Numbers

[Anon]

Hi,

I need to check that a variable only contains numbers and has a certain length.

For instance:
$a = 0123;

If I use:
$a = (integer)$a // equals $a=123

The (integer) casting "works", becaus it remove e.g. letters...

$a = 123a;
$a = (integer)a$ // equals $a=123 - which is OK

Is there a way to solve the problem, so that leading zero's won't be removed?

Hope someone has the answer,
Kenneth

[delphis]

Hate to have to give you the RTFM answer.. but in this case it's true. Check the PHP manual in section 'LXIII. Variable Functions'. There are functions to determine a variable's type.

You might want to check out 'intval' too for getting the integer value (obviously) of the variable, so you can see it's 123 (one hundred and twenty three) and is still the string '0123'.

[Anon]

Thanks, it turned out just fine if I use the is_numeric() and strlen() functions...

Bye the way: The section is LXXIII - with two X's 🙂

Kenneth

[delphis]

Kenneth Kryger Sorensen wrote:

Thanks, it turned out just fine if I use the is_numeric() and strlen() functions...

Bye the way: The section is LXXIII - with two X's 🙂

Kenneth

Well, no .. on the manual I downloaded only a little while ago it's exactly how I put in my comment as I cut and pasted 'LXIII. Variable Functions' .. maybe it's changed.

And as you're being pedantic, it's 'by the way'.