regexp search?

[CrashRoX]

I have a string which contain several expressions that look like "[[ whatever ]]". I was hoping for some kind of regualr expression search to locate and return them. The regular expression syntax is not the problem, what would be the best function to go about this search and return?

[laserlight]

Since you intend to use regex, it would be [man]preg_match/man or [man]preg_match_all/man

[CrashRoX]

thanks