[Resolved] determine positive integer from html form input

[chucklarge]

Hi,
I am trying to determine if a positive integer has been inputed in an html field. I have this line but no inputed value passes the conditional.

if(  (is_int($_POST['input_number_sets'])) && ($_POST['input_number_sets'] > 0) )

I think html form values are inputed as strings, correct?

I later have to do some mathmatical calculations on the value so does that mean i need to convert the value to an integer?

Thanks,
chuck

[jannoy]

why not use javascript first on your html form so it will detect automatically if its an integer or not ??

so in your php it will not be a problem detecting if its a integer or not?

[chucklarge]

Hi,
While I am not opposed to using javascript on my site, i rather use it to enhance the functionality. I don't want rely on it at all for stuff to function correctly. I just think about the person that has javascript disabled and enters a negative number.

Thanks,
chuck

[jannoy]

okayy

try this

<?

$num=1;
echo is_numeric($num);
if (is_numeric($num)==1)) { echo "it is numeric" ; } else { echo "not numeric ";}

?>

this will return true or 1

[chucklarge]

Hi,
You're right, [MAN]is_numeric[/MAN] must be used on strings(form inputs). However, i decided to use [MAN]ctype_digit[/MAN] instead because it will reject '-' and '.' , which is what i wanted for an integer. so my condition statement for an integer >0 is

if( ctype_digit($_POST['input_number_sets']) && ($_POST['input_number_sets'] > 0) )

Thanks for your help,
Chuck

[Weedpacket]

Originally posted by chucklarge
While I am not opposed to using javascript on my site, i rather use it to enhance the functionality. I don't want rely on it at all for stuff to function correctly.

So do both; client side for convenience (theirs and your server's) and server-side (for verification).