(PHP 4 >= 4.0.4, PHP 5, PHP 7)
gmp_perfect_square — Perfect square check
gmp_perfect_square ( GMP|int|string $num ) : bool
Check if a number is a perfect square.
num
The number being checked as a perfect square.
A GMP object, an int or a numeric string.
Returns true if num is a perfect square, false otherwise.
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"));
?> The above example will output:
bool(true) bool(false) bool(true)
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https://www.php.net/manual/en/function.gmp-perfect-square.php