_json/?output_format=md#changelog)󠁿

| Version | Description | 
| [6.2.0](https://developer.wordpress.org/reference/since/6.2.0/) | Introduced. |

## User Contributed Notes

You must [log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fdeveloper.wordpress.org%2Freference%2Fclasses%2Fwp_theme_json_resolver%2Frecursively_iterate_json%2F)
before being able to contribute a note or feedback.