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php基于SQLite实现的分页功能示例

更新时间:2020-03-21 08:25:38 作者:startmvc
本文实例讲述了php基于SQLite实现的分页功能。分享给大家供大家参考,具体如下:这里操作

本文实例讲述了php基于SQLite实现的分页功能。分享给大家供大家参考,具体如下:

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【包含增删改查及事务等操作】》中的SQLite数据库操作类。废话不说,直接上代码:


<meta charset='utf-8'>
<?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();
?>

php SQLite 分页