Просмотр поста

[~] >>> cat t.php 
<?php

function foo($value, $times)
{
    for ($i = 0; $i < $times; $i++) {
        $value *= 2;
    }

    return $value;
}

var_dump(foo(1, 2), foo(2, 2), foo(3, 2));
[~] >>> php t.php 
int(4)
int(8)
int(12)
[~] >>>