simple PHP OOP example

<?php


class User{

	function setUsername($username){
		$this->internalUsername=$username;
	}


	function getUsername(){
		if(!isset($this->internalUsername)){
			$this->internalUsername='Not defined yet';
		}
		return $this->internalUsername;
	}

}

// in real life code above will be in separate file



$u=new User();

echo "username: ".$u->getUsername();

$u->setUsername('Rich');

echo "<br />username: ".$u->getUsername();

?>