gmp_sign

Description

int gmp_sign ( resource a)

Returns 1 if a is positive, -1 if a is negative, and 0 if a is zero.

例子 1. gmp_sign() example


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

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

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

The printout of the above program will be:

1
-1
0