除了这组字符，还匹配其他任何内容吗？

Question

I'm looking for a pattern that will match anything but this:

"/[a-z0-9]/i"

How can i do that?

Answer 1

With ^ , which negates a character set.

You want /[^a-z0-9]/i .

[az] matches a..z. [^az] matches anything not a..z.

Answer 2

/[^a-z0-9]/i

The ^ at the start inside a [ ] means "none of these" rather than the conventional "any of these"

If he wants something matches not a-z0-9 one time, this is it. this matches spaces, everything that isn't a-z0-9, one time