accept only string in textbox

[Gamers]

Hi All,

I am creating a form, in this form i want user to enter only string in the text box for that can i create a funtion in php which check the value of the text box Or is there is any other alternative to limit the user to enter only string in the text box.

Thanks in advance

[rstoll]

You could use javascript to restrict the data. If you use jquery than have a look at:
http://docs.jquery.com/Plugins/Validation

However, you should also do a server side validation. You could use preg_match to check if the data conforms:
http://php.net/manual/en/function.preg-match.php

preg_match('#[a-zA-Z]#', $input);