一個優秀php分頁類和你們分享

之前寫的一個php分頁類，基本上能實現你們一些分頁功能的實現，具體關於怎麼使用你們能夠看看我空間的另外一篇關於，記錄ip和pv的博文，主要是在查詢數據庫時當咱們組織sql語句的時候，加上 limit 就能夠了，若是表單使用get方式也能夠實現搜索結果的分頁顯示，由於在類中已經組織好了URL地址。

<?php
class Page{
    private $total_rows;   //總記錄數
    private $total_page;   //總頁數
    private $onepage_rows; //每頁顯示行數
    private $self_page;    //當前頁
    private $url;          //URL地址
    private $page_rows;    //頁碼數量
    private $start_id;     //當前頁起始ID
    private $end_id;       //當前頁結束ID
    private $desc=array();

    /**
     * 構造函數
     *
     * @access  public
     * @param   integer  $total             總條數
     * @param   integer  $rows              每頁顯示行數
     * @param   integer  $page_rows         頁碼數量
     * @param   string   $desc              分頁文字描述
     */
    function __construct($total,$rows=10,$page_rows=8,$desc=''){
        $this->total_rows = $total;//總條數
        $this->onepage_rows = $rows;//每頁顯示行數
        $this->page_rows = $page_rows;//頁碼數量
        $this->total_page = ceil($this->total_rows/$this->onepage_rows);//總頁數
        $this->self_page = min($this->total_page,max((int)@$_GET['page'],1));//當前頁
        $this->start_id = ($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);//分頁文字描述
        //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，返回數組
        $request_arr = parse_url( $url );
        if( isset($request_arr['query']) ){
            //解析請求參數
            parse_str($request_arr['query'],$arr);
            //刪除參數中的page元素
            unset($arr['page']);
            //合併路徑及請求參數爲標準的URL地址
            $url = $request_arr['path'].'?'.http_build_query($arr).'&page=';
        }else{
            //沒有請求參數GET的狀況
            $url = strstr($url, '?') ? $url."page=" : $url."?page=";
        }
        return $url;
    }

    /**
     * 配置 分頁文字描述方法
     *
     * @access   private
     * @param    array     $desc  分頁的描述
     * @return   array
     */
    private function desc($desc){
        //默認文字描述
        $d = array(
                "pre"=>"上一頁",
                "next"=>"下一頁",
                "first"=>"首頁",
                "end"=>"末頁",
                "unit"=>"條",);
        if( emptyempty($desc) || !is_array($desc) ){
            return $d;
        }
        //過濾沒有值的數組
        function filter($v){
            return !emptyempty($v);
        }
        //合併數組
        return array_merge( $d , array_filter($desc,"filter") );
    }
    /**
     * SQL limit語句，控制每頁顯示行數
     *
     * @access    public
     * @return    string
     */
    function limit(){
        return "LIMIT ".max( 0 , ($this->self_page-1)*$this->onepage_rows ).",".$this->onepage_rows;
    }

    /**
     * 上一頁
     *
     * @access    public
     * @return    string
     */
    function pre(){
        return $this->self_page > 1 ? "<a href='".$this->url.($this->self_page-1)."'>".$this->desc['pre']."</a>" : "";
    }


    /**
     * 下一頁
     *
     * @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>" : "";
    }

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

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

    /**
     * 當前記錄數
     *
     * @access    public
     * @return    string
     */
    function nowPage(){
        return "第".$this->start_id."{$this->desc['unit']}-{$this->end_id}{$this->desc['unit']}";
    }

    /**
     * 返回當前頁碼
     *
     * @access    public
     * @return    string
     */
    function selfnum(){
        return $this->self_page;
    }

    /**
     * 統計數據信息
     *
     * @access    public
     * @return    string
     */
    function count(){
        return "<span>總共有: {$this->total_page} 頁&nbsp;&nbsp;總計: {$this->total_rows} 條</span>";
    }

    /**
     * 前幾頁
     *
     * @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.'頁'."</a>" :"";
    }

    /**
     * 後幾頁
     *
     * @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}$num'>後{$this->page_rows}頁</a>" : "";
    }
    /**
     * 得到頁面數組
     *
     * @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 ){
                //變量是當前頁時，去掉連接
                $pageList[$i]['url'] = "";
                $pageList[$i]['str'] = $i;
                continue;
            }
            $pageList[$i]['url'] = $this->url.$i;
            $pageList[$i]['str'] = $i;
        }
        return $pageList;
     }

     /**
      * 字符串分頁
      *
      * @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;
     }

     /**
      * 下拉列表分頁
      *
      * @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;
     }

     /**
      * 直接輸入 跳轉分頁
      *
      * @access    public
      * @return    string
      */
     function inputList(){
        //相應 enter 鍵盤事件
        $pageList = "<input type='text' value = '{$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;
        \"/>
        跳轉</button>
        ";
        return $pageList;
     }

     /**
      * 分頁幾種組合樣式
      *
      * @param    integer   $style_id   樣式的編號
      * @return   string
      */
     public function styleList($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();
        }
     }

}