useful recursive PHP functions

recursively ...

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• ... delete directory remove directory recursively with PHP
• ... get size get filesize of directory and all files within
• ... do whatever PHP can do recursively handle data with PHP

PHP Manual for

gmp_perfect_square

(PHP 4 >= 4.0.4)

gmp_perfect_square -- Perfect square check

Description

bool gmp_perfect_square ( resource a)

Returns TRUE if a 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 printout of the above program will be:

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

See also: gmp_sqrt(), gmp_sqrtrm().

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