SHOW WRONG WHEN I INSTALL THE PHPVMS

HELLO GUYS,IT SHOW WRONG WHEN I INSTALL THE PHPVMS .

IT SHOWS “Parse error: syntax error, unexpected ‘?’ in /www/wwwroot/vms.hkver.cn/vendor/laravel/framework/src/Illuminate/Foundation/helpers.php on line 233

I JUST UPSAVE ALL THE FILESTO MY SERVER HOST ,MY SERVER IS APACHE2.4   php5.6   HOW CAN I DEAL THE PROBLEM?

 

 

are you on a free hosting ? as phpvms is not working well with free hosting 

NO I SETUP IT ON BANDWAGONHOST AND MY ENVIRONMENT IS MYSQL5.5+PHP5.6+APACHE2.4 . SHOULD I CHANGE IT TO NGINX?