Php 此函数返回localhost上的分页，但当我在网站上上载时，分页不起作用

我用于数据显示的查询

$sql=SELECT*FROM$wpdb->postETA wpmeta内部连接$wpdb->posts wp ON wpmeta.post\u id=wp.id，其中wpmeta.meta\u value='.$current\u user->id.' 和wpmeta.meta\u key=''u customer\u user'和wp.post\u type='shop\u order'和wp.post\u status='wc-processing'组（按wp.ID）； IFAsset$\u请求['submit']{ $applct\u name=$\u请求['applct\u name']； $applct_email=$_请求['applct_email']； $applct\u msg=$\u请求['applct\u msg']； $product\U name=$\U请求['product\U name']； $product\U number=$\U请求['product\U number']； $current\u user=wp\u get\u current\u user； $usermeta=array 'name'=>$applct\u name， “email”=>$applct\u email， “产品名称”=>$product\U name， 'message'=>$applct\u msg )

    function get_product_detail(){
    global $woocommerce, $wpdb, $current_user;
    $user =  $current_user->ID;

---

我已经打印了所有变量它显示的值您能解释一下Conrad LotzI会假设您本地PC和主机服务器上的身份验证凭据不同。即数据库主机、用户和密码？但在站点上显示列表的功能相同，只是分页不起作用，

            $flag = 0;
            if($flag==0){
            add_user_meta($user, 'applicant_invite_by', $usermeta);


$headers = 'From: Backcheckgroup.com <noreply@backcheckgroup.com>' . "\r\n";
            wp_mail( $applct_email, 'Verfication Required', $applct_msg, $headers);
            $flag=1;
            echo 'Form submited';
            }else{

                echo 'Already submited';
                }
        }
    echo '<table class="order_detail">';
    echo '<tr>
        <th>No.</th>
        <th>Product ID</th>
        <th>Product Name</th>
        <th>invite user</th>
        <th>Status</th>
    </tr><tbody>';

    $query = $wpdb->query($sql);
    $total = $query;
    $items_per_page = 3;
    $page = isset( $_GET['cpage'] ) ? abs( (int) $_GET['cpage'] ) : 1;
    $offset = ( $page * $items_per_page ) - $items_per_page;

    $service = $wpdb->get_results( $sql . " LIMIT ".$offset.", ".$items_per_page."" );


    foreach( $service as $results ) {

          $orderID = $results->post_id; 
            $order          = new WC_Order($orderID); 
            $status         = $order->status;

            $order_items    = $order->get_items(); 


            if(count($order_items))
            {
                $j=1;
                foreach($order_items as $item){

                    $item_name          = $item['name'];
                    $product_id         = $item['product_id'];
                    $qty                = $item['qty'];

                    echo '<tr class="collaps"><th><span>+</span></th><th>'.$product_id.'</th><th>'.$current_user->billing_first_name.' / '.$current_user->billing_company.'</th><th>Invited(0/'.$qty.')</th><th>Completed(0/'.$qty.')</th></tr>';
                    for($i=1; $i <=$qty; $i++){
                         $numbers = rand(0,100);
                        echo  '<tr class="sub-rows"><td>'.$j.'</td>';   
                        echo '<td>'.$product_id.'</td>';    
                        echo '<td>'.$item_name.'</td>'; 



    echo '<td><a href="javascript:void(0)" data-toggle="modal" data-target="#myModal_'.$numbers.'">invite</a></td>';


                            popup($numbers,  $qty, $item_name,  $user, $product_id);
                        $j++;
                            echo '<td>'.$status.'</td></tr>';   
                    }   


                } 

            } 
        } 
         echo '</tbody></table>';

  echo 'Pagination'.paginate_links( array(
        'base' => add_query_arg( 'cpage', '%#%' ),
        'format' => '',
        'prev_text' => __('«'),
        'next_text' => __('»'),
        'total' => ceil($total / $items_per_page),
        'current' => $page
    ));
        return $data; 
    }