// no break
                case 'ASCII':
                case 'UTF8':
                case 'UTF-8':
            }
        }
 
        self::$encodingList = $encodingList;
 
        return true;
    }
 
    public static function mb_strlen($s, $encoding = null)
    {
        $encoding = self::getEncoding($encoding);
        if ('CP850' === $encoding || 'ASCII' === $encoding) {
            return \strlen($s);
        }
 
        return @iconv_strlen($s, $encoding);
    }
 
    public static function mb_strpos($haystack, $needle, $offset = 0, $encoding = null)
    {
        $encoding = self::getEncoding($encoding);
        if ('CP850' === $encoding || 'ASCII' === $encoding) {
            return strpos($haystack, $needle, $offset);
        }
 
        $needle = (string) $needle;
        if ('' === $needle) {
            trigger_error(__METHOD__.': Empty delimiter', E_USER_WARNING);
 
            return false;
        }
 
        return iconv_strpos($haystack, $needle, $offset, $encoding);
    }
 
    public static function mb_strrpos($haystack, $needle, $offset = 0, $encoding = null)

Fatal error: Uncaught Error: Call to undefined function Symfony\Polyfill\Mbstring\iconv_strlen() in /home/upcac/public_html/fasi/application/vendor/symfony/polyfill-mbstring/Mbstring.php:483 Stack trace: #0 /home/upcac/public_html/fasi/application/vendor/symfony/polyfill-mbstring/bootstrap.php(33): Symfony\Polyfill\Mbstring\Mbstring::mb_strlen('Uncaught Error:...', 'UTF-8') #1 /home/upcac/public_html/fasi/application/vendor/symfony/var-dumper/Dumper/CliDumper.php(181): mb_strlen('Uncaught Error:...', 'UTF-8') #2 /home/upcac/public_html/fasi/application/vendor/symfony/var-dumper/Cloner/Data.php(365): Symfony\Component\VarDumper\Dumper\CliDumper->dumpString(Object(Symfony\Component\VarDumper\Cloner\Cursor), 'Uncaught Error:...', false, 0) #3 /home/upcac/public_html/fasi/application/vendor/symfony/var-dumper/Cloner/Data.php(265): Symfony\Component\VarDumper\Cloner\Data->dumpItem(Object(Symfony\Component\VarDumper\Dumper\HtmlDumper), Object(Symfony\Component\VarDumper\Cloner\Cursor), Array, 'Uncaught Error:...') #4 /home/upcac/public_html/fasi/application/vendor/symfony/var-dumper/Dumper/AbstractDumper.php(140): Symfony\Component\VarDumper\Cloner\Data->dump(Object(Symfony\Component\VarDumper\Dumper\HtmlDumper)) #5 /home/upcac/public_html/fasi/application/vendor/symfony/var-dumper/Dumper/HtmlDumper.php(145): Symfony\Component\VarDumper\Dumper\AbstractDumper->dump(Object(Symfony\Component\VarDumper\Cloner\Data), Object(Whoops\Util\HtmlDumperOutput)) #6 /home/upcac/public_html/fasi/application/vendor/filp/whoops/src/Whoops/Util/TemplateHelper.php(177): Symfony\Component\VarDumper\Dumper\HtmlDumper->dump(Object(Symfony\Component\VarDumper\Cloner\Data), Object(Whoops\Util\HtmlDumperOutput)) #7 /home/upcac/public_html/fasi/application/vendor/filp/whoops/src/Whoops/Util/TemplateHelper.php(208): Whoops\Util\TemplateHelper->dump('Uncaught Error:...') #8 /home/upcac/public_html/fasi/application/vendor/filp/whoops/src/Whoops/Resources/views/frame_code.html.php(37): Whoops\Util\TemplateHelper->dumpArgs(Object(Whoops\Exception\Frame)) #9 /home/upcac/public_html/fasi/application/vendor/filp/whoops/src/Whoops/Util/TemplateHelper.php(250): require('/home/upcac/pub...') #10 [internal function]: Whoops\Util\TemplateHelper->Whoops\Util\{closure}('/home/upcac/pub...', Array) #11 /home/upcac/public_html/fasi/application/vendor/filp/whoops/src/Whoops/Util/TemplateHelper.php(248): call_user_func(Object(Closure), '/home/upcac/pub...', Array) #12 /home/upcac/public_html/fasi/application/vendor/filp/whoops/src/Whoops/Resources/views/panel_details.html.php(1): Whoops\Util\TemplateHelper->render('/home/upcac/pub...') #13 /home/upcac/public_html/fasi/application/vendor/filp/whoops/src/Whoops/Util/TemplateHelper.php(250): require('/home/upcac/pub...') #14 [internal function]: Whoops\Util\TemplateHelper->Whoops\Util\{closure}('/home/upcac/pub...', Array) #15 /home/upcac/public_html/fasi/application/vendor/filp/whoops/src/Whoops/Util/TemplateHelper.php(248): call_user_func(Object(Closure), '/home/upcac/pub...', Array) #16 /home/upcac/public_html/fasi/application/vendor/filp/whoops/src/Whoops/Resources/views/panel_details_outer.html.php(2): Whoops\Util\TemplateHelper->render('/home/upcac/pub...') #17 /home/upcac/public_html/fasi/application/vendor/filp/whoops/src/Whoops/Util/TemplateHelper.php(250): require('/home/upcac/pub...') #18 [internal function]: Whoops\Util\TemplateHelper->Whoops\Util\{closure}('/home/upcac/pub...', Array) #19 /home/upcac/public_html/fasi/application/vendor/filp/whoops/src/Whoops/Util/TemplateHelper.php(248): call_user_func(Object(Closure), '/home/upcac/pub...', Array) #20 /home/upcac/public_html/fasi/application/vendor/filp/whoops/src/Whoops/Resources/views/layout.html.php(23): Whoops\Util\TemplateHelper->render('/home/upcac/pub...') #21 /home/upcac/public_html/fasi/application/vendor/filp/whoops/src/Whoops/Util/TemplateHelper.php(250): require('/home/upcac/pub...') #22 [internal function]: Whoops\Util\TemplateHelper->Whoops\Util\{closure}('/home/upcac/pub...', Array) #23 /home/upcac/public_html/fasi/application/vendor/filp/whoops/src/Whoops/Util/TemplateHelper.php(248): call_user_func(Object(Closure), '/home/upcac/pub...', Array) #24 /home/upcac/public_html/fasi/application/vendor/filp/whoops/src/Whoops/Handler/PrettyPageHandler.php(252): Whoops\Util\TemplateHelper->render('/home/upcac/pub...') #25 /home/upcac/public_html/fasi/application/vendor/filp/whoops/src/Whoops/Run.php(272): Whoops\Handler\PrettyPageHandler->handle(Object(Whoops\Exception\ErrorException)) #26 /home/upcac/public_html/fasi/application/vendor/filp/whoops/src/Whoops/Run.php(353): Whoops\Run->handleException(Object(Whoops\Exception\ErrorException)) #27 /home/upcac/public_html/fasi/application/vendor/filp/whoops/src/Whoops/Run.php(382): Whoops\Run->handleError(1, 'Uncaught Error:...', '/home/upcac/pub...', 483) #28 [internal function]: Whoops\Run->handleShutdown() #29 {main} thrown in /home/upcac/public_html/fasi/application/vendor/symfony/polyfill-mbstring/Mbstring.php on line 483