Title: AbstractEnum::camelCaseToConstant
Published: May 20, 2026

---

# AbstractEnum::camelCaseToConstant( string $camelCase ): string

## In this article

 * [Parameters](https://developer.wordpress.org/reference/classes/wordpress-aiclient-common-abstractenum/camelcasetoconstant/?output_format=md#parameters)
 * [Return](https://developer.wordpress.org/reference/classes/wordpress-aiclient-common-abstractenum/camelcasetoconstant/?output_format=md#return)
 * [Source](https://developer.wordpress.org/reference/classes/wordpress-aiclient-common-abstractenum/camelcasetoconstant/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/classes/wordpress-aiclient-common-abstractenum/camelcasetoconstant/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/classes/wordpress-aiclient-common-abstractenum/camelcasetoconstant/?output_format=md#changelog)

[ Back to top](https://developer.wordpress.org/reference/classes/wordpress-aiclient-common-abstractenum/camelcasetoconstant/?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.

Converts camelCase to CONSTANT_CASE.

## 󠀁[Parameters](https://developer.wordpress.org/reference/classes/wordpress-aiclient-common-abstractenum/camelcasetoconstant/?output_format=md#parameters)󠁿

 `$camelCase`stringrequired

The camelCase string.

## 󠀁[Return](https://developer.wordpress.org/reference/classes/wordpress-aiclient-common-abstractenum/camelcasetoconstant/?output_format=md#return)󠁿

 string The CONSTANT_CASE version.

## 󠀁[Source](https://developer.wordpress.org/reference/classes/wordpress-aiclient-common-abstractenum/camelcasetoconstant/?output_format=md#source)󠁿

    ```php
    private static function camelCaseToConstant(string $camelCase): string
    {
        $snakeCase = preg_replace('/([a-z])([A-Z])/', '$1_$2', $camelCase);
        if ($snakeCase === null) {
            return strtoupper($camelCase);
        }
        return strtoupper($snakeCase);
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/php-ai-client/src/common/abstractenum.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-includes/php-ai-client/src/Common/AbstractEnum.php#L318)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/php-ai-client/src/Common/AbstractEnum.php#L318-L325)

## 󠀁[Related](https://developer.wordpress.org/reference/classes/wordpress-aiclient-common-abstractenum/camelcasetoconstant/?output_format=md#related)󠁿

| Used by | Description | 
| [AbstractEnum::__call()](https://developer.wordpress.org/reference/classes/wordpress-aiclient-common-abstractenum/__call/)`wp-includes/php-ai-client/src/Common/AbstractEnum.php` |

Handles dynamic method calls for enum checking.

  | 
| [AbstractEnum::__callStatic()](https://developer.wordpress.org/reference/classes/wordpress-aiclient-common-abstractenum/__callstatic/)`wp-includes/php-ai-client/src/Common/AbstractEnum.php` |

Handles static method calls for enum creation.

  |

## 󠀁[Changelog](https://developer.wordpress.org/reference/classes/wordpress-aiclient-common-abstractenum/camelcasetoconstant/?output_format=md#changelog)󠁿

| Version | Description | 
| [0.1.0](https://developer.wordpress.org/reference/since/0.1.0/) | Introduced. |

## User Contributed Notes

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