SQL injection vulnerablity in accessDB.php

1. https://gitlab.informatika.org/IF3110-2018-K03-Petjah/tugasbesar1_2018/blob/master/web/database/accessDB.php#L48
2. https://gitlab.informatika.org/IF3110-2018-K03-Petjah/tugasbesar1_2018/blob/master/web/database/accessDB.php#L66
3. https://gitlab.informatika.org/IF3110-2018-K03-Petjah/tugasbesar1_2018/blob/master/web/database/accessDB.php#L84
4. https://gitlab.informatika.org/IF3110-2018-K03-Petjah/tugasbesar1_2018/blob/master/web/database/accessDB.php#L102
5. https://gitlab.informatika.org/IF3110-2018-K03-Petjah/tugasbesar1_2018/blob/master/web/database/accessDB.php#L114
6. https://gitlab.informatika.org/IF3110-2018-K03-Petjah/tugasbesar1_2018/blob/master/web/database/accessDB.php#L132
7. https://gitlab.informatika.org/IF3110-2018-K03-Petjah/tugasbesar1_2018/blob/master/web/database/accessDB.php#L160
8. https://gitlab.informatika.org/IF3110-2018-K03-Petjah/tugasbesar1_2018/blob/master/web/database/accessDB.php#L175
9. https://gitlab.informatika.org/IF3110-2018-K03-Petjah/tugasbesar1_2018/blob/master/web/database/accessDB.php#L213