<?php
class foo {
 public $arg1, $arg2;
 private $y;
 $this->arg = 18;
 private function bar($x) {
  $this->y=$x+$arg1-$arg2;
  return $this->y;
 }
}


$rb = new foo;
$rb->arg2=14;
return $rb->bar(85.4);
?>