Custom User field in Course stats download version 4 compatible.

customizer_class.php

<?php

if(!class_exists('WPLMS_Customizer_Plugin_Class'))
{   
    class WPLMS_Customizer_Plugin_Class  // We'll use this just to avoid function name conflicts 
    {
        public function __construct(){   
           add_filter('wplms_course_stats_list',array($this,'add_custom_course_stat'));
          add_action('wplms_course_stats_process',array($this,'process_custom_course_stat'),10,7); 
        } // END public function __construct
        
        function add_custom_course_stat($list){
        
        $list['user_field']='Gender';

         return $list;
        }
          
         
        function process_custom_course_stat(&$csv_title, &$csv,&$i,&$course_id,&$user_id,&$field,&$data){

    
          if($field != 'user_field') // Ensures the field was checked.
             return;

          
            $csv_row_title='Gender';
          
          $x = array_filter($csv_title,function($item){ $csv_row_title='Gender';return $item['title'] == $csv_row_title; });

          
          if(count($x) < 1){
                $csv_title[$i]=['title'=>$csv_row_title, 'field'=> 'user_field'];
          }
            

          $ifield = 'Gender'; 


          if(bp_is_active('xprofile'))
           $field_val= bp_get_profile_field_data( 'field='.$ifield.'&user_id=' .$user_id );
                
               

          if(isset($field_val) && $field_val){
            $csv[$i][]= $field_val;
            $data[$i][$field]=$field_val;
          }else{
            $csv[$i][]= 'N.A';
            $data[$i][$field]='N.A';
          }

        }
        // ADD custom Code in clas
        
    } // END class WPLMS_Customizer_Class
} // END if(!class_exists('WPLMS_Customizer_Class'))

?>