Object Oriented Get Set using constructor

[snipered]

Hi, new to this forum and very new to php (2 weeks).

 

I'm trying to teach myself php by following a book.  I have a constructor, that's supposed to call the get method but it doesn't seem to be. I know because i did and echo out and i got nothing displayed.

 

I get the problem on my set method because for some reason _changedproperties is being passed to it and not the correct values.

 

Does someone know why please?

 

class Users {

	private $_properties;
	private $_hdb;

	public function __construct($userID) {
		$this->_properties = array();
		$this->_changedProperties = array();
		$this->_properties['id'] = null;
		$this->_properties['surname'] = null;
		$this->_properties['forename'] = null;


		$this->_hdb = mysql_connect('localhost','username','password');
		if(! is_resource($this->_hdb)) {
			throw new Exception("Unable to connect to the database");
		}

		$connected = mysql_select_db('phpDevelopment',$this->_hdb);
		if (! $connected) {
			throw new Exception("Unable to use the database");
		}

		$sql = "SELECT * FROM users WHERE UserID = $userID";
		$rs = mysql_query($sql,$this->_hdb);

		if (! mysql_num_rows($rs)) {
			throw new Exception("No User exists");
		}

		$this->_properties['id'] = $row['UserID'];
		$this->_properties['surname'] = $row['Surname'];
		$this->_properties['forename'] = $row['Forename'];
	}


	function __get($propertyName) {
		echo "dsdsdsd";
		if (!array_key_exists($propertyName, $this->_properties))
			throw new Exception('Invalid property value');

		if (method_exists($this, 'get' . $propertyName)) {
			return call_user_func(array($this, 'get' . $propertyName));
		} else {
			return $this->_Properties[$propertyName];
		}
	}


	function __set($propertyName,$value) {
		if(!array_key_exists($propertyName, $this->_properties))
			throw new Exception ('Invalid property Value');	

		if(method_exists($this, 'set' . $propertyName)) {
			return call_user_func(array($this, 'set' . $propertyName),
			$value);
		}	else {
			$this->_Properties[$propertyName] = $value;	
		}
	}


	function setID($value) {
		throw new Exception("User ID cannot be modified");
	}

	function sayHello() {
		print "My name is {$this->forename} . {$this->surname} and my ID is {$this->id}";
	}

}

[snipered]

I've moved this to the OO section.