I am using this regex in my code to validate the length of the entered data before allowing the user to submit the page.
The characters can be alphanumeric, but needs to be either 11 or 23 in length. The example above allows anything between 11 and 23. I have been looking for about an hour for an example to do this, but can't seem to get it right.
Can someone help me adjust this so that my users can only enter 11 or 23 characters?