PHP: How to create class by its name? [duplicate]

Question

Possible Duplicate:
Php dynamic class construction

How i can create an object from class by its name?

Like this

$name = "test";
$test = "text from var";
print ${$name};

Answer 1

<?php
class SomeClass {

    public function __construct() {
        echo "construct SomeClass";
    }
}

$className = 'SomeClass';
$obj = new $className();

Output: construct SomeClass