CiviCRM Community Forums (archive)

I have developed some code to prorate the fees and reset the end dates for a contribution page form.  I only want this to happen for new members.  Membership renewals should be full price.  I'm looking for a solution that will work even if the form is being used by a non-authenticated user(anonymous). 

Am I correct in assuming the form variable _currentMemberships is a good variable to check to see if the user currently entering data on the form is a member?

Secondly, I am also searching for a contact based on the first name, last name, and email address that is entered by the user through the form. Then I am determining whether their is a member record for that contact id....the problem is that it could be possible for that search  "civicrm_api('Contact','Get'" call to return multiple records.  So its not airtight. 

Is there a better way to determine whether the form was entered by a current member?

function mymodule_civicrm_validateForm( $formName, &$fields, &$files, &$form, &$errors ){
require_once 'api/api.php';

$contact = civicrm_api('Contact','Get',array('first_name' => $form->_elements[1]->_attributes['value'], 'last_name' => $form->_elements[3]->_attributes['value'], 'email_address' =>$form->_elements[14]->_attributes['value'], 'version' =>3));

$member=civicrm_api("Membership","get", array ('version' =>'3' , 'contact_id' => $contact['values'][1]['contact_id'] ));
if($formName == 'CRM_Contribute_Form_Contribution_Main' && $form->_values['title']=='Membership Signup' && $form->_id=='1' && !$form->_currentMemberships && !$member['count']){
//prorate the fee
}
}

I know this is an old thread, but I ran into the same problem.  I posted my solution at http://forum.civicrm.org/index.php/topic,30332.0.html