gmp_sign
(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.
例子 1. gmp_sign() example
<?php
// positive
echo gmp_sign("500") . "\n";
// negative
echo gmp_sign("-500") . "\n";
// zero
echo gmp_sign("0") . "\n";
?>
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The printout of the above program will be:
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