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(PHP 4 >= 4.0.4, PHP 5)

gmp_sign -- Sign of number

Description

int gmp_sign ( resource a )

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

Example 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