这个变量是怎么来的-PHP Tutorial-php.cn

这个变量是怎么来的

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Release： 2016-06-23 13:44:50

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下面这段代码中 if(isset($_GET['n_page'])){ //判断当前页码
的 n_page是从哪来的，我查了一下不是数据表中的字段，它到底是怎么来的，难道是随便定义的一个玩意吗

<?phpsession_start();include_once("conn/conn.php");?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><link href="css/viewmeeting.css" type="text/css" rel="stylesheet" /><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><title>无标题文档</title></head><body><h3>会议信息浏览</h3><?php$sqlview="select * from tb_meeting_info";$num=2;                                                 //每页显示最大记录数  if(isset($_GET['n_page'])){	                        //判断当前页码   $c_page = $_GET['n_page'];					            //将$n_page赋给变量$c_apge  }else{		$c_page = 1;								    //初始化变量$c_page	    } $l_rst = $conn -> PageExecute($sqlview,$num,$c_page);	//执行pageExecute函数$rst_view = $conn->execute($sqlview);$record=count($rst_view->GetRows());                    //获取总记录数if($record==0){echo "<span class=\"norecord\">当前没有任何记录</span>";}else{?><table width="728" border="0" cellspacing="0" cellpadding="0" bordercolor="#66CC00">  <tr class="tableheader">    <td width="55" align="center" height="25">会议编号</td>    <td width="60" align="center">会议名称</td>    <td width="60" align="center">部门名称</td>    <td width="80" align="center">会议地点</td>    <td width="80" align="center">会议日期</td>    <td width="45" align="center">主持人</td>    <td width="60" align="center">出席人员</td>    <td width="45" align="center">记录人</td>    <td width="120" align="center">会议摘要</td>	<td width="60" align="center">查看详情</td>  </tr><?phpwhile(!$l_rst->EOF){?>  <tr>    <td height="30"><?php echo $l_rst->fields[0]; ?></td>    <td height="30"><?php echo $l_rst->fields[1]; ?></td>    <td height="30"><?php echo $l_rst->fields[2]; ?></td>    <td height="30"><?php echo $l_rst->fields[3]; ?></td>    <td height="30"><?php echo $l_rst->fields[4]; ?></td>    <td height="30"><?php echo $l_rst->fields[5]; ?></td>    <td height="30"><?php echo $l_rst->fields[6]; ?></td>    <td height="30"><?php echo $l_rst->fields[7]; ?></td>    <td height="30"><?php echo $l_rst->fields[8]; ?></td>	<td height="30" align="center"><a href="#" onclick="javascript:Wopen=open('showinfo.php?id=<?php echo $l_rst->fields[0]; ?>','','height=720,width=1004,scrollbars=no');"><img src="images/xiazai.gif" width="26"    style="max-width:90%" border="0" alt="详情"></a></td>  </tr><?php   $l_rst->movenext();   } ?></table><div class="sepa_page"><table>  <tr>    <td>  <font color='#999999'>当前是第<?php echo $l_rst -> absolutePage(); ?>页/一共<?php echo $l_rst -> LastPageNo(); ?>页</font><?php		if(!$l_rst -> AtfirstPage()){					//如果当前页不是首页?><!--  输出向上翻页超链接  -->		<a href ="<?php echo "?lmbs=$_GET[lmbs]&n_page=1" ?>"> 首页 </a>		<a href ="<?php echo "?lmbs=$_GET[lmbs]&n_page=".($l_rst -> absolutePage() - 1); ?>"> 上一页 </a><!--  ----------------------------  --><?php		}		if(!$l_rst -> AtlastPage()){					//如果当前页不是尾页?><!--  输出向下翻页超链接  -->		<a href = "<?php echo "?lmbs=$_GET[lmbs]&n_page=".($l_rst -> absolutePage() + 1); ?>"> 下一页 </a>		<a href ="<?php echo "?lmbs=$_GET[lmbs]&n_page=".($l_rst -> LastPageNo());?>"> 尾页 </a>	<!--  -----------------------------  --><?php		}?><?php}?>      </td>	  <td width="100" align="right"><span style="color:#FF0000">点此导出报表>>></span></td>	  <td width="60">		   <a href="createform.php"><img  align="bottom"src="images/out_15.jpg"    style="max-width:90%"  style="max-width:90%" border="0" / alt="这个变量是怎么来的" ></a>		</td>	 </tr>  </table></div></body></html>

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