[Conny Westh]

Nu har jag fått till det som jag vill ha det, ett tydligt felmeddelande när man använder odefinierade egenskaper på en klass (det borde vara inbyggt i ett objektorienterat språk):

<?php
class Person
{
    private $firstname;
    private $lastname;

	public function __construct($pFirstname, $pLastname)
	{
		$this->firstname = $pFirstname;
		$this->lastname = $pLastname;
	}

    public function __set($name, $value)
    {
        switch ($name)
        {
            case 'firstname':
                $this->firstname = $value;
                break;

            case 'lastname':
                $this->lastname = $value;
                break;

            default:
            		# By throwing Exception for undefined property we can enforce strict property definition rules
            		# we also achive better error messages for improved debugging during development
            		# this is necessary because of lack of support for strict properties in php 5.3.15
            		$error = "Error: __set property: " . $name . " not supported by class: " . __CLASS__ ;
					throw new Exception($error);
					break;
        }
    }

    public function __get($name)
    {
        switch ($name)
        {
            case 'firstname':
                return $this->firstname;
                break;

            case 'lastname':
                return $this->lastname;
                break;

            default:
            		# By throwing Exception for undefined property we can enforce strict property definition rules
            		# we also achive better error messages for improved debugging during development
            		# this is necessary because of lack of support for strict properties in php 5.3.15
            		$error = "Error: __get property: " . $name . " not supported by class: " . __CLASS__ . ".";
					throw new Exception($error);
					break;
        }
        return null;
    }

	/*
	* a String representation for all Persons.
	*/
	public function __toString()
	{
		return $this->firstname . " " . $this->lastname;
	}
}


?>

<?php

	$rad = 0;
	try
	{
		echo "\nTest of errormessage wehen faulty property ...\n";
		echo "(row) - Firstname Lastname\n";
		# create a PHP Array and initialize it with Person objects
		$persons = array
		(
			new Person("Fredrik", "Framberg"),
			new Person("Greta", "Gavelstam"),
			new Person("Urban", "Urberg"),
			new Person("Anna", "Ambtesteg"),
			new Person("Henrik", "Hammarberg"),
			new Person("Kristina", "Karlestam"),
			new Person("Hans", "Hallin"),
			new Person("Berit", "Bygdén")
		);

		# print out the results - calls Person->__toString().
		foreach($persons as $person) echo "(" . ++$rad . ") - " . "$person\n";
	}
	catch (Exception $e)
	{
		echo 'Caught exception (1): ',  $e->getMessage(), "\n";
	}

	try
	{
		echo "\nTest of creating new object of class Person ...\n";
		$faultyPerson = new Person("Dennis","Harper");
		echo "This message will hopefully be written to console.\n";
	}
	catch (Exception $e)
	{
		echo 'Caught exception (2): ',  $e->getMessage(), "\n";
	}

	try
	{
		echo "\nTest of errormessage when faulty __set property ...\n";
		echo "(" . ++$rad . ") - " . "$faultyPerson\n";
		$faultyPerson->Age = 34;
		$faultyPerson->ShoeSize = 45;
		echo "Age: " . $faultyPerson->Age . " years.\n";
		echo "ShoeSize: " . $faultyPerson->ShoeSize . ".\n";

		echo "This message will not be written to console.\n";

	}
	catch (Exception $e)
	{
		echo 'Caught exception (3): ',  $e->getMessage(), "\n";
	}

	try
	{
		echo "\nTest of errormessage when faulty __get property ...\n";
		echo "(" . ++$rad . ") - " . "$faultyPerson\n";
		echo "ShoeSize: " . $faultyPerson->ShoeSize . ".\n";
		echo "Age: " . $faultyPerson->Age . " years.\n";

		echo "This message will not be written to console.\n";

	}
	catch (Exception $e)
	{
		echo 'Caught exception (4): ',  $e->getMessage(), "\n";
	}

	echo "\nDone testing class: Person.\n---------------------------------------\n\n";
?>