Question

I am using jquery to check for invalid characters. I know this is unsafe but I am also using a PHP check and the jquery is just for instant feedback. What is the string I would use to verify the input. Is it something like [az-AZ-09]? Also how do I check the value against that string? Thanks!

Answer 1

Why not just use a simple regex?

var name = ...;
if (name.match(/[a-z0-9]+/i)) {
  ...
}