field input check for only digits

[sciwaysoft]

Question : 1
How can I check if the variable $myvarnum is a 3 digit number.

Question : 2
If the variable is valid then open a page (validnum.php) in the same window.

Thanks in advance...

[sidney]

http://uk.php.net/manual/en/function.is-numeric.php
http://uk.php.net/manual/en/function.strlen.php
if(is_numeric($myvarnum) and strlen($myvarnum) =3)
{
//do what ever
}

http://uk.php.net/manual/en/function.header.php
header("location: folder/page.ext?var=somthing");

[sciwaysoft]

thanks

I am using the posted variable is this code will work

$myvarnum= $_POST['inputnumber']
if(is_numeric($myvarnum) and strlen($myvarnum) =3) 

with header i can open the page in the same window... can i open a separate window.

and if can i open a java script popup window with that..?

[sidney]

that code looks fine

never tried javascript pop up from header give it a go and let us know result