PHP Warning: “continue” targeting switch is equivalent to “break”. Did you mean to use “continue 2”?

1.error
・php-fpmをrestartすると/var/log/php-fpm/www-error.logに以下のerrorが出るようになった。

PHP Warning:  "continue" targeting switch is equivalent to "break". 
Did you mean to use "continue 2"? 
in /var/www/html/apache/shared_libs/tcpdf/tcpdf.php on line 17778

2.対策
・変更前 17778行目

        if (!TCPDF_STATIC::empty_string($this->lispacer)) {
                $this->lispacer = '';
                continue ;
        }

・変更後

        if (!TCPDF_STATIC::empty_string($this->lispacer)) {
                $this->lispacer = '';
                continue 2;
        }