php独立分页类

Pagination.php

<?php
/**
 * @Date  :   13-12-5 下午12:46
 * @File  :   Pagination.php
 * @Desc  :
 *  *          独立分页类
 *  *          调用方式：
 *  *          $pagenation = new Pagination( 4, 10, 200 ); // 4(第一个参数) = currentPage, 10(第二个参数) = pageSize, 200(第三个参数) = 总数
 *  *          $pagenation->set_link( 'http://www.exmple.com' );
 *  *          echo $pagenation->create();
 */

class Pagination
{
    protected $_total = 0;
    protected $_total_page = 0;
    protected $_page = 1;
    protected $_page_size = 20;


    public $_link = '';
    public $_grep = 2;
    public $css_next = '';
    public $css_prev = '';
    public $css_curr = '';
    public $css_page = '';

    public function __construct($page, $page_size, $total)
    {
        $this->set_current_page($page);
        $this->set_page_size($page_size);
        $this->set_total($total);
    }

    public function set_link($link)
    {
        $this->_link = $link;
    }

    public function set_page_size($page_size)
    {
        if (empty($page_size)) {
            $this->_page_size = 20;
        } else {
            $this->_page_size = (int)$page_size;
        }
    }

    public function set_total($total)
    {
        $page_size    = empty($this->_page_size) ? 20 : $this->_page_size;
        $this->_total = $total;
        if (0 == ($total % $page_size)) {
            $this->_total_page = intval($total / $page_size);
        } else {
            $this->_total_page = intval($total / $page_size) + 1;
        }
        if ($this->_page > $this->_total_page) {
            $this->_page = $this->_total_page;
        }
    }

    public function set_current_page($page)
    {
        if (empty($page)) {
            $this->_page = 1;
        } else {
            $this->_page = (int)$page;
        }
    }

    public function get_next_page_btn()
    {
        if ($this->_page < $this->_total_page) {
            $link = sprintf($this->_link, ($this->_page + 1));

            return sprintf($this->css_next, $link);
        }

        return '';
    }

    public function get_prev_page_btn()
    {
        if ($this->_page > 1) {
            $link = sprintf($this->_link, ($this->_page - 1));

            return sprintf($this->css_prev, $link);
        }

        return '';
    }

    public function get_current_page()
    {
        return sprintf($this->css_curr, $this->_page);
    }

    public function get_page_link($page)
    {
        $link = '';
        $link = sprintf($this->_link, $page);

        $link = sprintf($this->css_page, $link, $page);

        return $link;
    }

    public function get_prev_pages()
    {
        $pages = array();
        $begin = $this->_page - $this->_grep;

        if ($begin < 1) {
            $begin = 1;
        } elseif ($begin > 2) {
            $pages[] = $this->get_page_link(1);
        } elseif ($begin == 2) {
            $pages[] = $this->get_page_link(1);
        }
        for ($i = $begin; $i < $this->_page; $i++) {
            $pages[] = $this->get_page_link($i);
        }

        return $pages;
    }

    public function get_next_pages()
    {
        $pages = array();
        $begin = $this->_page + 1;
        if ($begin < $this->_total_page) {
            $end = $begin + $this->_grep;
            if ($end > $this->_total_page) {
                $end = $this->_total_page;
            }
            for ($i = $begin; $i < $end; $i++) {
                $pages[] = $this->get_page_link($i);
            }
            if ($i < $this->_total_page) {
                $pages[] = $this->get_page_link($this->_total_page);
            } else {
                $pages[] = $this->get_page_link($this->_total_page);
            }
        } elseif ($begin == $this->_total_page) {
            $pages[] = $this->get_page_link($this->_total_page);
        }

        return $pages;
    }

    public function create()
    {
        $str = '';

        if ($this->_total_page <= 1) {
            return $str;
        }

//        $str .= '<div class="paging">';
        $str .= $this->get_prev_page_btn();

        $prev_pages = $this->get_prev_pages();

        if (!empty($prev_pages)) {
            foreach ($prev_pages as $page) {
                $str .= $page;
            }
        }
        $str .= $this->get_current_page();
        $next_pages = $this->get_next_pages();
        if (!empty($next_pages)) {
            foreach ($next_pages as $page) {
                $str .= $page;
            }
        }
        $str .= $this->get_next_page_btn();
//        $str .= "第{$this->_page}/{$this->_total_page}页，共{$this->_total}条";
//        $str .= '</div>';

        return $str;
    }
}