Detection of custom fields for mapping flawed

Fields that are used for mapping between custom fields and LDAP fields are currently detected by

strpos($field, "field_") !== FALSE

This is only always true, when fields are created within the Drupal "Manage Fields" UI. However, if the fields are created by code, they don't necessarily follow this naming schema.

The more robust solution IMHO would be querying the field API:

$is_custom_field = field_info_field($field) != null || strpos($field, "field_") !== FALSE;
        
       $is_custom_field = strpos($field, "field_") !== FALSE;
        $fieldinfo =  field_info_field($field);
        if($fieldinfo)
        {
            if(array_key_exists('user', $fieldinfo['bundles']))
            {
                $is_custom_field = true;
            } 
        }

Thanks for checking back.

Chris