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(PHP 4 >= 4.0.4, PHP 5, PHP 7)
gmp_sqrtrem — Square root with remainder
$a
)Calculate the square root of a number, with remainder.
a
The number being square rooted.
可以是一个 GMP 数据 resouce ,或一个可以转换为数值的字符串。
Returns array where first element is the integer square root of
a
and the second is the remainder
(i.e., the difference between a
and the
first element squared).
Example #1 gmp_sqrtrem() example
<?php
list( $sqrt1 , $sqrt1rem ) = gmp_sqrtrem ( "9" );
list( $sqrt2 , $sqrt2rem ) = gmp_sqrtrem ( "7" );
list( $sqrt3 , $sqrt3rem ) = gmp_sqrtrem ( "1048576" );
echo gmp_strval ( $sqrt1 ) . ", " . gmp_strval ( $sqrt1rem ) . "\n" ;
echo gmp_strval ( $sqrt2 ) . ", " . gmp_strval ( $sqrt2rem ) . "\n" ;
echo gmp_strval ( $sqrt3 ) . ", " . gmp_strval ( $sqrt3rem ) . "\n" ;
?>
以上例程会输出:
3, 0 2, 3 1024, 0