(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
gmp_perfect_square — Perfect square check
num
The number being checked as a perfect square.
GMP 对象、int 或 string,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。
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)