Fatal error: Uncaught Error: Call to undefined function mysql_query() in /var/www/html/stg_Appraisal/include/function.php:12 Stack trace: #0 /var/www/html/stg_Appraisal/include/mail_id_all_role.php(4): sel_single_record() #1 /var/www/html/stg_Appraisal/include/db_connection.php(14): include('/var/www/html/s...') #2 /var/www/html/stg_Appraisal/index.php(3): include('/var/www/html/s...') #3 {main} thrown in /var/www/html/stg_Appraisal/include/function.php on line 12