Fatal error: Uncaught Error: Undefined constant "Patchwork\Utf8\MB_OVERLOAD_STRING" in /customers/e/e/4/kingtaro.com/httpd.www/laravel4/vendor/patchwork/utf8/class/Patchwork/Utf8/Bootup.php:47
Stack trace:
#0 /customers/e/e/4/kingtaro.com/httpd.www/laravel4/bootstrap/autoload.php(46): Patchwork\Utf8\Bootup::initMbstring()
#1 /customers/e/e/4/kingtaro.com/httpd.www/index.php(21): require('/customers/e/e/...')
#2 {main}
  thrown in /customers/e/e/4/kingtaro.com/httpd.www/laravel4/vendor/patchwork/utf8/class/Patchwork/Utf8/Bootup.php on line 47