PHP: how to get a list of classes that implement certain interface?

Question

I\'ve got an interface

interface IModule {
    public function Install();
}

and some classes that implement this interface

Answer 1

You can use PHP's ReflectionClass::implementsInterface and get_declared_classes functions to accomplish this:

$classes = get_declared_classes();
$implementsIModule = array();
foreach($classes as $klass) {
   $reflect = new ReflectionClass($klass);
   if($reflect->implementsInterface('IModule')) 
      $implementsIModule[] = $klass;
}