<?php
class DynamicProperties { }
$object = new DynamicProperties;

print isset($object->foo) ? 't' : 'f'; // f

// Set Dynamic Properties foo and fooz
$object->foo = 'bar';
$object->fooz = 'baz';

// Isset and Unset work
isset($object->foo); // true
unset($object->foo); 

// Iterate through Properties and Values
foreach($object as $property => $value)  {
     print($property . ' = ' . $value . '<br />');
}
// Prints:
//   fooz = baz