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add_user

Definition:
function add_user() {}

Creates a new user from the "Users" form using $_POST information.
It seems that the first half is for backwards compatibility, but only has the ability to alter the user’s role. WordPress core seems to use this function only in the second way, running edit_user() with no id so as to create a new user.

Parameters

  • int $user_id: Optional. User ID.

Return values

returns:Null when adding user, WP_Error or User ID integer when no parameters.

Source code

function add_user() {

	if ( func_num_args() ) { // The hackiest hack that ever did hack

		global $wp_roles;

		$user_id = (int) func_get_arg( 0 );



		if ( isset( $_POST['role'] ) ) {

			$new_role = sanitize_text_field( $_POST['role'] );

			// Don't let anyone with 'edit_users' (admins) edit their own role to something without it.

			if ( $user_id != get_current_user_id() || $wp_roles->role_objects[$new_role]->has_cap( 'edit_users' ) ) {

				// If the new role isn't editable by the logged-in user die with error

				$editable_roles = get_editable_roles();

				if ( empty( $editable_roles[$new_role] ) )

					wp_die(__('You can’t give users that role.'));



				$user = new WP_User( $user_id );

				$user->set_role( $new_role );

			}

		}

	} else {

		add_action( 'user_register', 'add_user' ); // See above

		return edit_user();

	}

}

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