Detailed explanation of the definition and usage of PHP paging class

This article mainly introduces the definition and usage of the paging class implemented in PHP. It analyzes the common operations and specific usage techniques of the paging class encapsulated in PHP based on specific examples. Friends in need can refer to it

The details are as follows :

<?php
  class Page {
     private $total;   //总记录
     private $pagesize;  //每页显示多少条
     private $limit;     //limit
     private $page;      //当前页码
     private $pagenum;   //总页码
     private $url;      //地址
     private $bothnum;   //两边保持数字分页的量
   //构造方法初始化
   public function __construct($_total, $_pagesize) {
     $this->total = $_total ? $_total : 1;
     $this->pagesize = $_pagesize;
     $this->pagenum = ceil($this->total / $this->pagesize);
     $this->page = $this->setPage();
     $this->limit = "LIMIT ".($this->page-1)*$this->pagesize.",$this->pagesize";
     $this->url = $this->setUrl();
     $this->bothnum = 2;
   }
   //拦截器
   private function __get($_key) {
     return $this->$_key;
   }
   //获取当前页码
   private function setPage() {
     if (!empty($_GET[&#39;page&#39;])) {
        if ($_GET[&#39;page&#39;] > 0) {
          if ($_GET[&#39;page&#39;] > $this->pagenum) {
             return $this->pagenum;
          } else {
             return $_GET[&#39;page&#39;];
          }
        } else {
          return 1;
        }
     } else {
        return 1;
     }
   }
   //获取地址
   private function setUrl() {
     $_url = $_SERVER["REQUEST_URI"];
     $_par = parse_url($_url);
     if (isset($_par[&#39;query&#39;])) {
        parse_str($_par[&#39;query&#39;],$_query);
        unset($_query[&#39;page&#39;]);
        $_url = $_par[&#39;path&#39;].&#39;?&#39;.http_build_query($_query);
     }
     return $_url;
   }   //数字目录
   private function pageList() {
     for ($i=$this->bothnum;$i>=1;$i--) {
      $_page = $this->page-$i;
      if ($_page < 1) continue;
        $_pagelist .= &#39; <a href="&#39;.$this->url.&#39;&page=&#39;.$_page.&#39;" rel="external nofollow" rel="external nofollow" >&#39;.$_page.&#39;</a> &#39;;
     }
     $_pagelist .= &#39; <span class="me">&#39;.$this->page.&#39;</span> &#39;;
     for ($i=1;$i<=$this->bothnum;$i++) {
      $_page = $this->page+$i;
        if ($_page > $this->pagenum) break;
        $_pagelist .= &#39; <a href="&#39;.$this->url.&#39;&page=&#39;.$_page.&#39;" rel="external nofollow" rel="external nofollow" >&#39;.$_page.&#39;</a> &#39;;
     }
     return $_pagelist;
   }
   //首页
   private function first() {
     if ($this->page > $this->bothnum+1) {
        return &#39; <a href="&#39;.$this->url.&#39;" rel="external nofollow" >1</a> ...&#39;;
     }
   }
   //上一页
   private function prev() {
     if ($this->page == 1) {
        return &#39;<span class="disabled">上一页</span>&#39;;
     }
     return &#39; <a href="&#39;.$this->url.&#39;&page=&#39;.($this->page-1).&#39;" rel="external nofollow" >上一页</a> &#39;;
   }
   //下一页
   private function next() {
     if ($this->page == $this->pagenum) {
        return &#39;<span class="disabled">下一页</span>&#39;;
     }
     return &#39; <a href="&#39;.$this->url.&#39;&page=&#39;.($this->page+1).&#39;" rel="external nofollow" >下一页</a> &#39;;
   }
   //尾页
   private function last() {
     if ($this->pagenum - $this->page > $this->bothnum) {
        return &#39; ...<a href="&#39;.$this->url.&#39;&page=&#39;.$this->pagenum.&#39;" rel="external nofollow" >&#39;.$this->pagenum.&#39;</a> &#39;;
     }
   }
   //分页信息
   public function showpage() {
     $_page .= $this->first();
     $_page .= $this->pageList();
     $_page .= $this->last();
     $_page .= $this->prev();
     $_page .= $this->next();
     return $_page;
   }
 }
?>

The pagination style is as shown below:

Instructions for use:

<?php
  $_page = new Page($_total,$_pagesize);
  //其中 $_total 是数据集的总条数,$_pagesize 是每页显示的数量.
?>

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