function age($a) { $this->age = (string) $a; } function feelings($f) { $this->feelings = $f; } //$this refers to the currently occupied class function welcome() { echo 'hello ' . $this->name . ' you are ' . $this->age . ' years old and you are feeling ' . $this->feelings . '<br>'; } function introduce($person) { echo 'hello ' . $person->name . ', I am ' . $this->name . '<br>'; } } $person = new person(); $person->name('steve'); $person->age(28); $person->feelings('let down'); // $person->welcome(); //sets the same class above to person and person2 both using their own isolated scope (they use the same set of functions) $person2 = new person(); $person2->name('Chris'); $person2->age('103'); $person2->feelings('overwhelmed'); // $person2->welcome(); $person2->introduce($person);