Startbbs 'Shaobing BBS' installation error 'Only variable references should be returned by reference'

startBBS is a domestic open source and relatively beautiful MVC-based PHPBBS

When installing, an error "Only variable references should be returned by reference" will be reported

system/core/Common.php line 257

After modifying it like this

it was successful

The above has introduced the error "Only variable references should be returned by reference" during the installation of Startbbs Shaobing BBS installation error Only variable references should be returned by reference "Shaobing BBS", including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.