Php 分页会产生额外的空白页

大家好我有个问题我的分页有多余的空白页

我有64个项目，每页显示8个项目，所以我期望的页面是从第1页到第8页

但当我使用它时，我的第9页到第12页是空白的

与我的其他类别相同，只有一个项目，它有12页，所以其余11页是空白的，请帮助我提前感谢

这是我的密码

<?php


    $tbl_name="tbl_product";        //your table name
     // How many adjacent pages should be shown on each side?
  $adjacents = 3;

  /* 
     First get total number of rows in data table. 
     If you have a WHERE clause in your query, make sure you mirror it here.
  */
  $query = "SELECT COUNT(*) FROM $tbl_name";
  $total_items = mysql_fetch_array(mysql_query($query));

  /* Setup vars for query. */
  $targetpage = "category.php";   //your file name  (the name of this file)
  $limit = 8;                 //how many items to show per page
  if(isset($_GET['page'])) {
    $page = $_GET['page'];
    $start = ($page - 1) * $limit;      //first item to display on this page
  } else {
    $page = 0;
    $start = 0;               //if no page var is given, set start to 0
  }

  /* Get data. */
  $sql = "SELECT * FROM $tbl_name where categoryID = '$category_id' LIMIT $start, $limit";
  $result = mysql_query($sql);

  /* Setup page vars for display. */
  if ($page == 0) $page = 1;          //if no page var is given, default to 1.
  $prev = $page - 1;              //previous page is page - 1
  $next = $page + 1;              //next page is page + 1
  $lastpage = ceil($total_items[0]/$limit);    //lastpage is = total pages / items per page, rounded up.
  $lpm1 = $lastpage - 1;            //last page minus 1

  /* 
    Now we apply our rules and draw the pagination object. 
    We're actually saving the code to a variable in case we want to draw it more than once.
  */
  $pagination = "";
  if($lastpage > 1)
  { 
    $pagination .= "<div class=\"pagination pagination-centered\"><ul>";
    //previous button
    if ($page > 1) 
      $pagination.= "<li><a href=\"$targetpage?categoryID=$category_id&page=$prev\">previous</a></li>";
    else
      $pagination.= "<li class=\"disabled\"><a href=\"#\">previous</a></li>"; 

    //pages 
    if ($lastpage < 7 + ($adjacents * 2)) //not enough pages to bother breaking it up
    { 
      for ($counter = 1; $counter <= $lastpage; $counter++)
      {
        if ($counter == $page)
          $pagination.= "<li class=\"active\"><a href=\"#\">$counter</a></li>";
        else
          $pagination.= "<li><a href=\"$targetpage?categoryID=$category_id&page=$counter\">$counter</a></li>";         
      }
    }
    elseif($lastpage > 5 + ($adjacents * 2))  //enough pages to hide some
    {
      //close to beginning; only hide later pages
      if($page < 1 + ($adjacents * 2))    
      {
        for ($counter = 1; $counter < 4 + ($adjacents * 2); $counter++)
        {
          if ($counter == $page)
            $pagination.= "<li class=\"active\"><a href=\"#\">$counter</a></li>";
          else
            $pagination.= "<a href=\"$targetpage?categoryID=$category_id&page=$counter\">$counter</a>";         
        }
        $pagination.= "<a href=\"#\">...</a>";
        $pagination.= "<a href=\"$targetpage?categoryID=$category_id&page=$lpm1\">$lpm1</a>";
        $pagination.= "<a href=\"$targetpage?categoryID=$category_id&page=$lastpage\">$lastpage</a>";   
      }
      //in middle; hide some front and some back
      elseif($lastpage - ($adjacents * 2) > $page && $page > ($adjacents * 2))
      {
        $pagination.= "<a href=\"$targetpage?categoryID=$category_id&page=1\">1</a>";
        $pagination.= "<a href=\"$targetpage?categoryID=$category_id&page=2\">2</a>";
        $pagination.= "<a href=\"#\">...</a>";
        for ($counter = $page - $adjacents; $counter <= $page + $adjacents; $counter++)
        {
          if ($counter == $page)
            $pagination.= "<li class=\"active\"><a href=\"#\">$counter</a></li>";
          else
            $pagination.= "<a href=\"$targetpage?categoryID=$category_id&page=$counter\">$counter</a>";         
        }
        $pagination.= "<a href=\"#\">...</a>";
        $pagination.= "<a href=\"$targetpage?categoryID=$category_id&page=$lpm1\">$lpm1</a>";
        $pagination.= "<a href=\"$targetpage?categoryID=$category_id&page=$lastpage\">$lastpage</a>";   
      }
      //close to end; only hide early pages
      else
      {
        $pagination.= "<a href=\"$targetpage?categoryID=$category_id&page=1\">1</a>";
        $pagination.= "<a href=\"$targetpage?categoryID=$category_id&page=2\">2</a>";
        $pagination.= "<a href=\"#\">...</a>";
        for ($counter = $lastpage - (2 + ($adjacents * 2)); $counter <= $lastpage; $counter++)
        {
          if ($counter == $page)
            $pagination.= "<li class=\"active\"><a href=\"#\">$counter</a></li>";
          else
            $pagination.= "<a href=\"$targetpage?categoryID=$category_id&page=$counter\">$counter</a>";         
        }
      }
    }

    //next button
    if ($page < $counter - 1) 
      $pagination.= "<a href=\"$targetpage?categoryID=$category_id&page=$next\">next</a>";
    else
      $pagination.= "<li class=\"disabled\"><a href=\"#\">next</a></li>";
    $pagination.= "</ul></div>\n";   
  }
?>

---

用于计算记录数的查询与用于获取数据的查询不同

更改此代码块：

/*
  First get total number of rows in data table.
  If you have a WHERE clause in your query, make sure you mirror it here.
*/
$query = "SELECT COUNT(*) FROM $tbl_name WHERE categoryID = '$category_id'";
$total_items = mysql_fetch_array(mysql_query($query));

代码中确实有这样一句话：“如果查询中有WHERE子句，请确保在此处镜像它。”

注释有时很重要。
在
$query
变量上使用
WHERE
子句：

WHERE categoryID = '$category_id';

$query = "SELECT COUNT(*) FROM $tbl_name WHERE categoryID = '$category_id'";

$query = "SELECT COUNT(*) FROM $tbl_name WHERE categoryID = '$category_id'";

请不要使用pastebin在此处放置代码。在原始帖子中包含相关代码。对不起，先生，我修复了它，谢谢回复请不要使用此代码-它对SQL注入是开放的