จากตัวอย่างในนี้ เรื่องการแบ่งหน้า mysqli-paging ทำไมเวลาทำแล้วมันแสดงเพี้ยนครับ

$row_end = $per_page * $page;
  if($row_end > $num_rows)
  {
    $row_end = $num_rows;
  }
  
    $sql = "SELECT data_user.*,data_car.*,data_prb.*,data_ins.* FROM data_user 
              left JOIN data_car on data_user.id=data_car.id
              left JOIN data_prb on data_user.id=data_prb.id
              left join data_ins on data_user.id=data_ins.id
              WHERE data_user.member_id = '$_SESSION[login_true]'
              
              ORDER BY data_user.id desc LIMIT $row_start ,$row_end";

$row_end = $per_page * $page;
  if($row_end > $num_rows)
  {
    $row_end = $num_rows;
  }

<?php 
  include("config_mysqli.php") ;

  $sql = "SELECT data_user.*,data_car.*,data_prb.*,data_ins.* FROM data_user 
              left JOIN data_car on data_user.id=data_car.id
              left JOIN data_prb on data_user.id=data_prb.id
              left join data_ins on data_user.id=data_ins.id
              WHERE data_user.member_id = '$_SESSION[login_true]'
              and (name LIKE '%".$strKeyword."%' or car_num LIKE '%".$strKeyword."%')";


  $query = mysqli_query($conn,$sql);

  $num_rows = mysqli_num_rows($query);

  $per_page = 3;   // Per Page
  $page  = 1;
  
  if(isset($_GET["Page"]))
  {
    $page = $_GET["Page"];
  }

  $prev_page = $page-1;
  $next_page = $page+1;

  $row_start = (($per_page*$page)-$per_page);
  if($num_rows<=$per_page)
  {
    $num_pages =1;
  }
  else if(($num_rows % $per_page)==0)
  {
    $num_pages =($num_rows/$per_page) ;
  }
  else
  {
    $num_pages =($num_rows/$per_page)+1;
    $num_pages = (int)$num_pages;
  }
  $row_end = $per_page * $page;
  if($row_end > $num_rows)
  {
    $row_end = $num_rows;
  }
  
    
    $sql .= " ORDER BY data_user.id desc LIMIT $row_start ,$row_end ";
    $query = mysqli_query($conn,$sql); 
echo($sql);
?>