a thread problem

[pnxi]

Hi, I'm writing a php forum, which is very basic and simple, I just use text file to store thread, and I have no idea how to create reply function, say I can display a thread on the page, and how to implement a function let the title be clickable so that it can display the content?
please help!🙁

[marque]

Most forums use a recursive database table, with an auto-incremented tread id and a parent id.

each top level thread would have a parent id of 0 but the "replies" would have the parent id of the thread stater.

eg:

| Thread_ID | Parent_ID | Title | Body |

| 1 | 0 | Help Me | .... |
| 2 | 1 | RE: Help Me | ........ |

the trick is to write or find a class or function to step through the database and extract the information.

hope this helps