Using a class in PHP4 and i don't know how to set a method

Question

in PHP 5 it would be

class Example {   
  private $foo = "old data";
  public function __construct(){}
  public function setVar($data){
      $this->foo = $data;
  }
  public function output(){
    return $this->foo;
  }
}
$var = new Example();
$var->setVar("new data");
echo $var->output();

I never learned OO in PHP 4 and am having trouble finding where to do this. Working with a class that I have to extend a bit. Any searches on this shows me a ton of ways to do this in PHP5 but not 4

Thanks

Answer 1

See PHP Manual on Classes and Objects in PHP4 and Migrating from PHP 4 to PHP 5.0.x

class Example
{
  var $foo = "old data";

  function Example() {}

  function setVar($data){
      $this->foo = $data;
  }

  function output(){
    return $this->foo;
  }
}

$var = new Example();
$var->setVar("new data");
echo $var->output();