gmp_perfect_square

Perfect square check (PHP 4 >= 4.0.4, PHP 5)
bool gmp_perfect_square ( resource a )

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

例 685. gmp_perfect_square() example

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<?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"));
?>

The printout of the above program will be:

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

See also: gmp_sqrt(), gmp_sqrtrem().