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

Your regex is asking "does the string contain a character that is not (, 2, 7, 5, | or )?"

This is obviously not what you want.

Try this:

if( !in_array("25", array("22","75")))