__toString example implementation

Person.php

<?php

class Person
{
  protected $name = NULL, $surname = NULL;
  public function __construct($name, $surname)
  {
    $this->name = $name;
    $this->surname = $surname;
  }
  public function getName()
  {
    return $this->name;
  }

  public function getSurname()
  {
    return $this->surname;
  }

  public function __toString()
  {
    return sprintf("%s, %s", $this->surname, $this->name);
  }
}