Title: WP_Dependencies::add_data
Published: April 25, 2014
Last modified: August 20, 2026

---

# WP_Dependencies::add_data( string $handle, string $key, mixed $value ): bool

## In this article

 * [Description](https://developer.wordpress.org/reference/classes/WP_Dependencies/add_data/?output_format=md#description)
 * [Parameters](https://developer.wordpress.org/reference/classes/WP_Dependencies/add_data/?output_format=md#parameters)
 * [Return](https://developer.wordpress.org/reference/classes/WP_Dependencies/add_data/?output_format=md#return)
 * [Source](https://developer.wordpress.org/reference/classes/WP_Dependencies/add_data/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/classes/WP_Dependencies/add_data/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/classes/WP_Dependencies/add_data/?output_format=md#changelog)

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

Add extra item data.

## 󠀁[Description](https://developer.wordpress.org/reference/classes/WP_Dependencies/add_data/?output_format=md#description)󠁿

Adds data to a registered item.

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

 `$handle`stringrequired

Name of the item. Should be unique.

`$key`stringrequired

The data key.

`$value`mixedrequired

The data value.

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

 bool True on success, false on failure.

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

    ```php
    public function add_data( $handle, $key, $value ) {
    	if ( ! isset( $this->registered[ $handle ] ) ) {
    		return false;
    	}
    	if ( 'conditional' === $key && '_required-conditional-dependency_' !== $value ) {
    		_deprecated_argument(
    			'WP_Dependencies->add_data()',
    			'6.9.0',
    			__( 'IE conditional comments are ignored by all supported browsers.' )
    		);
    	}

    	return $this->registered[ $handle ]->add_data( $key, $value );
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes_class-wp-dependencies-php-2/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.1/src/wp-includes/class-wp-dependencies.php#L313)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-dependencies.php#L313-L326)

## 󠀁[Related](https://developer.wordpress.org/reference/classes/WP_Dependencies/add_data/?output_format=md#related)󠁿

| Uses | Description | 
| [__()](https://developer.wordpress.org/reference/functions/__/)`wp-includes/l10n.php` |

Retrieves the translation of $text.

  | 
| [_deprecated_argument()](https://developer.wordpress.org/reference/functions/_deprecated_argument/)`wp-includes/functions.php` |

Marks a function argument as deprecated and inform when it has been used.

  |

| Used by | Description | 
| [WP_Styles::add_data()](https://developer.wordpress.org/reference/classes/wp_styles/add_data/)`wp-includes/class-wp-styles.php` |

Overrides the add_data method from [WP_Dependencies](https://developer.wordpress.org/reference/classes/wp_dependencies/), to allow unsetting dependencies for conditional styles.

  | 
| [WP_Scripts::add_data()](https://developer.wordpress.org/reference/classes/wp_scripts/add_data/)`wp-includes/class-wp-scripts.php` |

This overrides the add_data method from [WP_Dependencies](https://developer.wordpress.org/reference/classes/wp_dependencies/), to support normalizing of $args.

  |

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

| Version | Description | 
| [2.6.0](https://developer.wordpress.org/reference/since/2.6.0/) | Introduced. |

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