一个优秀php分页类和大家分享

以前写的一个php分页类，基本上能实现大家一些分页功能的实现，具体关于怎么使用大家可以看看我空间的另一篇关于，记录ip和pv的博文，主要是在查询数据库时当我们组织sql语句的时候，加上 limit 就可以了，如果表单使用get方式也可以实现搜索结果的分页显示，因为在类中已经组织好了URL地址。

<?php
class Page{
    private $total_rows;   //总记录数
    private $total_page;   //总页数
    private $onepage_rows; //每页显示行数
    private $self_page;    //当前页
    private $url;          //URL地址
    private $page_rows;    //页码数量
    private $start_id;     //当前页起始ID
    private $end_id;       //当前页结束ID
    private $desc=array();

    /**
     * 构造函数
     *
     * @access  public
     * @param   integer  $total             总条数
     * @param   integer  $rows              每页显示行数
     * @param   integer  $page_rows         页码数量
     * @param   string   $desc              分页文字描述
     */
    function __construct($total,$rows=10,$page_rows=8,$desc=''){
        $this->total_rows = $total;//总条数
        $this->onepage_rows = $rows;//每页显示行数
        $this->page_rows = $page_rows;//页码数量
        $this->total_page = ceil($this->total_rows/$this->onepage_rows);//总页数
        $this->self_page = min($this->total_page,max((int)@$_GET['page'],1));//当前页
        $this->start_id = ($this->self_page-1)*$this->onepage_rows+1;//起始ID
        $this->end_id = min($this->total_rows,$this->self_page*$this->onepage_rows);
        $this->url = $this->requestUrl();//配置URL地址
        $this->desc = $this->desc($desc);//分页文字描述
        //var_dump($this->desc);
    }

    /**
     * 配置url地址
     *
     * @access    private
     * @return    string       返回配置好的url地址
     */
    private function requestUrl(){
        /* echo "<pre>";
          //print_r($_SERVER);
        echo "</pre>";
         */
        $url = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : $_SERVER['PHP_SELF'].$_SERVER['QUERY_STRING'];
        //解析url地址，返回数组
        $request_arr = parse_url( $url );
        if( isset($request_arr['query']) ){
            //解析请求参数
            parse_str($request_arr['query'],$arr);
            //删除参数中的page元素
            unset($arr['page']);
            //合并路径及请求参数为标准的URL地址
            $url = $request_arr['path'].'?'.http_build_query($arr).'&page=';
        }else{
            //没有请求参数GET的情况
            $url = strstr($url, '?') ? $url."page=" : $url."?page=";
        }
        return $url;
    }

    /**
     * 配置 分页文字描述方法
     *
     * @access   private
     * @param    array     $desc  分页的描述
     * @return   array
     */
    private function desc($desc){
        //默认文字描述
        $d = array(
                "pre"=>"上一页",
                "next"=>"下一页",
                "first"=>"首页",
                "end"=>"末页",
                "unit"=>"条",);
        if( emptyempty($desc) || !is_array($desc) ){
            return $d;
        }
        //过滤没有值的数组
        function filter($v){
            return !emptyempty($v);
        }
        //合并数组
        return array_merge( $d , array_filter($desc,"filter") );
    }
    /**
     * SQL limit语句，控制每页显示行数
     *
     * @access    public
     * @return    string
     */
    function limit(){
        return "LIMIT ".max( 0 , ($this->self_page-1)*$this->onepage_rows ).",".$this->onepage_rows;
    }

    /**
     * 上一页
     *
     * @access    public
     * @return    string
     */
    function pre(){
        return $this->self_page > 1 ? "<a href='".$this->url.($this->self_page-1)."'>".$this->desc['pre']."</a>" : "";
    }


    /**
     * 下一页
     *
     * @access    public
     * @return    string
     */

    function next(){
        return $this->self_page < $this->total_page ? "<a href='".$this->url.($this->self_page+1)."'>".$this->desc['next']."</a>" : "";
    }

    /**
     * 首页
     *
     * @access    public
     * @return    string
     */
    function first(){
        return $this->self_page > 1 ? "<a href='{$this->url}1'>{$this->desc['first']}</a>" : "";
    }

    /**
     * 尾页
     *
     * @access    public
     * @return    string
     */
    function end(){
        return $this->self_page < $this->total_page ? "<a href='{$this->url}{$this->total_page}'>{$this->desc['end']}</a>" : "";
    }

    /**
     * 当前记录数
     *
     * @access    public
     * @return    string
     */
    function nowPage(){
        return "第".$this->start_id."{$this->desc['unit']}-{$this->end_id}{$this->desc['unit']}";
    }

    /**
     * 返回当前页码
     *
     * @access    public
     * @return    string
     */
    function selfnum(){
        return $this->self_page;
    }

    /**
     * 统计数据信息
     *
     * @access    public
     * @return    string
     */
    function count(){
        return "<span>总共有: {$this->total_page} 页&nbsp;&nbsp;总计: {$this->total_rows} 条</span>";
    }

    /**
     * 前几页
     *
     * @access    public
     * @return    string
     */
    function pres(){
        $num = $this->self_page - $this->page_rows;
        return $this->self_page > $this->page_rows ? "<a href='".$this->url.$num."'>".'前'.$this->page_rows.'页'."</a>" :"";
    }

    /**
     * 后几页
     *
     * @access    public
     * @return    string
     */
    function nests(){
        $num = $this->self_page + $this->page_rows;
        return $this->self_page < $this->total_page - $this->page_rows ? "<a href='{$this->url}$num'>后{$this->page_rows}页</a>" : "";
    }
    /**
     * 获得页面数组
     *
     * @access    private
     * @return    string
     */
    private  function pagelist(){
        $pageList = array();
        $start = max( 1 , min( $this->self_page - ceil($this->page_rows/2), $this->total_page - $this->page_rows ));
        $end = min( $this->total_page , $start+$this->page_rows );
        for( $i=$start;$i<=$end;$i++ ){
            if( $i == $this->self_page ){
                //变量是当前页时，去掉链接
                $pageList[$i]['url'] = "";
                $pageList[$i]['str'] = $i;
                continue;
            }
            $pageList[$i]['url'] = $this->url.$i;
            $pageList[$i]['str'] = $i;
        }
        return $pageList;
     }

     /**
      * 字符串分页
      *
      * @access    public
      * @return    string
      */
     function strList(){
         $arr = $this->pagelist();
         $pageList = "";
         foreach( $arr as $v ){
             $pageList .= emptyempty($v['url']) ? "<strong>".$v['str']."</strong>" : "<a class='alink' href='{$v['url']}'>{$v['str']}</a>";
         }
         return $pageList;
     }

     /**
      * 下拉列表分页
      *
      * @access    public
      * @return    string
      */
     function selectList(){
        $arr = $this->pagelist();
        $pageList = "";
        $pageList .= "<select class='sel' onchange='javascript:location.href = this.options[selectedIndex].value'>";
        foreach( $arr as $v ){
            $pageList .= emptyempty($v['url']) ? "<option value='{$v['url']}{$v['str']}' selected='selected'>{$v['str']}</option>" : "<option value='{$v['url']}'>{$v['str']}</option>";
        }
        $pageList .= "</select>";
        return $pageList;
     }

     /**
      * 直接输入 跳转分页
      *
      * @access    public
      * @return    string
      */
     function inputList(){
        //相应 enter 键盘事件
        $pageList = "<input type='text' value = '{$this->self_page}' id='pageinput' class='pageinput' onkeydown=\"
        javascript:if(event.keyCode==13){
        location.href='{$this->url}'+this.value;
        };\"/>
        <button
        var url = document.getElementById('pageinput').value;
        location.href='{$this->url}'+url;
        \"/>
        跳转</button>
        ";
        return $pageList;
     }

     /**
      * 分页几种组合样式
      *
      * @param    integer   $style_id   样式的编号
      * @return   string
      */
     public function styleList($style_id){
        switch ($style_id){
            case 1:
                return $this->pre().$this->strlist().$this->next();
            case 2:
                return $this->pre().$this->strlist().$this->next().$this->count();
            case 3:
                return $this->pres().$this->select().$this->nexts();
        }
     }

}