how to include exeption in ereg_replace?

[stephdumais]

Hi, I'd like to use the following function:

$out = ereg_replace("[^[:alnum:]]", "", $in);

But I would like to include an exeption in the function, in my case, the underscore character. In other words, I want to strip the input of any non alpha-numeric characters except for "_".
Can this be done?

Thanks

[laserlight]

Would this work:

$out = ereg_replace("[^{[:alnum:]_]",} "", $in);

[stephdumais]

Why yes it does, thanks 🙂