PHP5中文手册·Perfect square check -- 追寻梦想＞编程乐园＞PHP 编程

说明

bool gmp_perfect_square ( resource $a )

Check if a number is a perfect square.

参数

a

The number being checked as a perfect square.

It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.

返回值

Returns TRUE if a is a perfect square, FALSE otherwise.

范例

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"));
?>

上例将输出：

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


	PHP5中文手册 gmp_or gmp_popcount GMP PHP Manual gmp_perfect_square (PHP 4 >= 4.0.4, PHP 5) gmp_perfect_square — Perfect square check 说明 bool gmp_perfect_square ( resource `$a` ) Check if a number is a perfect square. 参数 `a` The number being checked as a perfect square. It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number. 返回值 Returns `TRUE` if `a` is a perfect square, `FALSE` otherwise. 范例 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")); ?>` 上例将输出： bool(true) bool(false) bool(true) 参见 gmp_sqrt() gmp_sqrtrem() gmp_or gmp_popcount GMP PHP Manual

gmp_perfect_square

说明

参数

返回值

范例

参见