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phpsubtraction

function to get the subtraction result state that is it positive or negative?

I am performing subtraction on two variable. 

$first_variable = 20;
$second_variable = 30;
$result = $first_variable - $second_variable;

So how do i get that the result $result is positive or negative? Have any PHP function to determine that the result of subtraction is positive or negative? I know the i can use if statement to get it done. but i am asking for any predefined function to do it.

The reason i asked it hear is just a curiosity.

Solution

  • You can use php gmp_sign function to achieve that check this

    Example:-

    <?php
// positive
echo gmp_sign("500") . "\n";

// negative
echo gmp_sign("-500") . "\n";

// zero
echo gmp_sign("0") . "\n";
?>

    output

    1
-1
0