php+layui数据表格实现数据分页渲染代码(2)

#这里是PHP类中主要的配合步骤

# 接收layui发送的limit
if (trim($_GET['limit'])) {
 $limit = trim($_GET['limit']);
}else{
 $limit = 15;
}

# 按某字段排序，$rows为数据数组
$sort_num = array_column($rows,'num');
array_multisort($sort_num,SORT_DESC,$rows, SORT_DESC);

# 调用自定义分页函数
$datas = array();
$datas = showpage($rows,$limit);

$items = array();

# 返回layui数据格式
$items['data'] = $datas['rows'];
$items['code'] = 0;
$items['msg'] = 'ok';
$items['count'] = $datas['tot'];

exit(json_encode($items));

# showpage函数

function showpage($rows,$count){ 
 $tot = count($rows); // 总数据条数

 if ($_GET['page']) { //获取当前页码
  $page = $_GET['page'];
 }else{
  $page = 1;
 }

 // $count = $count; # 每页显示条数

 $countpage = ceil($tot/$count); # 计算总共页数

 $start = ($page-1)*$count; # 计算每页开始位置

 $datas = array_slice($rows, $start, $count); # 计算当前页数据

 # 获取上一页和下一页
 if ($page > 1) {
  $uppage = $page-1;
 }else{
  $uppage = 1;
 }

 if ($page < $countpage) {
  $nextpage = $page+1;
 }else{
  $nextpage = $countpage;
 }

 $pages['countpage'] = $countpage;
 $pages['page'] = $page;
 $pages['uppage'] = $uppage;
 $pages['nextpage'] = $nextpage;
 $pages['tot'] = $tot;

 //循环加入序号 , 避免使用$i引起的序号跳位
 $n = 1;
 foreach ($datas as &$data) {
  $data['n'] = $n;
  $n++;
 }
 
 $pages['rows'] = $datas;

 return $pages;
}