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# gmp_perfect_square

(PHP 4 >= 4.0.4, PHP 5)

gmp_perfect_square -- Perfect square check

## Description

bool gmp_perfect_square ( resource a)

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

示範 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 printout of the above program will be:
    bool(true)
    bool(false)
    bool(true)

See also: gmp_sqrt(), gmp_sqrtrm().

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