RegEx Pattern to Match Only Certain Characters

The dash needs to be first in order not to be interpreted as a range separator. Also, make sure you anchor your regex with a ^ and $ at the beginning and end respectively so that your entire test string gets swallowed by your regex.

/^[-+., A-Za-z0-9]+$/

I just tested this out, and it seems to work at least from my first round testing.

^[a-zA-Z 0-9\.\,\+\-]*$