gmp_perfect_square
(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
gmp_perfect_square — Perfect 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 对象或 int ，或数字string。
返回值
Returns true if num is a perfect square,
false otherwise.
范例
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"));
?>
以上例程会输出：
bool(true) bool(false) bool(true)
参见
gmp_perfect_power() - Perfect power check gmp_sqrt() - Calculate square root gmp_sqrtrem() - Square root with remainder
User Contributed Notes
There are no user contributed notes for this page.官方地址：https://www.php.net/manual/en/function.gmp-perfect-square.php