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This document uses PHP Chinese website manual Release
(PHP 4 >= 4.0.4, PHP 5, PHP 7)
gmp_sqrt — Calculate square root
$a
)
Calculates square root of a
.
a
可以是一个 GMP 数据 resouce ,或一个可以转换为数值的字符串。
The integer portion of the square root, as a GMP number.
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" ;
?>
以上例程会输出:
3 2 1234567890