Detailed explanation of package graphics and text of PHP display page number and paging class

This article mainly introduces in detail the PHP encapsulation of a paging class that displays page numbers. It has a certain reference value. Interested friends can refer to it

The specific content is as follows

1. Code

conn.php

<?php 
 class Mysql{ 
  public function __construct(){ 
   $this->connect(); 
  } 
  public function connect(){ 
   $conn=mysql_pconnect(&#39;localhost&#39;,&#39;root&#39;,&#39;root&#39;) or die("Connect MySQL False"); 
   mysql_select_db(&#39;db_database20&#39;,$conn) or die("Connect DB False"); 
   mysql_query("SET NAMES utf8"); 
  } 
 } 
?>

index.php

<link rel="stylesheet" type="text/css" href="css/style.css" rel="external nofollow" > 
<?php 
 include_once("conn.php");//包含conn.php文件 
 class Page extends Mysql{//创建Page类并继承Mysql类 
  private $pagesize;//每页显示的记录数 
  private $page;//当前是第几页 
  private $pages;//总页数 
  private $total;//查询的总记录数 
  private $pagelen;//显示的页码数 
  private $pageoffset;//页码的偏移量 
  private $table;//欲查询的表名 
  function __construct($pagesize,$pagelen,$table){ 
  if($_GET[&#39;page&#39;]=="" || $_GET[&#39;page&#39;]<0){//判断地址栏参数page是否有值 
   $this->page=1;//当前页定义为1 
  }else{ 
   $this->page=$_GET[&#39;page&#39;];//当前页为地址栏参数的值 
  } 
  $this->pagesize=$pagesize; 
  $this->pagelen=$pagelen; 
  $this->table=$table; 
  new Mysql();//实例化Mysql类 
  $sql=mysql_query("select * from $this->table");//查询表中的记录 
  $this->total=mysql_num_rows($sql);//获得查询的总记录数 
  $this->pages=ceil($this->total/$this->pagesize);//计算总页数 
  $this->pageoffset=($this->pagelen-1)/2;//计算页码偏移量 
  } 
  function sel(){ 
  $sql=mysql_query("select * from $this->table limit ".($this->page-1)*$this->pagesize.",".$this->pagesize);//查询当前页显示的记录 
  return $sql;//返回查询结果 
  } 
  function myPage(){ 
  $message="第".$this->page."页/共".$this->pages."页   ";//输出当前第几页，共几页 
  if($this->page==1){//如果当前页是1 
   $message.="首页 上一页   ";//输出没有链接的文字 
  }else{ 
   $message.="<a href=&#39;".$_SERVER[&#39;PHP_SELF&#39;]."?page=1&#39;>首页</a> ";//输出有链接的文字 
   $message.="<a href=&#39;".$_SERVER[&#39;PHP_SELF&#39;]."?page=".($this->page-1)."&#39;>上一页</a>  ";//输出有链接的文字 
  } 
  if($this->page<=$this->pageoffset){//如果当前页小于页码的偏移量 
   $minpage=1;//显示的最小页数为1 
   $maxpage=$this->pagelen;//显示的最大页数为页码的值 
  }elseif($this->page>$this->pages-$this->pageoffset){//如果当前页大于总页数减去页码的偏移量 
   $minpage=$this->pages-$this->pagelen+1;//显示的最小页数为总页数减去页码数再加上1 
   $maxpage=$this->pages;//显示的最大页数为总页数 
  }else{ 
   $minpage=$this->page-$this->pageoffset;//显示的最小页数为当前页数减去页码的偏移量 
   $maxpage=$this->page+$this->pageoffset;//显示的最大页数为当前页数加上页码的偏移量 
  } 
  for($i=$minpage;$i<=$maxpage;$i++){//循环输出数字页码数 
   if($i==$this->page){ 
   $message.=$i."\n";//输出没有链接的数字 
   }else{ 
   $message.="<a id=&#39;num&#39; href=&#39;".$_SERVER[&#39;PHP_SELF&#39;]."?page=".$i."&#39;>".$i."</a>\n";//输出有链接的数字 
   } 
  } 
  if($this->page==$this->pages){//如果当前页等于最大页数 
   $message.="  下一页 尾页";//显示没有链接的文字 
  }else{ 
   $message.="  <a href=&#39;".$_SERVER[&#39;PHP_SELF&#39;]."?page=".($this->page+1)."&#39;>下一页</a> ";//显示有链接的文字 
   $message.="<a href=&#39;".$_SERVER[&#39;PHP_SELF&#39;]."?page=".$this->pages."&#39;>尾页</a>";//显示有链接的文字 
  } 
  return $message;//返回变量的值 
  } 
 } 
?> 
<table border="1" cellpadding="1" cellspacing="1" bordercolor="#FFFFFF" bgcolor="#FF0000"> 
 <tr> 
 <td style="padding-left:3px; padding-right:3px; padding-top:3px; padding-bottom:3px;" bgcolor="#FFFFFF">ID:</td> 
 <td style="padding-left:3px; padding-right:3px; padding-top:3px; padding-bottom:3px;" bgcolor="#FFFFFF">标题</td> 
 <td style="padding-left:3px; padding-right:3px; padding-top:3px; padding-bottom:3px;" bgcolor="#FFFFFF">内容</td> 
 <td style="padding-left:3px; padding-right:3px; padding-top:3px; padding-bottom:3px;" bgcolor="#FFFFFF">时间</td> 
 </tr> 
<?php 
 $p=new Page(&#39;3&#39;,&#39;3&#39;,&#39;tb_demo01&#39;); 
 $rs=$p->sel(); 
 while($rst=mysql_fetch_row($rs)){ 
?> 
 <tr> 
 <td style="padding-left:3px; padding-right:3px; padding-top:3px; padding-bottom:3px;" bgcolor="#FFFFFF"><?php echo $rst[0] ?></td> 
 <td style="padding-left:3px; padding-right:3px; padding-top:3px; padding-bottom:3px;" bgcolor="#FFFFFF"><?php echo $rst[1] ?></td> 
 <td style="padding-left:3px; padding-right:3px; padding-top:3px; padding-bottom:3px;" bgcolor="#FFFFFF"><?php echo $rst[2] ?></td> 
 <td style="padding-left:3px; padding-right:3px; padding-top:3px; padding-bottom:3px;" bgcolor="#FFFFFF"><?php echo $rst[3] ?></td> 
 </tr> 
<?php }?> 
</table> 
<?php 
 echo $p->myPage(); 
?>

2. Running results

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