ClassFilterIterator

/**
 * ClassFilterIterator.
 * 
 * Filter classes by name
 */
class ClassFilterIterator extends \FilterIterator
{
    protected $contains;
 
    public function __construct(\Traversable $iterator, $contains)
    {
        $this->contains = $contains;
 
        parent::__construct($iterator);
    }
 
    public function accept()
    {
        return preg_match('/'.preg_quote($this->contains).'/i', $this->current());
    }
}
 
/**
 * Countable Append Iterator
 */
class CountableAppendIterator extends \AppendIterator implements \Countable
{
    public function count()
    {
        return count(iterator_to_array($this));
    }
}
 
/**
 * Example
 **/
 
$append = new CountableAppendIterator();
$classes = new \ArrayIterator(get_declared_classes());
 
$zendClasses = new ClassFilterIterator($classes, 'Zend');
$append->append($zendClasses);
 
// herhaal dit mocht je framework klassen gebruiken die niet Zend bevatten, bijv. doctrine:
// $doctrineClasses = new ClassFilterIterator($classes, 'Doctrine');
// $append->append($doctrineClasses);
 
// het aantal klassen
echo count($append);