php function with Parse error: syntax error, unexpected '(', expecting T_STRING or T_VARIABLE or '$' [closed]

Question

The PHP function below is producing this error: Parse error: syntax error, unexpected '(', expecting T_STRING or T_VARIABLE or '$', on this line that contens this code:$obj = new ( );

Does anyone know what's wrong?

function createContextAwareObjectOfClass($className) {
    $className;
    $obj = new (  );
    IApplicationContextAware;

    if (!( $obj instanceof null )) {
        Exception;
        throw new ( '' . 'Non-context aware class "' . $className . '" passed to createContextAwareObjectOfClass' );
    }

    $obj->setAppContext( $this );
    return $obj;
}

Answer 1

I think

$obj = new (  );
IApplicationContextAware;

should be

$obj = new IApplicationContextAware();