Question

I’m trying to make sure a string I’m posting only has alphabetical and numberical letters/numbers + ,.; etc. However all checks I seem to do still bring back à è ò as valid?

Anyone know a solution for this?

Thanks

Answer 1

If you know exactly what characters you want to allow, a regex should be fitting your needs:

// matches exactly the characters you asked for, no more
preg_match(/[a-zA-Z0-9,\.;]*/, $your_string); 

Be sure to escape meta characters, because for example a non-escaped dot (.) will match every character.