Connection failed: SQLSTATE[HY000] [2002] Connection refused Notice: Undefined variable: conn in /var/www/html/nurse2/research_user_publication.php on line 54
Fatal error: Uncaught Error: Call to a member function prepare() on null in /var/www/html/nurse2/research_user_publication.php:54
Stack trace:
#0 {main}
thrown in /var/www/html/nurse2/research_user_publication.php on line 54