PHP+MySQL使用mysql_num_rows实现模糊查询图书信息功能

td{
 font-size:9pt;
}
.style2 {color: #FFFFFF}

!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
html>
head>
meta http-equiv="Content-Type" content="text/html; charset=gb2312">
link href="style.css" rel="external nofollow" rel="stylesheet">
title>应用mysql_num_rows()函数获取查询结果集中的记录数/title>
/head>
body>
table width="609" height="134" border="1" cellpadding="0" cellspacing="0" bgcolor="#9E7DB4" align="center">
form name="myform" method="post" action="">
  tr>
   td width="605" height="51" bgcolor="#CC99FF">div align="center">请输入图书名称
     input name="txt_book" type="text" id="txt_book" size="25" >
     nbsp;
     input type="submit" name="Submit" value="查询">
   /div>/td>
 /tr>
/form>
 tr valign="top" bgcolor="#FFFFFF">
  td height="81">
   table width="100%" border="0" cellpadding="0" cellspacing="0">
    tr>
     td height="79" align="right" valign="top"> br>
       table width="572" border="0" align="center" cellpadding="0" cellspacing="1" bgcolor="#625D59">
        tr align="center" bgcolor="#CC99FF">
         td width="46" height="20">编号/td>
         td width="167">图书名称/td>
         td width="90">出版时间/td>
         td width="70">图书定价/td>
         td width="78">作者/td>
         td width="114">出版社/td>
        /tr>
        ?php
        $link=mysql_connect("localhost","root","root") or die("数据库连接失败".mysql_error());
        mysql_select_db("db_database13",$link);
        mysql_query("set names gb2312");
        $sql=mysql_query("select * from tb_book");
        $info=mysql_fetch_object($sql);
        if ($_POST[Submit]=="查询"){
          $txt_book=$_POST[txt_book];
          $sql=mysql_query("select * from tb_book where bookname like '%".trim($txt_book)."%'"); //如果选择的条件为"like",则进行模糊查询
          $info=mysql_fetch_object($sql);
        }
        if($info==false){ //如果检索的信息不存在，则输出相应的提示信息
          echo "div align='center' style='color:#FF0000; font-size:12px'>对不起，您检索的图书信息不存在!/div>";
        }
        do{
       ?>
        tr align="left" bgcolor="#FFFFFF">
         td height="20" align="center">?php echo $info->id; ?>/td>
         td >nbsp;?php echo $info->bookname; ?>/td>
         td align="center">?php echo $info->issuDate; ?>/td>
         td align="center">?php echo $info->price; ?>/td>
         td align="center">nbsp;?php echo $info->maker; ?>/td>
         td>nbsp;?php echo $info->publisher; ?>/td>
        /tr>
        ?php
        }while($info=mysql_fetch_object($sql));
        ?>
      /table>
      br>
      nbsp;nbsp;nbsp;nbsp;nbsp;nbsp;nbsp;找到相关记录nbsp;?php $nums=mysql_num_rows($sql);echo $nums;?>nbsp;条nbsp;nbsp;nbsp;nbsp;/td>
    /tr>
   /table>
  br>/td>
 /tr>
/table>
/body>
/html>