gmp_sqrt

(PHP 4 >= 4.0.4, PHP 5)

gmp_sqrt — Calculate square root

说明

resource gmp_sqrt ( resource $a )

Calculates square root of a .

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.

返回值

The integer portion of the square root, as a GMP number.

范例

Example#1 gmp_sqrt() example


<?php
$sqrt1 = gmp_sqrt("9");
$sqrt2 = gmp_sqrt("7");
$sqrt3 = gmp_sqrt("1524157875019052100");

echo gmp_strval($sqrt1) . "\n";
echo gmp_strval($sqrt2) . "\n";
echo gmp_strval($sqrt3) . "\n";
?>

上例将输出：

3
2
1234567890