(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
gmp_neg — Negate number
num
A GMP object, an int,
or a string that can be interpreted as a number following the same logic
as if the string was used in gmp_init() with automatic
base detection (i.e. when base is equal to 0).
Returns -num, as a GMP number.
Example #1 gmp_neg() example
<?php
$neg1 = gmp_neg("1");
echo gmp_strval($neg1) . "\n";
$neg2 = gmp_neg("-1");
echo gmp_strval($neg2) . "\n";
?>The above example will output:
-1 1