Question

Quick regex question (since i am horrible at it)

I have a field that can only have either:

XXXXXXXXXX or XXXXXX-XXXX where X is a real number.

Bonus if the regex works well with PHP’s regex functions.

The Answer:

Here’s the code from RoBorg’s answer, for those interested.

if(!preg_match('/^\d{6}-?\d{4}$/', $var)) {     // The entry didn't match } 

Answer 1

/^\d{6}-?\d{4}$/ 

That’s

^     Start of string \d{6} a digit, repeated exactly 6 times -?    an optional '-' \d{4} a digit, repeated exactly 4 times $     end of string