PHP基于面向对象封装的分页类示例

本文实例讲述了PHP基于面向对象封装的分页类。分享给大家供大家参考，具体如下：<?

本文实例讲述了PHP基于面向对象封装的分页类。分享给大家供大家参考，具体如下：

<?php
 class Page
 {
 protected $num;//每页显示条数
 protected $total;//总记录数
 protected $pageCount;//总页数
 protected $current;//当前页码
 protected $offset;//偏移量
 protected $limit;//分页页码
 /**
 * 构造方法
 * @param int $total 总记录数
 * @param int $num 每页显示条数
 */
 public function __construct($total,$num=5)
 {
 //1.每页显示条数
 $this->num = $num;
 //2.总记录数
 $this->total = $total;
 //3.总页数
 $this->pageCount = ceil($total/$num);
 //4.偏移量
 $this->offset = ($this->current-1)*$num;
 //5.分页页码
 $this->limit = "{$this->offset},{$this->num}";
 //6.初始化当前页
 $this->current();
 }
 /**
 * 初始化当前页
 */
 public function current(){
 $this->current = isset($_GET['page'])?$_GET['page']:'1';
 //判断当前页最大范围
 if ($this->current>$this->pageCount){
 $this->current = $this->pageCount;
 }
 //判断当前页最小范围
 if ($this->current<1){
 $this->current = 1;
 }
 }
 /**
 * 访问没权限访问的属性
 * @param string $key 想访问的属性
 * @return float|int|string 返回对应要改变的条件
 */
 public function __get($key){
 if ($key == "limit") {
 return $this->limit;
 }
 if ($key == "offset") {
 return $this->offset;
 }
 if ($key == "current") {
 return $this->current;
 }
 }
 /**
 * 处理分页按钮
 * @return string 拼接好的分页按钮
 */
 public function show(){
 //判断初始页码
 $_GET['page'] = isset($_GET['page'])?$_GET['page']:'1';
 //将$_GET值赋给上下变量
 $first = $end = $prev = $next = $_GET;
 // var_dump($prev);
 //上一页
 //判断上一页范围
 if ($this->current-1<1){
 $prev['page'] = 1;
 }else{
 $prev['page'] = $this->current-1;
 }
 //下一页
 //判断下一页范围
 if ($this->current+1>$this->pageCount) {
 $next["page"] = $this->pageCount;
 }else{
 $next['page'] = $this->current+1;
 }
 /*
 首页
 $first['page'] = 1; 
 //尾页
 $end['page'] = $this->pageCount;
 */
 //拼接路径
 $url = "http://".$_SERVER["SERVER_NAME"].$_SERVER["SCRIPT_NAME"];
 //拼接数组url地址栏后缀?传入参数
 //http://xxx/xxx/Page.class.php?page=值
 $prev = http_build_query($prev);
 $next = http_build_query($next);
 // $first = http_build_query($first);
 // $end = http_build_query($end);
 //拼接完整路径
 $prevpath = $url."?".$prev;
 $nextpath = $url."?".$next;
 // $firstpath = $url."?".$first;
 // $endpath = $url."?".$end;
 $str = "共有{$this->total}条记录 共有{$this->pageCount}页 ";
 $str .= "<a href='{$url}?page=1'>首页</a> ";
 $str .= "<a href='{$prevpath}'>上一页</a> ";
 $str .= "<a href='{$nextpath}'>下一页</a> ";
 $str .= "<a href='{$url}?page={$this->pageCount}'>尾页</a> ";
 return $str;
 }
 }
 //自行调试
 $a = new Page(10);
 echo $a->show();
?>