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php实现面向对象的数据分页显示

2017-11-22 10:55 495 查看
一 代码

<?php
class page
{
private $pagesize;
private $page;
private $pagecount;
private $total;
private $conn;

public function __construct($pagesize,$page)
{
$this->pagesize=$pagesize;
$this->page=$page;

}

public function listInfo()
{
if($this->page=="" || !is_numeric($this->page))
{
$this->page=1;
}

$this->conn=mysql_connect("localhost","root","root");
mysql_select_db("db_database20",$this->conn);
mysql_query("set names gb2312");
$sql=mysql_query("select count(*) as total from tb_student",$this->conn);
$info=mysql_fetch_array($sql);
$this->total=$info[total];
if($this->total==0)
{

echo "<table width=704 height=20 border=0 align=center cellpadding=0 cellspacing=0>"+
"<tr>"+
"<td><div align=center>暂无学生信息！</div></td>"+
"</tr>"+
"</table>";

}
else
{
if(($this->total % $this->pagesize)==0)
{
$this->pagecount=intval($this->total/$this->pagesize);

}
else
{
if($this->total<=$this->pagesize)
{
$this->pagecount=1;
}
else
{
$this->pagecount=ceil($this->total/$this->pagesize);
}

}

$sql=mysql_query("select * from tb_student order by sno desc limit ".$this->pagesize*($this->page-1).",$this->pagesize",$this->conn);

?>

<table width="703" border="0" align="center" cellpadding="0" cellspacing="1" bgcolor="#476106">
<tr>
<td width="100" height="20" bgcolor="#C2C41F"><div align="center">学号</div></td>
<td width="100" bgcolor="#C2C41F"><div align="center">姓名</div></td>
<td width="100" bgcolor="#C2C41F"><div align="center">性别</div></td>
<td width="100" bgcolor="#C2C41F"><div align="center">班级</div></td>
<td width="297" bgcolor="#C2C41F"><div align="center">住址</div></td>
</tr>

<?php

while($info=mysql_fetch_array($sql))
{
?>
<tr>
<td height="20" bgcolor="#FFFFFF"><div align="center"><?php echo $info[sno];?></div></td>
<td height="20" bgcolor="#FFFFFF"><div align="center"><?php echo $info[sname];?></div></td>
<td height="20" bgcolor="#FFFFFF"><div align="center"><?php echo $info[ssex];?></div></td>
<td height="20" bgcolor="#FFFFFF"><div align="center"><?php echo $info[sclass];?></div></td>
<td height="20" bgcolor="#FFFFFF"><div align="center"><?php echo $info[saddress];?></div></td>
</tr>
<?php
}
echo "</table>";
}

}

public function toPage()
{
?>
<table width="704" height="20" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td width="342"> 共有学生信息 <?php echo $this->total;?> 条 每页显示 <?php echo $this->pagesize;?> 条 第 <?php echo $this->page;?> 页/共 <?php echo $this->pagecount;?> 页</td>
<td width="362"><div align="right">
<a href="<?php echo $_SERVER["PHP_SELF"]?>?page=1">首页</a>
<a href="<?php echo $_SERVER["PHP_SELF"]?>?page=<?php
if($this->page>1)
echo $this->page-1;
else
echo 1;
?>">上一页</a>
<a href="<?php echo $_SERVER["PHP_SELF"]?>?page=<?php
if($this->page<$this->pagecount-1)
echo $this->page+1;
else
echo $this->pagecount;
?>">下一页</a>
<a href="<?php echo $_SERVER["PHP_SELF"]?>?page=<?php echo $this->pagecount;?>">尾页</a>

</div></td>
</tr>
</table>

<?php
}

public function __destruct()
{
mysql_close($this->conn);
}
}
$obj=new page(4,$_GET["page"]);
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>面向对象分页功能</title>
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body topmargin="0" bottommargin="0" leftmargin="0">
<table width="200" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td><img src="images/banner.JPG" width="703" height="234"></td>
</tr>
</table><br>
<?php
$obj->listInfo();
$obj->toPage();
?>
<table width="704" height="20" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td><div align="center">版权所有©吉林省明日科技有限公司 <br>网址：<a href="http://www.mingrisoft.com">http://www.mingrisoft.com</a></div></td>
</tr>
</table>
</body>
</html>

 

二 运行结果



 





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