(PHP 4 >= 4.0.4, PHP 5)
gmp_cmp — Compare numbers
Compares two numbers.
It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.
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 a positive value if a > b, zero if a = b and a negative value if a < b.
Example #1 gmp_cmp() example
<?php
$cmp1 = gmp_cmp("1234", "1000"); // greater than
$cmp2 = gmp_cmp("1000", "1234"); // less than
$cmp3 = gmp_cmp("1234", "1234"); // equal to
echo "$cmp1 $cmp2 $cmp3\n";
?>
上例将输出：
1 -1 0