PHP5中文手册·Subtract numbers -- 追寻梦想＞编程乐园＞PHP 编程

resource gmp_sub ( resource $a , resource $b )

Subtracts b from a and returns the result.

a

The number being subtracted from.

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

The number subtracted from 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.

A GMP number resource.

Example#1 gmp_sub() example


<?php
$sub = gmp_sub("281474976710656", "4294967296"); // 2^48 - 2^32
echo gmp_strval($sub) . "\n";
?>

上例将输出：

281470681743360


	PHP5中文手册 gmp_strval gmp_testbit GMP PHP Manual gmp_sub (PHP 4 >= 4.0.4, PHP 5) gmp_sub — Subtract numbers 说明 resource gmp_sub ( resource `$a` , resource `$b` ) Subtracts `b` from `a` and returns the result. 参数 `a` The number being subtracted from. 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` The number subtracted from `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. 返回值 A GMP number resource. 范例 Example#1 gmp_sub() example `<?php $sub = gmp_sub("281474976710656", "4294967296"); // 2^48 - 2^32 echo gmp_strval($sub) . "\n"; ?>` 上例将输出： 281470681743360 gmp_strval gmp_testbit GMP PHP Manual