php通用分页类

思路还是比较简单的，传入你需要被分页的地址，返回分页的数据和分页导航条.........

对数据库的操作，比如 主机名，数据库名，数据表名，用户名，密码，编码等可以写入在一个php配置文件里。 随便修改一下就行了

<?phpclass Rollpage{    //有多少条数据    private $total_items;    //分页数    private $total_page;    //当前页    private $current_page;    //分页大小    private $page_size=15;    //整体翻页大小    private $rollpage_size=10;    /*     * $total_page = ceil($total_item / $page_size);     */    //被分页的页面地址    private $page_href;    //首页    private $home_link;    //尾页    private $tail_link;    //上一页    private $prev_link;     //数字翻页    private $num_link;    //下一页    private $next_link;    //跳转框    private $form_link;    //导航条    private $nagv_link;    //数据库连接句柄    private $conn;//接受需要被分页的地址,,,这里可以把对数据库操作的事情写入配置项里，这样就是一个通用的分页类    public function __construct($href)    {        $this->page_href = $href;        //获取分页大小        $this->conn = new mysqli("localhost", "root", "cai123", "words");        $result = $this->conn->query("select count(*) from image");        $this->total_items = $result->fetch_row()[0];        $result->free();        $this->total_page = ceil($this->total_items / $this->page_size);        //对参数的边界检查        $this->boundCheck();    }    private function boundCheck()    {        if(!isset($_GET['offset']))        {            $this->current_page = 1;        }        else        {            if($_GET['offset'] > $this->total_page)            {                $this->current_page = $this->total_page;            }            else if($_GET['offset'] < 1)            {                 $this->current_page = 1;            }            else            {                 $this->current_page = $_GET['offset'];            }        }    }       //显示跳转框    private function jumpPage()    {        $this->form_link = "<form  action='{$this->page_href}' method='get' style='display: inline;'><input type='text' name='offset' style='width:40px;' > "."<input type='submit' value='跳转' id='submit' style = 'width: 35px; height: 20px ; margin-top: 2px ; padding:1px;' ></form> ";    }    //首页    private function homePage()    {        $this->home_link = "<a href='{$this->page_href}?offset=1'"." style='text-decoration:none ;'>首页</a> ";    }    //尾页    private function tailPage()    {        $this->tail_link = "<a href ='".$this->page_href."?offset=".$this->total_page." '  style='text-decoration:none ;' >尾页</a>   ";    }    //下一页    private function nextPage()    {        if($this->current_page < $this->total_page)        {            $next_page = $this->current_page + 1;            $this->next_link = "<a href='{$this->page_href}"."?offset={$next_page}' "." style=\"text-decoration:none\" > ".'下一页'."<a> ";        }    }    //上一页    private function prevPage()    {        if($this->current_page > 1)        {                $next_page = $this->current_page-1;                $this->prev_link = "<a href='{$this->page_href}"."?offset={$next_page}' "." style=\"text-decoration:none\" > ".'上一页'."<a> ";        }    }    //显示数字分页    private function numPage()    {        //如果总页数大于10（即设置的每次显示十页$this->rollpage_size）        if($this->total_page > $this->rollpage_size)        {            $start = floor(($this->current_page - 1)/$this->rollpage_size)*$this->rollpage_size +1 ;            $end = $start + $this->rollpage_size;            //向前翻十页            if($this->current_page > $this->rollpage_size)            {                $offset = $start-1;$this->num_link .= "<a href='{$this->page_href}"."?offset={$offset}' "." style=\"text-decoration:none\" > ".'<<<'."<a> ";            }            //每次显示十页            for($start; $start < $end; $start++)            {                if($start < $this->total_page)                {                     //如果等于当前页                    if($this->current_page == $start)                    {                            $this->num_link .= "<span style='text-decoration:none; font-size: 19px; color: white;' >".$start."</span> ";                    }                    else                    {                            $this->num_link .= "<a href='{$this->page_href}"."?offset={$start}' "." style=\"text-decoration:none\" >".$start."<a> ";                    }                }            }            //向后翻10页            if($end < $this->total_page)            {               $this->num_link .= "<a href='{$this->page_href}"."?offset={$end}' "." style=\"text-decoration:none\" > ".'>>>'."<a> ";            }        }        //如果总页数小于10（即设置的每次显示十页$this->rollpage_size），则显示所有页        else        {            for($i=1; $i <= $this->total_page;$i++)            {                //当前页时，突出显示                if($this->current_page == $i)                {                        $this->num_link .= "<span style='text-decoration:none; font-size: 19px; color: white;' >".$i."</span> ";                }                else                {                        $this->num_link .= "<a href='{$this->page_href}"."?offset=$i' "." style=\"text-decoration:none\" >".$i."<a> ";                }            }        }    }//生成导航条    private  function getNagv()    {        $this->homePage();        $this->prevPage();        $this->numPage();        $this->nextPage();        $this->tailPage();        $this->jumpPage();        $this->nagv_link = $this->home_link.$this->prev_link.$this->num_link.$this->next_link.$this->tail_link.$this->form_link;        return $this->nagv_link;    }//生成需要显示的数据 private function getData()    {        $sql = "select link from image limit ".($this->current_page-1)*$this->page_size.' , '.$this->page_size;        $result = $this->conn->query($sql);        $links = array();        if($result->num_rows)        {            while($row = $result->fetch_row())            {                $links[] = $row[0];            }            $result->free();           return $links;        }        else        {            die("查询失败");        }    }//接口： 返回显示的数据和分页导航条public function getResult(){$result['nagv']=$this->getNagv();$result['data']=$this->getData();return $result;}}?>