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WP_Network::_set_cookie_domain()

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.

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 );
		}
	}

Changelog

Version Description
4.4.0 Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/classes/wp_network/_set_cookie_domain