reg exp prob with brackets

[khjart]

I'm trying to validate a variable passed through a form by the user. Using reg exp I want to check if the variable contains any other characters than a-z 0-9 _ . - ( ) [ ] . However, it doesn't seem to work with the ] and [. If I remove them from the reg exp it works. Here's what I have so far:

eregi("[^{[]a-z0-9_.()-]",} $var)

What is wrong here?

[laserlight]

Could try:
preg_match('/[^{a-z0-9_.-()[]]/',} $var)

Or if the brackets are still giving problems, then:
preg_match('/[^{a-z0-9_.-()\x5B\x5D]/',} $var)

incidentally, you might want to use:
/[^{a-z0-9_.-()\x5B\x5D]/i}
for case-insensitive matching

[khjart]

Allright, that works perfectly! Thanks.