[BB Code] Fast creation a link to a thread or post

[TDCT]

I have an idea of generating a link to a posted thread with its own thread's name.

For example, my thread's id is 10. Then I use a tag named "thread" to create the link. I type:
[topic]10[/topic]

The result is:

<a href="showthread.php?t=10>Thread's name goes here</a>

I wonder how to use php coding in BB Code to get the thread's name. Can anyone help me or develop this idea?

Thanks for your consideration!