Validate int

[d-machine]

Hi,

I have a simple form with a text field

and I want to check if it was written there a integer.

I used is_numeric($_POST["input"]) but it accepts also double number.

What can I do?

[prasanthmj]

use regular expression matching.

if(!preg_match("/^[\-\+]?[\d]*$/",$_POST["input"]))
{
//error
} 

The following pages might be helpful:
PHP Form Validation Script
and
JavaScript Form Validation