<?php class calculator { public function sum($x, $y) { return $x + $y; } public function mul($x, $y) { return $x * $y; } public function fak($n) { if ($n == 0) { return 1; } return $this->fak($n - 1) * $n; } } //-------------------------------------------- //-------------------------------------------- //-------------------------------------------- $calc = new calculator(); for ($i = 0; $i < 10; $i++) { echo "{$i} + {$i} = " . $calc->sum($i, $i) . "<br>"; echo "{$i} * {$i} = " . $calc->mul($i, $i) . "<br>"; echo "{$i}! = " . $calc->fak($i) . "<br>"; echo "<hr>"; }