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

WP_Network::_set_cookie_domain()

Set the cookie domain based on the network domain if one has not been populated.

Source

File: wp-includes/class-wp-network.php

	private function _set_cookie_domain() {
		if ( ! empty( $this->cookie_domain ) ) {
			return;
		}

		$this->cookie_domain = $this->domain;
		if ( 'www.' === substr( $this->cookie_domain, 0, 4 ) ) {
			$this->cookie_domain = substr( $this->cookie_domain, 4 );
		}
	}

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Changelog

Changelog
Version	Description
WP-4.4.0	Introduced.