This tiopic table has several fields

Question

$table_name="tiopic";//Query table name setting $perpage=5;//Number of data displayed on each page//Maximum number of pages and total number of records$total_sql="select count(*) from $table_name";$total_result =mysqli_query($conn,$total_sql);$total_row=mysqli_fetch_row($total_result);$total = $total_row[0];//Get the maximum number of pages $total_page = ceil($total/$perpage );//Upward integer//Critical point $page=$page>$total_page ? $total_page:$page;//Situation when the next page number is greater than the maximum page number//Paging setting initialization $start=($page- 1)*$perpage;$sql="select * from tiopic order by id desc limit $start ,$perpage";$que=mysqli_query($conn,$sql);$sum=mysqli_num_rows($que);