src/UtmCookie/UtmCookie.php
private static function initStaticValues()
	{
		if (self::$utmCookieName === null) {
			self::$utmCookieName = 'utm';
		}

		self::$utmCookie = [
			'utm_campaign' => null, 
			'utm_medium'   => null, 
			'utm_source'   => null, 
			'utm_term'     => null, 
			'utm_content'  => null
		];

		
		if (self::$lifetime === null) {
			self::$lifetime = new DateInterval(self::DEFAULT_UTM_COOKIE_LIFETIME);
		}

		if (self::$overwrite === null) {
			self::$overwrite = true;
		}
	}
private static function initStaticValues()
	{
		if (self::$utmCookieName === null) {
			self::$utmCookieName = 'utm';
		}

		self::$utmCookie = [
			'utm_campaign' => null, 
			'utm_medium'   => null, 
			'utm_source'   => null, 
			'utm_term'     => null, 
			'utm_content'  => null
		];

		
		if (self::$lifetime === null) {
			self::$lifetime = new DateInterval(self::DEFAULT_UTM_COOKIE_LIFETIME);
		}

		if (self::$overwrite === null) {
			self::$overwrite = true;
		}
	}
Initialize static values to default (or empty) values.