PHP分页类实现-优快云博客

<?php


class page
{
    public     $first_row;        //起始行数

    public     $list_rows;        //列表每页显示行数

    protected $total_pages;      //总页数

    protected $total_rows;       //总行数

    protected $now_page;         //当前页数

    protected $is_ajax = FALSE; //是否ajax

    protected $parameter = '';

    protected $page_name;        //分页参数的名称

    protected $ajax_func_name;

    public     $plus = 3;         //分页偏移量

    protected $url;



    public function __construct($data = array())
    {
        $this->total_rows = $data['total_rows'];

        $this->parameter = !empty($data['parameter']) ? $data['parameter'] : '';
        $this->list_rows = !empty($data['list_rows']) && $data['list_rows'] <= 100 ? $data['list_rows'] : 15;
        $this->total_pages= ceil($this->total_rows / $this->list_rows);
        $this->page_name = !empty($data['page_name']) ? $data['page_name'] : 'p';


        if(!empty($data['now_page']))
        {
            $this->now_page = intval($data['now_page']);
        }else{
            $this->now_page   = !empty($_GET[$this->page_name]) ? intval($_GET[$this->page_name]):1;
        }
        $this->now_page   = $this->now_page <= 0 ? 1 : $this->now_page;


        if(!empty($data['is_ajax']))
        {
            $this->is_ajax = TRUE;
            $this->ajax_func_name = $data['ajax_func_name'];
        }

        if(!empty($this->total_pages) && $this->now_page > $this->total_pages)
        {
            $this->now_page = $this->total_pages;
        }
        $this->first_row = $this->list_rows * ($this->now_page - 1);
    }


    protected function _get_link($page,$text)
    {
        if($this->is_ajax)
        {
            $parameter = '';
            if($this->parameter)
            {
                $parameter = ','.$this->parameter;
            }
            return '<a onclick="' . $this->ajax_func_name . '(\'' . $page . '\''.$parameter.')" href="javascript:void(0)">' . $text . '</a>' . "\n";
        }
        else
        {
            return '<a href="' . $this->_get_url($page) . '">' . $text . '</a>' . "\n";
        }
    }



    protected function _set_url()
    {
        $url = $_SERVER['REQUEST_URI'].(strpos($_SERVER['REQUEST_URI'],'?')?'':"?").$this->parameter;
        $parse = parse_url($url);
        if(isset($parse['query'])) {
            parse_str($parse['query'],$params);
            unset($params[$this->page_name]);
            $url   = $parse['path'].'?'.http_build_query($params);
        }
        if(!empty($params))
        {
            $url .= '&';
        }
        $this->url = $url;
    }


    protected function _get_url($page)
    {
        if($this->url === NULL)
        {
            $this->_set_url();
        }
    // $lable = strpos('&', $this->url) === FALSE ? '' : '&';
        return $this->url . $this->page_name . '=' . $page;
    }



    public function first_page($name = '第一页')
    {
        if($this->now_page > 5)
        {
            return $this->_get_link('1', $name);
        }
        return '';
    }


    public function last_page($name = '最后一页')
    {
        if($this->now_page < $this->total_pages - 5)
        {
            return $this->_get_link($this->total_pages, $name);
        }
        return '';
    }


    public function up_page($name = '上一页')
    {
        if($this->now_page != 1)
        {
            return $this->_get_link($this->now_page - 1, $name);
        }
        return '';
    }


    public function down_page($name = '下一页')
    {
        if($this->now_page < $this->total_pages)
        {
            return $this->_get_link($this->now_page + 1, $name);
        }
        return '';
    }


    public function show($param = 1)
    {
        if($this->total_rows < 1)
        {
            return '';
        }
        switch ($param) {
            case '1' :
                return $this->show_1();
                break;
            case '2' :
                return $this->show_2();
                break;
            case '3' :
                $this->ajax_func_name = empty($this->ajax_func_name) ? 'toPage' : $this->ajax_func_name;
                return $this->show_3();
                break;
        }
    }

    protected function show_2()
    {
        if($this->total_pages != 1)
        {
            $return = '';
            $return .= $this->up_page('<');
            for($i = 1;$i<=$this->total_pages;$i++)
            {
                if($i == $this->now_page)
                {
                    $return .= "<a class='now_page'>$i</a>\n";
                }
                else
                {
                    if($this->now_page-$i>=4 && $i != 1)
                    {
                        $return .="<span class='pageMore'>...</span>\n";
                        $i = $this->now_page-3;
                    }
                    else
                    {
                        if($i >= $this->now_page+5 && $i != $this->total_pages)
                        {
                            $return .="<span>...</span>\n";
                            $i = $this->total_pages;
                        }
                        $return .= $this->_get_link($i, $i) . "\n";
                    }
                }
            }
            $return .= $this->down_page('>');
            return $return;
        }
    }

    protected function show_1()
    {
        $plus = $this->plus;
        if( $plus + $this->now_page > $this->total_pages)
        {
            $begin = $this->total_pages - $plus * 2;
        }else{
            $begin = $this->now_page - $plus;
        }

        $begin = ($begin >= 1) ? $begin : 1;
        $return = '';
        $return .= $this->first_page();
        $return .= $this->up_page();
        for ($i = $begin; $i <= $begin + $plus * 2;$i++)
        {
            if($i>$this->total_pages)
            {
                break;
            }
            if($i == $this->now_page)
            {
                $return .= "<a class='now_page'>$i</a>\n";
            }
            else
            {
                $return .= $this->_get_link($i, $i) . "\n";
            }
        }
        $return .= $this->down_page();
        $return .= $this->last_page();
        return $return;
    }

    protected function show_3()
    {
        $plus = $this->plus;
        if( $plus + $this->now_page > $this->total_pages)
        {
            $begin = $this->total_pages - $plus * 2;
        }else{
            $begin = $this->now_page - $plus;
        }
        $begin = ($begin >= 1) ? $begin : 1;
        $return = '总计 ' .$this->total_rows. ' 个记录分为 ' .$this->total_pages. ' 页, 当前第 ' . $this->now_page . ' 页 ';
        $return .= ',每页 ';
        $return .= '<input type="text" value="'.$this->list_rows.'" id="pageSize" size="3"> ';
        $return .= $this->first_page()."\n";
        $return .= $this->up_page()."\n";
        $return .= $this->down_page()."\n";
        $return .= $this->last_page()."\n";
        $return .= '<select onchange="'.$this->ajax_func_name.'(this.value)" id="gotoPage">';

        for ($i = $begin;$i<=$begin+10;$i++)
        {
            if($i>$this->total_pages)
            {
                break;
            }
            if($i == $this->now_page)
            {
                $return .= '<option selected="true" value="'.$i.'">'.$i.'</option>';
            }
            else
            {
                $return .= '<option value="' .$i. '">' .$i. '</option>';
            }
        }
         $return .= '</select>';
        return $return;
    }
}

[代码] 使用方法

view source

print?
<?php
include 'page.php';

$options = array(
    'total_rows' => '100', //总行数
    'list_rows' => '15', //每页显示量
);


$page = new page($options);

//然后在sql语句里面 limit $page->first_row , $page->list_rows

echo $page->show(1); //ok 打印第一样式

//支持ajax 方法自己探索好了，不想写了~