Calculate square root

gmp_sign
gmp_sqrtrem
GMP Functions
PHP Manual

# gmp_sqrt

(PHP 4 >= 4.0.4, PHP 5)

gmp_sqrt — Calculate square root

### Description

resource gmp_sqrt ( resource `$a` )

Calculates square root of `a`.

### Parameters

`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.

### Return Values

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

### Examples

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";
?>`

The above example will output:

    3
    2
    1234567890

gmp_sign
gmp_sqrtrem
GMP Functions
PHP Manual