"上一页", "next" => "下一页", "first" => "首 页", "last" => "尾 页");
private $uri;
private $listNum = 8;
/**
* PaginateHelper constructor.
* @param $total int 总记录数
* @param int $listRows 每页显示行数
* @param null $currentPage 当前页码
* @param string $query_string 追加get参数
*/
public function __construct($total, $listRows = 10, $currentPage = null, $query_string = "")
{
$this->total = $total;//总记录数
$this->listRows = $listRows;//每页记录数
$this->pageNum = ceil($this->total / $this->listRows);//计算总页数
$this->uri = $this->getUri($query_string);
$this->setPage($currentPage);
}
/**
* 获取sql的limit语句
* @return string
*/
public function getLimitStr()
{
return "Limit " . ($this->page - 1) * $this->listRows . ", {$this->listRows}";
}
private function setPage($currentPage = null)
{
$page = $currentPage ?: ($_GET["page"]??1);
$page = intval($page);
$this->page = $page > 0 ? ($page > $this->pageNum ? $this->pageNum : $page) : 1;//当前页码
}
/**
* 获取当前uri
* @param $query_string
* @return string
*/
public function getUri($query_string)
{
$url = $_SERVER["REQUEST_URI"] . (strpos($_SERVER["REQUEST_URI"], '?') ? '' : "?") . $query_string;
$parse = parse_url($url);
if (isset($parse["query"])) {
parse_str($parse['query'], $params);
unset($params["page"]);//去除page参数
$url = $parse['path'] . '?' . http_build_query($params);
}
return $url;
}
/**
* 当前页的起始位置
* @return int
*/
public function start()
{
if ($this->total == 0)
return 0;
else
return ($this->page - 1) * $this->listRows + 1;//记录从1开始
}
/**
* 当前页的结束位置
* @return mixed
*/
public function end()
{
return min($this->page * $this->listRows, $this->total);
}
//首页
private function first()
{
$html = "";
if ($this->page == 1)
$html .= '';
else
$html .= " {$this->config["first"]} ";
return $html;
}
//上一页
private function prev()
{
$html = "";
if ($this->page == 1)
$html .= '';
else
$html .= " {$this->config["prev"]} ";
return $html;
}
private function pageList()
{
$linkPage = "";
$inum = floor($this->listNum / 2);
for ($i = $inum; $i >= 1; $i--) {
$page = $this->page - $i;
if ($page < 1)
continue;
$linkPage .= " {$page} ";
}
$linkPage .= " {$this->page} ";
for ($i = 1; $i <= $inum; $i++) {
$page = $this->page + $i;
if ($page <= $this->pageNum)
$linkPage .= " {$page} ";
else
break;
}
return $linkPage;
}
//下一页
private function next()
{
$html = "";
if ($this->page >= $this->pageNum)
$html .= '';
else
$html .= " {$this->config["next"]} ";
return $html;
}
//尾页
private function last()
{
$html = "";
if ($this->page == $this->pageNum)
$html .= '';
else
$html .= " {$this->config["last"]} ";
return $html;
}
//跳到第几页
private function goPage()
{
return ' ';
}
//显示分页
public function fpage($display = array(0, 1, 2, 3, 4, 5, 6, 7, 8))
{
$html[0] = " 共有{$this->total}个记录 ";
$html[1] = " 每页显示{$this->listRows}条，本页{$this->start()}~{$this->end()}条 ";
$html[2] = " {$this->page}/{$this->pageNum}页 ";
$html[3] = $this->first();
$html[4] = $this->prev();
$html[5] = $this->pageList();
$html[6] = $this->next();
$html[7] = $this->last();
$html[8] = $this->goPage();
$fpage = '';
foreach ($display as $index) {
$fpage .= $html[$index];
}
return $fpage;
}
}