dynamic class names in php

Question

I have a base class called field and classes that extend this class such as text, select, radio, checkbox, <

Answer 1

This should be enough:

$field_type = 'checkbox';
$field = new $field_type();

Code I tested it with in PHP 5.3

$c = 'stdClass';

$a = new $c();

var_dump($a);

>> object(stdClass)#1 (0) {
}