Question

I have this code and the issue is it’s giving output from $2,147,483,647 where as I have set 3000000000 that is $3,000,000,000

And I want out from what we set there in form but if we choose higher $2,147,483,647 it start from $2,147,483,647

Here are my codes.

$v = isset($_GET['v']) ? (int) $_GET['v'] : 3000000000;

First time it gives correct. But when we change the value in the form it gives the wrong output.

Answer 1

You’re encountering a case of integer overflow, as the maximum value of PHP’s integer is 2^31-1 which evaluates to 2147483647. PHP handles integer overflow by just limiting values to the edge of the bounds they go beyond.

To solve this, you can use a float, which has a much larger range of values. There are several ways to declare a number as a float, such as using E notation or via casting, both as shown below.

$v         = isset($_GET['v']) ? (float) $_GET['v'] : 3E9;