PHP分页类代码,php分页代码
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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