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function is not described

_doing_it_wrong() WP 3.1.0

Mark something as being incorrectly called.

There is a hook doing_it_wrong_run that will be called that can be used to get the backtrace up to what file and function called the deprecated function.

The current behavior is to trigger a user error if WP_DEBUG is true.

This is an internal function for using it by WP core itself. It's not recommended to use this function in your code.

Return

null. Nothing.

Usage

_doing_it_wrong( $function, $message, $version );
$function(string) (required)
The function that was called.
$message(string) (required)
A message explaining what has been done incorrectly.
$version(string) (required)
The version of WordPress where the message was added.

Changelog

Since 3.1.0 Introduced.
Since 5.4.0 This function is no longer marked as "private".

Code of _doing_it_wrong() WP 5.8.2

function _doing_it_wrong( $function, $message, $version ) {

	/**
	 * Fires when the given function is being used incorrectly.
	 *
	 * @since 3.1.0
	 *
	 * @param string $function The function that was called.
	 * @param string $message  A message explaining what has been done incorrectly.
	 * @param string $version  The version of WordPress where the message was added.
	 */
	do_action( 'doing_it_wrong_run', $function, $message, $version );

	/**
	 * Filters whether to trigger an error for _doing_it_wrong() calls.
	 *
	 * @since 3.1.0
	 * @since 5.1.0 Added the $function, $message and $version parameters.
	 *
	 * @param bool   $trigger  Whether to trigger the error for _doing_it_wrong() calls. Default true.
	 * @param string $function The function that was called.
	 * @param string $message  A message explaining what has been done incorrectly.
	 * @param string $version  The version of WordPress where the message was added.
	 */
	if ( WP_DEBUG && apply_filters( 'doing_it_wrong_trigger_error', true, $function, $message, $version ) ) {
		if ( function_exists( '__' ) ) {
			if ( $version ) {
				/* translators: %s: Version number. */
				$version = sprintf( __( '(This message was added in version %s.)' ), $version );
			}

			$message .= ' ' . sprintf(
				/* translators: %s: Documentation URL. */
				__( 'Please see <a href="%s">Debugging in WordPress</a> for more information.' ),
				__( 'https://wordpress.org/support/article/debugging-in-wordpress/' )
			);

			trigger_error(
				sprintf(
					/* translators: Developer debugging message. 1: PHP function name, 2: Explanatory message, 3: WordPress version number. */
					__( '%1$s was called <strong>incorrectly</strong>. %2$s %3$s' ),
					$function,
					$message,
					$version
				),
				E_USER_NOTICE
			);
		} else {
			if ( $version ) {
				$version = sprintf( '(This message was added in version %s.)', $version );
			}

			$message .= sprintf(
				' Please see <a href="%s">Debugging in WordPress</a> for more information.',
				'https://wordpress.org/support/article/debugging-in-wordpress/'
			);

			trigger_error(
				sprintf(
					'%1$s was called <strong>incorrectly</strong>. %2$s %3$s',
					$function,
					$message,
					$version
				),
				E_USER_NOTICE
			);
		}
	}
}