gmp_cmp

(PHP 4 >= 4.0.4, PHP 5)

gmp_cmp — Compare numbers

说明

int gmp_cmp ( resource $a , resource $b )

Compares two numbers.

参数

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.
b: It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.

返回值

Returns a positive value if a > b, zero if a = b and a negative value if a < b.

范例

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