Language: C C++ D Haskell Lua OCaml PHP Perl Plain Text Python Ruby Scheme Tcl <?php // object is always passed by reference in php5 class mclass { private $f; public function g($v) { $this->f = $v; } public function f() { echo $this->f."\n"; } } $obj1 = new mclass(); $obj1->g('5'); $obj1->f(); $obj2 = $obj1; $obj2->f(); ?> Private [?] Run code