Code Forums - View Single Post - regex for allowed characters in a form field

DogTags · 03-13-2005, 09:19 AM

Hi All

I'm trying to come up with a regex for validating allowed characters in a form field.

The idea is that if any characters other than those in the approved list are entered in the field, then the form will return an error and message.

I don't know regex from a hole in the ground. So, I'm hoping that someone might have some good ideas about this.

Here is the list of approved characters:

$ALLOWED_CHARS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvw xyz&#!(-)'+/=?:@\""

Yes, the double quote is also allowed and it is escaped near the end.

What would be a good regex to test for these allowed chars?

Many thanks

03-13-2005, 09:19 AM	#1 (permalink)
DogTags Registered User Join Date: Mar 2005 Posts: 8	regex for allowed characters in a form field Hi All I'm trying to come up with a regex for validating allowed characters in a form field. The idea is that if any characters other than those in the approved list are entered in the field, then the form will return an error and message. I don't know regex from a hole in the ground. So, I'm hoping that someone might have some good ideas about this. Here is the list of approved characters: $ALLOWED_CHARS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvw xyz&#!(-)'+/=?:@\"" Yes, the double quote is also allowed and it is escaped near the end. What would be a good regex to test for these allowed chars? Many thanks