Why preg_match(“/[^(22|75)]/”, “25”) returns false?

Question

I want to test that a given string does not belong to the following group of strings: 22 75.

Could anyone please tell why PHP\'s preg_match(\"/[^(22|75)]/\

Answer 1

In regular expression, [...] match any character inside the bracket.

To be more correct:

• [^...]: match any charcter not listed inside the bracket. (^: negate)

Remove the [, and ] if you want to match string that starts with 22 or 76.