Sign of number
$num
Checks the sign of a number.
num
Either a GMP object, or a numeric string provided that it is possible to convert the latter to an int.
Returns 1 if num is positive, -1 if num is negative, and 0 if num 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 above example will output:
1 -1 0