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PHP paging class example analysis

Jan 10, 2018 pm 04:08 PM
php Pagination Case Analysis

本文主要分享了一段完美的php分页类,具有一定的参考价值,感兴趣的小伙伴们可以参考一下,希望能帮助大家。

本文实例为大家分享了php分页类的具体代码,供大家参考,具体内容如下


<?php
  /**
    file: page.class.php 
    完美分页类 Page 
  */
  class Page {
    private $total;              //数据表中总记录数
    private $listRows;             //每页显示行数
    private $limit;              //SQL语句使用limit从句,限制获取记录个数
    private $uri;               //自动获取url的请求地址
    private $pageNum;             //总页数
    private $page;              //当前页  
    private $config = array(
        &#39;head&#39; => "条记录", 
        &#39;prev&#39; => "上一页", 
        &#39;next&#39; => "下一页", 
        &#39;first&#39;=> "首页", 
        &#39;last&#39; => "末页"
      );           
    //在分页信息中显示内容,可以自己通过set()方法设置
    private $listNum = 10;           //默认分页列表显示的个数

    /**
      构造方法,可以设置分页类的属性
      @param  int  $total    计算分页的总记录数
      @param  int  $listRows  可选的,设置每页需要显示的记录数,默认为25条
      @param  mixed  $query  可选的,为向目标页面传递参数,可以是数组,也可以是查询字符串格式
      @param   bool  $ord  可选的,默认值为true, 页面从第一页开始显示,false则为最后一页
     */
    public function __construct($total, $listRows=25, $query="", $ord=true){
      $this->total = $total;
      $this->listRows = $listRows;
      $this->uri = $this->getUri($query);
      $this->pageNum = ceil($this->total / $this->listRows);
      /*以下判断用来设置当前面*/
      if(!empty($_GET["page"])) {
        $page = $_GET["page"];
      }else{
        if($ord)
          $page = 1;
        else
          $page = $this->pageNum;
      }

      if($total > 0) {
        if(preg_match(&#39;/\D/&#39;, $page) ){
          $this->page = 1;
        }else{
          $this->page = $page;
        }
      }else{
        $this->page = 0;
      }
      
      $this->limit = "LIMIT ".$this->setLimit();
    }

    /**
      用于设置显示分页的信息,可以进行连贯操作
      @param  string  $param  是成员属性数组config的下标
      @param  string  $value  用于设置config下标对应的元素值
      @return  object      返回本对象自己$this, 用于连惯操作
     */
    function set($param, $value){
      if(array_key_exists($param, $this->config)){
        $this->config[$param] = $value;
      }
      return $this;
    }
    
    /* 不是直接去调用,通过该方法,可以使用在对象外部直接获取私有成员属性limit和page的值 */
    function __get($args){
      if($args == "limit" || $args == "page")
        return $this->$args;
      else
        return null;
    }
    
    /**
      按指定的格式输出分页
      @param  int  0-7的数字分别作为参数,用于自定义输出分页结构和调整结构的顺序,默认输出全部结构
      @return  string  分页信息内容
     */
    function fpage(){
      $arr = func_get_args();

      $html[0] = "<span class=&#39;p1&#39;> 共<b> {$this->total} </b>{$this->config["head"]} </span>";
      $html[1] = " 本页 <b>".$this->disnum()."</b> 条 ";
      $html[2] = " 本页从 <b>{$this->start()}-{$this->end()}</b> 条 ";
      $html[3] = " <b>{$this->page}/{$this->pageNum}</b>页 ";
      $html[4] = $this->firstprev();
      $html[5] = $this->pageList();
      $html[6] = $this->nextlast();
      $html[7] = $this->goPage();
      
      $fpage = &#39;<p style="font:12px \&#39;\5B8B\4F53\&#39;,san-serif;">&#39;;
      if(count($arr) < 1)
        $arr = array(0, 1,2,3,4,5,6,7);
      
      for($i = 0; $i < count($arr); $i++)
        $fpage .= $html[$arr[$i]];
    
      $fpage .= &#39;</p>&#39;;
      return $fpage;
    }
    
    /* 在对象内部使用的私有方法,*/
    private function setLimit(){
      if($this->page > 0)
        return ($this->page-1)*$this->listRows.", {$this->listRows}";
      else
        return 0;
    }

    /* 在对象内部使用的私有方法,用于自动获取访问的当前URL */
    private function getUri($query){  
      $request_uri = $_SERVER["REQUEST_URI"];  
      $url = strstr($request_uri,&#39;?&#39;) ? $request_uri : $request_uri.&#39;?&#39;;
      
      if(is_array($query))
        $url .= http_build_query($query);
      else if($query != "")
        $url .= "&".trim($query, "?&");
    
      $arr = parse_url($url);

      if(isset($arr["query"])){
        parse_str($arr["query"], $arrs);
        unset($arrs["page"]);
        $url = $arr["path"].&#39;?&#39;.http_build_query($arrs);
      }
      
      if(strstr($url, &#39;?&#39;)) {
        if(substr($url, -1)!=&#39;?&#39;)
          $url = $url.&#39;&&#39;;
      }else{
        $url = $url.&#39;?&#39;;
      }
      
      return $url;
    }

    /* 在对象内部使用的私有方法,用于获取当前页开始的记录数 */
    private function start(){
      if($this->total == 0)
        return 0;
      else
        return ($this->page-1) * $this->listRows+1;
    }

    /* 在对象内部使用的私有方法,用于获取当前页结束的记录数 */
    private function end(){
      return min($this->page * $this->listRows, $this->total);
    }

    /* 在对象内部使用的私有方法,用于获取上一页和首页的操作信息 */
    private function firstprev(){
      if($this->page > 1) {
        $str = " <a href=&#39;{$this->uri}page=1&#39;>{$this->config["first"]}</a> ";
        $str .= "<a href=&#39;{$this->uri}page=".($this->page-1)."&#39;>{$this->config["prev"]}</a> ";    
        return $str;
      }

    }
  
    /* 在对象内部使用的私有方法,用于获取页数列表信息 */
    private function pageList(){
      $linkPage = " <b>";
      
      $inum = floor($this->listNum/2);
      /*当前页前面的列表 */
      for($i = $inum; $i >= 1; $i--){
        $page = $this->page-$i;

        if($page >= 1)
          $linkPage .= "<a href=&#39;{$this->uri}page={$page}&#39;>{$page}</a> ";
      }
      /*当前页的信息 */
      if($this->pageNum > 1)
        $linkPage .= "<span style=&#39;padding:1px 2px;background:#BBB;color:white&#39;>{$this->page}</span> ";
      
      /*当前页后面的列表 */
      for($i=1; $i <= $inum; $i++){
        $page = $this->page+$i;
        if($page <= $this->pageNum)
          $linkPage .= "<a href=&#39;{$this->uri}page={$page}&#39;>{$page}</a> ";
        else
          break;
      }
      $linkPage .= &#39;</b>&#39;;
      return $linkPage;
    }

    /* 在对象内部使用的私有方法,获取下一页和尾页的操作信息 */
    private function nextlast(){
      if($this->page != $this->pageNum) {
        $str = " <a href=&#39;{$this->uri}page=".($this->page+1)."&#39;>{$this->config["next"]}</a> ";
        $str .= " <a href=&#39;{$this->uri}page=".($this->pageNum)."&#39;>{$this->config["last"]}</a> ";
        return $str;
      }
    }

    /* 在对象内部使用的私有方法,用于显示和处理表单跳转页面 */
    private function goPage(){
        if($this->pageNum > 1) {
        return &#39; <input style="width:20px;height:17px !important;height:18px;border:1px solid #CCCCCC;" type="text" onkeydown="javascript:if(event.keyCode==13){var page=(this.value>&#39;.$this->pageNum.&#39;)?&#39;.$this->pageNum.&#39;:this.value;location=\&#39;&#39;.$this->uri.&#39;page=\&#39;+page+\&#39;\&#39;}" value="&#39;.$this->page.&#39;"><input style="cursor:pointer;width:25px;height:18px;border:1px solid #CCCCCC;" type="button" value="GO" onclick="javascript:var page=(this.previousSibling.value>&#39;.$this->pageNum.&#39;)?&#39;.$this->pageNum.&#39;:this.previousSibling.value;location=\&#39;&#39;.$this->uri.&#39;page=\&#39;+page+\&#39;\&#39;"> &#39;;
      }
    }

    /* 在对象内部使用的私有方法,用于获取本页显示的记录条数 */
    private function disnum(){
      if($this->total > 0){
        return $this->end()-$this->start()+1;
      }else{
        return 0;
      }
    }
  }
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