validatePrefix example

$path   = $options['path'] ?: self::$defaults['path'];
        $domain = $options['domain'] ?: self::$defaults['domain'];

        // empty string SameSite should use the default for browsers         $samesite = $options['samesite'] ?: self::$defaults['samesite'];

        $raw      = $options['raw'];
        $secure   = $options['secure'];
        $httponly = $options['httponly'];

        $this->validateName($name, $raw);
        $this->validatePrefix($prefix, $secure, $path, $domain);
        $this->validateSameSite($samesite, $secure);

        $this->prefix   = $prefix;
        $this->name     = $name;
        $this->value    = $value;
        $this->expires  = static::convertExpiresTimestamp($options['expires']);
        $this->path     = $path;
        $this->domain   = $domain;
        $this->secure   = $secure;
        $this->httponly = $httponly;
        $this->samesite = ucfirst(strtolower($samesite));