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PHP练习之实现分页

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Lepaskan： 2023-03-24 20:08:02

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这篇文章主要介绍了关于PHP练习之实现分页，有着一定的参考价值，现在分享给大家，有需要的朋友可以参考一下

创建表语句

CREATE TABLE `guestbook` (
  `id` mediumint(8) unsigned NOT NULL auto_increment,  
  `nickname` char(15) NOT NULL default &#39;&#39;,  
  `email` varchar(100) NOT NULL default &#39;&#39;,  
  `content` text NOT NULL,  
  `createtime` int(10) unsigned NOT NULL default &#39;0&#39;,  
PRIMARY KEY  (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;

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插入数据

insert into guestbook (`id`,`nickname`,`email`,`content`,`createtime`) values(&#39;1&#39;,  &#39;admin&#39;,    &#39;admin@5idev.com&#39;,  &#39;留言测试&#39;, &#39;1264167501&#39;);
insert into guestbook (`id`,`nickname`,`email`,`content`,`createtime`) values(&#39;2&#39;,  &#39;user&#39;, &#39;user@163.com&#39;, &#39;大家好&#39;,  &#39;1264168127&#39;);
insert into guestbook (`id`,`nickname`,`email`,`content`,`createtime`) values(&#39;3&#39;,  &#39;小明&#39;,   &#39;xiaoming@163.com&#39;, &#39;做得好，继续努力。。&#39;,   &#39;1264168865&#39;);
insert into guestbook (`id`,`nickname`,`email`,`content`,`createtime`) values(&#39;4&#39;,  &#39;小张&#39;,   &#39;xiaozhang@163.com&#39;,    &#39;来看看&#39;,  &#39;1264169118&#39;);
insert into guestbook (`id`,`nickname`,`email`,`content`,`createtime`) values(&#39;5&#39;,  &#39;小丽&#39;,   &#39;xiaoli@tom.com&#39;,   &#39;haha&#39;, &#39;1283276566&#39;);
insert into guestbook (`id`,`nickname`,`email`,`content`,`createtime`) values(&#39;6&#39;,  &#39;Tom&#39;,  &#39;tom@gmail.com&#39;,    &#39;Hello&#39;,    &#39;1283336218&#39;);
insert into guestbook (`id`,`nickname`,`email`,`content`,`createtime`) values(&#39;7&#39;,  &#39;Jack&#39;, &#39;jack@hotmail.com&#39;, &#39;okok&#39;, &#39;1283336315&#39;);
insert into guestbook (`id`,`nickname`,`email`,`content`,`createtime`) values(&#39;8&#39;,  &#39;admin&#39;,    &#39;admin@5idev.com&#39;,  &#39;嗯嗯&#39;,   &#39;1283336315&#39;);
insert into guestbook (`id`,`nickname`,`email`,`content`,`createtime`) values(&#39;9&#39;,  &#39;阿里巴巴&#39;, &#39;alibaba@5idev.com&#39;,    &#39;来看看&#39;,  &#39;1283337158&#39;);
insert into guestbook (`id`,`nickname`,`email`,`content`,`createtime`) values(&#39;10&#39;, &#39;路人甲&#39;,  &#39;haha@163.com&#39;, &#39;哈哈哈&#39;,  &#39;1283338228&#39;);

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源代码

<?php
    $host = &#39;localhost&#39;;    
    $username = &#39;root&#39;;    
    $password = &#39;&#39;;    
    $dbname = &#39;test&#39;;    
    $port = &#39;&#39;;    
    $link = new mysqli($host,$username,$password,$dbname);    
    if($link->connect_error){        
    die(&#39;Connect Error(&#39;.$linlk->connect_erron.&#39;)&#39;.$link->connect_error);
    }    
    $link->set_charset("utf8");    //每页显示的留言数
    $pageSize = 4;    //确定当前页数$p 参数
    $p = isset($_GET[&#39;p&#39;]) ? $_GET[&#39;p&#39;] : 1;    //数据指针
    $offset = ($p-1)*$pageSize;    //查询本页显示的数据
    $query_sql = "select * from guestbook order by id desc limit $offset,$pageSize";    // echo $query_sql;
    $result = $link->query($query_sql);    
    if($result){          
    while($gblist = $result->fetch_array(MYSQLI_ASSOC)){            
    echo &#39;<a href="&#39;,$gblist[&#39;nickname&#39;],&#39;">&#39;,$gblist[&#39;nickname&#39;],&#39;</a> &#39;;            
    echo &#39;发表于：&#39;,date("Y-m-d H:i", $gblist[&#39;createtime&#39;]),&#39;<br />&#39;;            
    echo &#39;内容：&#39;,$gblist[&#39;content&#39;],&#39;<br /><hr />&#39;;
          }
    }    //分页格式
    $count_sql = "select count(*) as count from guestbook";    
    $count_result = $link->query($count_sql);    
    $count_array = $count_result->fetch_assoc();    
    $count = $count_array[&#39;count&#39;];    //计算总的页数
    $pagenum = ceil($count/$pageSize);    
    echo &#39;共&#39;,$count,&#39;条留言&#39;;    //循环输出各页数目及连接
    if($pagenum > 1){        
    for($i=1;$i<=$pagenum;$i++){            
    if($i == $p){                
    echo "[$i]";
            }else{                
            echo "[<a href=&#39;oPagenate.php?p=$i"."&#39;>$i</a>]";
            }
        }
    }

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