Data validation.

[ramu_rp2005]

Hi all,
I've an hexadecimal value who's validation has to be made. I should except only hexadecimal value and should not entertain any other letters or alphabets such as .,;:'" . Can anyone help provide me a code for this.

[Weedpacket]

[man]ctype_xdigit[/man]

[ramu_rp2005]

thanks.