php基于SQLite实现的分页功能。

这里操作数据库文件使用的是前面文章《PHP基于PDO实现的SQLite操作类》中的SQLite数据库操作类。

代码:

<?php
class SqlitePage{
public function __construct()
{
$this->table_name='';
$this->tj='';
$this->page_size='';
$this->current_page='';
$this->total_page='';
include_once 'sqlite_db.php';
$this->db=new SqliteDB();//可以调用他的操作方法了
}
function entrance($table_name,$page_size,$tj='')//sql中不包含limit page_size为每页显示条数
{
// 首先获取当前页
// sql = "select * from tab where "+条件+" order by "+排序+" limit "+要显示多少条记录+" offset "+跳过多少条记录;
$this->page_size=$page_size;
$this->table_name=$table_name;
$this->tj=$tj;
$this->total_page=ceil($this->db->total($this->table_name,$this->tj)/$this->page_size);
if (!isset($_GET['page'])) {
$this->current_page=1;//如果没有page,则设置为默认第一页
}
else{
$this->current_page=$_GET['page'];
}
if ($this->current_page>$this->total_page) {//当当前页数目大于总页数,则设置当前页数为总页数
$this->current_page=$this->total_page;
}
if ($this->current_page<1) {//当当前页数目大于总页数,则设置当前页数为总页数
$this->current_page=1;
}
$tj=$this->tj.' limit '.$this->page_size.' offset '.($this->current_page-1)*$this->page_size;
$result=$this->db->query($this->table_name,$tj);
return $result;
}
function page_bar()
{
$old_url = $_SERVER["REQUEST_URI"];
$check = strpos($old_url, '?');
$pre_urls='test';
if ($check) {//如果urls中有?
if(substr($old_url, $check+1) == '')
{ //有问号,但是后面没有跟任何参数
$first_urls=$old_url.'page=1';//首页
$pre_urls=$old_url.'page='.($this->current_page-1);//上一页;
$next_urls=$old_url.'page='.($this->current_page+1);//下一页;
$end_urls=$old_url.'page='.$this->total_page;//末页
}
else {//有问号,并且有参数
if (isset($_GET['page'])) {//如果参数中包含page参数,则注销这个参数
unset($_GET['page']);
$old_url='http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'?'.http_build_query($_GET);
}
$first_urls=$old_url.'&page=1';//首页
$pre_urls=$old_url.'&page='.($this->current_page-1);//上一页;
$next_urls=$old_url.'&page='.($this->current_page+1);//下一页;
$end_urls=$old_url.'&page='.$this->total_page;//末页
}
}
else{// 如果没有问号(也就是说后面没有任何参数,则直接跟)
$first_urls=$old_url.'?page=1';
$first_urls=$old_url.'?page=1';//首页
$pre_urls=$old_url.'?page='.($this->current_page-1);//上一页;
$next_urls=$old_url.'?page='.($this->current_page+1);//下一页;
$end_urls=$old_url.'?page='.$this->total_page;//末页
}
// echo $this->table_name.'table_name';
return '
<div class="page">
<a>【共'.$this->total_page.'页,第'.$this->current_page.'页】</a>
<a href="'.$first_urls.'" rel="external nofollow" >首页</a>
<a href="'.$pre_urls.'" rel="external nofollow" >上一页</a>
<a href="'.$next_urls.'" rel="external nofollow" >下一页</a>
<a href="'.$end_urls.'" rel="external nofollow" >末页</a>
</div>
';
}
public function get_total_page()
{
return ceil($this->total_record/$this->page_size);
}
}
// $page=new PrePage();
// $res=$page->entrance('log',10);
// echo "<hr />";
// foreach ($res as $key => $row) {
// echo $row['urls'].'<br />';
// }
// echo $page->page_bar();
?>
05-11 20:50