CiviCRM Community Forums (archive)

I'm looking for a way to hide a custom field exposed via a profile on a contribution page in the condition there's already a value for the current user. I'm using the buildForm hook to attempt to do this. Here's the code I've written so far:

function testmodule_civicrm_buildForm( $formName, &$form ) {

        global $user;

if ($user->uid) { // Authenticated User
$contact_id = (int)civicrm_api('uf_match','getvalue',array('version' => 3, 'uf_id' => $user->uid, 'return' => 'contact_id'));
} else {
return; // Don't need to do anything for anonymous
}

if ( $formName == 'CRM_Contribute_Form_Contribution_Main' ) {
           
            require_once 'CRM/Core/BAO/CustomField.php';
            $referredByFieldID = CRM_Core_BAO_CustomField::getCustomFieldID('Referred By', 'Marketing');
    $referredByFieldName = 'custom_'.$referredByFieldID;

            if (array_key_exists($referredByFieldID, $results['values'])) {

$referredByValue = $results['values'][$referredByFieldID][0];

if( (isset($referredByValue)) && (!empty($referredByValue)) ) { // if contact has already specified this, don't ask again!

$form->removeElement($referredByFieldName, true);
unset($form->_fields[$referredByFieldName]);

}
   }
      }
}

It does actually remove the field from the contribution page. However, the field's post help still displays, so I'm wondering if there's a way to remove that as well AND/OR if I'm doing this in the best way.

That's definitely a valid alternative approach and I do appreciate the suggestion. However, there are two complications:

1) We don't want to force an extra step of creating and validating an account before going to the contribution page to become a member.
2) We don't need to gather a "referred by" value from people who are simply creating an account. We only need to gather it when they become a member.

I could also create a separate contribution page for becoming a member VS. renewing a membership as another valid alternative approach. But ultimately I'm hoping to learn how to effectively show/hide fields from Civi contribution pages/registration pages/profiles through hooks because I can think of other instances for doing so.