gmp_perfect_square
(PHP 4 >= 4.0.4, PHP 5)
gmp_perfect_square — Perfect square check
參數
-
a -
The number being checked as a perfect square.
可以是一個 GMP 數據 resouce，或一個可以轉換為數值的字串。
回傳值
Returns TRUE if a is a perfect square,
FALSE otherwise.
範例
Example #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"));
?>
上例將輸出：
bool(true) bool(false) bool(true)
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