PHP regex to check a string

Question

I am looking for a PHP regex to check a string is:

A good example is: A123

Thanks!

deceze · Accepted Answer · 2010-09-02 02:39:15Z

up vote 4 down vote accepted

^[A-Z][0-9]{3}$

Explanation:

^         # start of string
[A-Z]     # one character, A-Z
[0-9]{3}  # three characters, 0-9
$         # end of string

answered Sep 2 '10 at 2:39

deceze
232k30259392

\d can be used as a shortcut for [0-9] as well. – Amber Sep 2 '10 at 2:44

@Amber Yup, I was going for something as easy to understand as possible here though. :) – deceze Sep 2 '10 at 2:47

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