A PHP Error was encountered
Severity: Notice
Message: Undefined index: userid
Filename: views/question.php
Line Number: 191
Backtrace:
File: /var/www/html/cnasolution/application/views/question.php
Line: 191
Function: _error_handler
File: /var/www/html/cnasolution/application/controllers/Questions.php
Line: 419
Function: view
File: /var/www/html/cnasolution/index.php
Line: 315
Function: require_once
How to Get An URL of is_single in is_page [duplicate]
How do I check if a URL exists (not 404) in PHP?