SunshinePHP is not limited to just PHP-related talks. There have been sessions covering a wide range of topics supporting PHP developers and DevOps as well, and we encourage speakers to "think outside the box" to come up with unique topics.
Because of financial constraints most conferences tend to pick speakers to present multiple talks. Therefore it is advisable to submit a few talk ideas, not just one. Submitting a single talk will lessen the chances of being selected.
To get the ideas flowing, here's a few suggestions:
NOTE: Talks are 50 minutes + 10 minutes Q&A. Tutorials are 3 hours.