[RESOLVED] OOP: Instantiating a synamic classname (created on the fly from string and variable)

[voidstate]

Hi

I am having trouble working out how to instantiate a class. Which class to instantiate is chosen on the fly, by combining a string and a GET variable.

Examples of $_GET['ipn'] might be 'nochex' or 'worldpay', each of which needs a seperate class calling.

require_once( 'payment_' . $_GET['ipn'] . '.class.php' );
$payment = new {'payment_' . $_GET['ipn']}( $this ); 	// this is the line that doesn't work
$payment->_process_ipn();

I've also tried the following without success

require_once( 'payment_' . $_GET['ipn'] . '.class.php' );
eval('$payment = new payment_' . $_GET['ipn'] . '( $this )' );  // this is the line that doesn't work
$payment->_process_ipn();

Any ideas?

voidstate

[voidstate]

Typical - as soon as I post it, I figure out how to fix it.

In case you're interested, this worked:

$payment_classname = 'payment_' . $_GET['ipn'];
$payment = new $payment_classname( $this );

From the manual:

...variable variables cannot be used with PHP's Superglobal arrays within functions or class methods.

:o

Cheers for looking,

voidstate