How to create rand() char

Turning random integer into character

[twist]

After searching through php.net, webmasterworld and the web looking for a quick easy way to convert a random number into a single character.

I came up with this solution and am curious of any drawbacks or problems that this could cause or if their is a better method available.

echo chr( rand(97, 122) ); // returns a-z
echo chr( rand(65, 90) ); // returns A-Z

[jatar_k]

Seems like a fine answer to me twist.