Destructor til objekter

Findes der en standard destroy funktion til objecter i PHP3?

Hvis ikke, hvordan laves den så?

Her er min klasse:

class TPerson {
  var $firstname;
  var $lastname;
  var $adr;
  var $zip;
  var $city;
  var $phone;
  var $email;

/*
**    CONSTRUCTOR
*/
  function TPerson($firstname, $lastname, adr, $zip, $city, $pho, $email) {
    $this -> firstname = $firstname;
    $this -> lastname = $lastname;
    $this -> adr = $adr;
    $this -> zip = $zip;
    $this -> city = $city;
    $this -> phone = $pho;
    $this -> email = $email;
  }
}    //Class person