CiviCRM Community Forums (archive)

Hi,
 Could anyone please tell  what is wrong with the following code. 

$url = 'civicrm/contribute/transact';
$returnURL = CRM_Utils_System::url( $url, "_qf_ThankYou_display=1&qfKey=$qfKey",true,null,false);                                                                             

CRM_Utils_System::redirect( $returnURL );

this code is supposed to redirect me to the thank you page after making contributions  but it is not redirecting me to anywhere .i  checked $returnURL value and found that it is empty. 

how does CRM_Utils_System::url works and what is its return value.

where can i find info about this function .

thanks in advance.

robezy