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PHP分页类代码,php分页代码
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PHP分页类代码,php分页代码

Jun 13, 2016 am 09:03 AM
php

PHP分页类代码,php分页代码

今天为大家献上一段代码,这是一段php分页代码:

//创建分页类
class Page {
    private $_all_num;                                                            //数据总个数
    private $_page_size;                                                        //每页显示几条数据
    private $_page;                                                                //当前页面
    private $_all_page;                                                            //总页码
    private $_url;                                                                //页面地址
    private $_limit;                                                            //数据库查询语句
    private $_sign;                                                                //地址符号
    
    //拦截器
    public function __get($_key) {
        return $this->$_key;
    }
    
    public function __construct($_all_num,$_page_size) {
        $this->_all_num = $_all_num;
        $this->_page_size = $_page_size;
        $this->_all_page = ceil($this->_all_num / $this->_page_size);
        $this->_page = $this->setPage();
        $this->_url = $this->setUrl();
        $this->_limit = 'LIMIT '.($this->_page * $this->_page_size - $this->_page_size).','.$this->_page_size;
    }
    
    //获取当前页码
    private function setPage() {
        if (!empty($_GET['page']) && $_GET['page'] > 0) {
            if ($_GET['page'] _all_page) {
                return ceil($_GET['page']);
            } else {
                return $this->_all_page;
            }
        } else {
            return 1;
        }
    }
    
    //获取地址
    private function setUrl() {
        $_url = $_SERVER['REQUEST_URI'];    
        if (!empty($_url)) {
            $_par_url = parse_url($_url);
            if (isset($_par_url['query'])) {
                parse_str($_par_url['query'],$_arr);
                if (isset($_arr['page'])) {
                    unset($_arr['page']);
                }
                if (!empty($_arr)) {
                    $_http = http_build_query($_arr);
                    $_end_url = $_par_url['path'] . '?' . $_http;
                    $this->_sign = '&';
                } else {
                    $_end_url = $_par_url['path'];
                    $this->_sign = '?';
                }
            } else {
                $_end_url = $_par_url['path'];
                $this->_sign = '?';
            }
        }
        return $_end_url;
    }
    
    //显示分页
    public function numPage() {
        $_num = '';
        //前面
        for ($i=1; $i_page; $i++) {
            if ($i            $_num .= "".$i."";
        }
        //自己
        $_num .= "".$this->_page."";
        //后面
        for ($i=$this->_page+1; $i_all_page; $i++) {
            if ($i>$this->_all_page) continue;
            $_num .= "".$i."";
        }
        return $_num;
    }
}
?>

大家可以将上面一段代码复制到文本编辑器中这样看的会舒服一点!下面讲一下具体步骤:

1、创建一个分页类:class Page {};
2、获取需要显示数据的个数,并且记录在Page类中,这里数据的个数通过数据去获取就不详细说了!然后设置每页显示数据的条数!
3、获取当前页面地址!
    这段代码大概意思就是当你的地址跟着?时,那么点击分页就用&page=;当你的地址后面没有后缀或者只有?page=,那么点击分页就用?page=

4、获取当前页码
    这里的页码必须是整数,所以可以用ceil这个函数,还要注意用户的恶意修改地址!

4、做分页元素,这里只是做一个简单的数字分页,更复杂用户体验更好的,大家可以自行扩展!

5、设置数据库库的查询条数,也就是LIMIT;举个例子:比如我现在有10条数据,设置每页显示5条数据,那么
    当用户点击第一页时,LIMIT 0,5
    当用户点击第二页时,LIMIT 5,5
6、这段代码的调用:
    $_page = new Page(10,5);
    $_page->page();
    上面的10是总的数据个数,5是你想要每页显示数据的个数,$_page->page()就是页面的分页,直接echo出来就行啦,注意你还得将Page类中的$_limit调用出来放到数据库查询语句中,这样基本的php分页就出来啦!

此文章属于王业楼的个人博客原创,若要转载请注明出处:王业楼的个人博客 www.ly89.cn

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