Warning: Undefined variable $dbh in /var/www/html/include/PaperClass.php on line 110

Fatal error: Uncaught Error: Call to a member function prepare() on null in /var/www/html/include/PaperClass.php:110 Stack trace: #0 /var/www/html/include/PaperClass.php(246): findEds('CAT90933138', Object(PDO)) #1 /var/www/html/sbt/search/search_results.php(142): paper_search('CAT90933138') #2 {main} thrown in /var/www/html/include/PaperClass.php on line 110