i have a problem, i have a error message
Fatal error: Call to undefined function prepayment() in /var/www/web586/html/safelistprox/safelistprox/payment/paypal/paypal.inc.php on line 9
PHP
<?php
class prepayment_ex {
var $p3 = null;
var $t3 = null;
function prepayment_ex($goal, $userinfo, $payr, $so = '') {
define( 'PAYMENT_SYSTEM', 'paypal' );
PrePayment( $goal, $userinfo, $payr, $so );
}why the error message