Fatal error: Uncaught Error: Call to undefined function mysql_escape_string() in /var/www/moodle/inf/include/stuff.php:57 Stack trace: #0 /var/www/moodle39/mod/statements/view_by_subject_new.php(165): check_if_subject_exists(Object(mysqli), '36\xC2\xA0') #1 {main} thrown in /var/www/moodle/inf/include/stuff.php on line 57