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gmp_perfect_square

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

gmp_perfect_squarePerfect square check

说明

gmp_perfect_square(GMP|int|string $num): bool

Check if a number is a perfect square.

参数

num

The number being checked as a perfect square.

GMP 对象、intstring,可以按照跟在 gmp_init() 中使用字符串并自动检测 base(即当 base 等于 0 时)相同的逻辑将其解释为数字。

返回值

Returns true if num is a perfect square, false otherwise.

示例

示例 #1 gmp_perfect_square() example

<?php
// 3 * 3, perfect square
var_dump(gmp_perfect_square("9"));

// not a perfect square
var_dump(gmp_perfect_square("7"));

// 1234567890 * 1234567890, perfect square
var_dump(gmp_perfect_square("1524157875019052100"));
?>

以上示例会输出:

bool(true)
bool(false)
bool(true)

参见

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