Fixes #25 - use insertIfNotExist()

[DeepDiver1975]

Description

Fixes #25

ToDo

• [x] add phpunit to Makefile
• [x] run make test-php in drone with mysql
• [x] run make test-php in drone with postsql
• [ ] run make test-php in drone with oracle
• [x] run make test-php in drone with sqlite

Checklist:

• [ ] Latest changes are published according to instructions in README.md

[DeepDiver1975]

Setting the big id is not working in Oracle because fileid is generated from a sequence. We could adopt the sequence maybe?