Sign of number
$a
Checks the sign of a number.
a
It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.
Returns 1 if a is positive, -1 if a is negative, and 0 if a is zero.
Example #1 gmp_sign example
<?php// positiveecho gmp_sign("500") . "\n";// negativeecho gmp_sign("-500") . "\n";// zeroecho gmp_sign("0") . "\n";?>
The above example will output:
1 -1 0