Fatal error: Uncaught Error: [] operator not supported for strings in /home/doktorasistan/public_html/application/controllers/question.php:570 Stack trace: #0 /home/doktorasistan/public_html/system/core/CodeIgniter.php(359): Question->question_details() #1 /home/doktorasistan/public_html/index.php(224): require_once('/home/doktorasi...') #2 {main} thrown in /home/doktorasistan/public_html/application/controllers/question.php on line 570