Fatal error: Uncaught Error: Call to undefined function mysql_real_escape_string() in /data/www/ckgsb/application/controllers/library/index.php:71 Stack trace: #0 /data/www/ckgsb/system/core/CodeIgniter.php(360): Index->professor() #1 /data/www/ckgsb/index.php(84): require_once('/data/www/ckgsb...') #2 {main} thrown in /data/www/ckgsb/application/controllers/library/index.php on line 71