alpha or numeric

[knowram]

Is there a php function that will check to see if a variable consists of either a number or letter combination?

thanks for the help

[simcoweb]

Here's what you need:

http://uk2.php.net/manual/en/function.gettype.php

[utexas_pjm]

http://www.php.net/is_numeric

[doni49]

Do you mean see if it's a combination of letters and numbers?  As in validate to see if it' meets your PW and/or username requirements?  If that's what you mean, have a look at www.php.net/ereg and www.php.net/eregi.  Otherwise the is_numeric function to which you were given a link will help.