(PHP 4 >= 4.0.4, PHP 5, PHP 7)
Sign of number
int gmp_sign ( GMP $a )
Checks the sign of a number.
Parameters:
a
Either a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string provided that it is possible to convert the latter to a number.
Returns:
Returns 1 if a is positive, -1 if a is negative, and 0 if a is zero.
Examples:
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
See also:
abs() -
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