I've created a list of popular php-based forum software. If you are looking to start a forum or community, you have a wide choice of software to choose from.

1. Jatra
   Jatra is a fresh PHP-based forum software walks into the party and immediately wows the crowd. It’s still the new kid on the block, but it sure knows how to dance. We built Jatra because none of the other platforms in this list impressed us.

2. Flarum
   Flarum offers a sleek interface and lightning speed. It’s like your cool cousin who shows up in a flashy car and says, “Hop in, we’re going places!”

3. phpBB
   phpBB remains a timeless classic. Picture it as the wise, benevolent elder who always has some sage plugin advice up its sleeve.

4. MyBB
   MyBB provides a simple admin panel and a lively plugin scene. Friends never need to argue about features here, because MyBB basically says, “I got you, buddy.”

5. Simple Machines Forum (SMF)
   SMF is that reliable friend who helps you move all your stuff… twice. It’s easy to install, easy to manage, and easy to love.

6. vBulletin
   vBulletin shows up in a sharp suit and a healthy security system under its arm. It’s popular with large communities that need serious horsepower.

7. XenForo
   XenForo has a modern vibe, plus it’s big on community engagement. It’s like an over-enthusiastic party host that always checks on everyone, saying, “Having fun yet?”

8. Vanilla Forums
   Vanilla might be called “plain,” but it’s anything but. It’s smooth, polished, and can be hosted in the cloud or on your own server.

9. FluxBB
   FluxBB focuses on speed and simplicity. It’s the minimalistic runner who’s light on its feet and never breaks a sweat.

10. PunBB
    PunBB believes in cutting the clutter. This one doesn’t show up with fancy fireworks, but it does the job without hogging your system resources.

11. bbPress
    bbPress fits neatly into a WordPress setup. It’s like the WordPress sibling who says, “I’m here to help, and I already know the whole family.”

12. miniBB
    miniBB goes for small but mighty. It arrives carrying only the essentials, though it’s ready to load up on extensions if you’re feeling fancy.

13. Phorum
    Phorum is one of the older folks in town, yet it’s still pretty flexible. It’s the person you call when you need a big custom job done right.

14. ElkArte
    ElkArte spruces up SMF’s original concept with new features and a modern look. It’s the one who redecorates your living room and makes it Instagram-ready.

15. FUDforum
    FUDforum can merge your forum with mailing lists and newsgroups. It’s like a world-traveling translator that speaks every dialect in the dictionary.

16. IceBB
    IceBB might seem chilly by name, but it keeps things warm with a clean interface and straightforward admin panel.

17. Ultimate PHP Board (UPB)
    UPB covers the basics without going overboard. It’s like that small diner with a short menu but tasty dishes.

18. WoltLab Burning Board
    This premium software arrives in style. It throws a big plugin party and expects you to enjoy every second.

19. Invision Community (formerly Invision Power Board)
    Invision Community covers forums, a CMS, e-commerce—basically the whole shebang. It’s popular with organizations that want a neat package deal.

20. Codoforum
    Codoforum is sleek, modern, and user-friendly. It’s that friend who quietly shows up, organizes your bookshelf by color, and leaves you wondering how you ever lived without it.

21. TangoBB
    TangoBB proves that open-source forums can still dance. It’s relatively lightweight and loves a good spin on the dance floor.