newbie question: str functions

[watts]

This may be a stupid question but is there a way for me to check if a string contains numbers?  I'm trying to do a form validation where I can make sure that certain fields only contain letters or numbers.

Thanks

[ToonMariner]

yep

$str = " some words and some 8734 0387";

if (preg_match('/[0-9]/', $str))
{
echo "its got numbers";
}

[watts]

Thanks,
That did the trick!