php开发_多关键字，高亮显示，php高亮显示

1 <?php
2 $conn = @ mysql_connect("localhost", "root", "") or die("数据库链接错误");
3 mysql_select_db("form", $conn);
4 mysql_query("set names 'gbk'"); 
5 ?>

 1 <?php
 2 include 'conn.php';
 3 ?>
 4 
 5 <table width=500 align="center">
 6     <form action="" method="get">
 7     <tr>
 8         <td>关键字：<input type="text" name="keyWord" />
 9         <input type="submit" value="搜索" /></td>
10     </tr>
11     </form>
12 </table>
13 
14 <table width=500 border="0" align="center" cellpadding="5"
15     cellspacing="1" bgcolor="#add3ef">
16     <?php
17     //关键字不为空的时候才执行相关搜索
18     if($_GET['keyWord']){
19     //用空格符把关键字分割开
20     $key=explode(' ', $_GET[keyWord]);
21     $sql="select * from message where title like '$key[0]' or title like '$key[1]' or content like '$key[0]' or content like '%$key[1]%'";
22     $query=mysql_query($sql);
23     while ($row=mysql_fetch_array($query)){
24         //替换关键字，并且把关键字高亮显示
25         $row[title]=preg_replace("/$key[0]/i", "<font color=red><b>$key[0]</b></font>", $row[title]);
26         $row[title]=preg_replace("/$key[0]/i", "<font color=red><b>$key[1]</b></font>", $row[title]);
27         $row[content]=preg_replace("/$key[0]/i", "<font color=red><b>$key[0]</b></font>", $row[content]);
28         $row[content]=preg_replace("/$key[1]/i", "<font color=red><b>$key[1]</b></font>", $row[content]);
29         ?>
30 
31     <tr bgcolor="#eff3ff">
32         <td>标题：<font color="black"><?=$row[title]?></font> 用户：<font color="black"><?=$row[user] ?></font>
33         <div align="right"><a href="preEdit.php?id=<?=$row[id]?>">编辑</a>  |  <a
34             href="delete.php?id=<?=$row[id]?>">删除</a></div>
35         </td>
36     </tr>
37     <tr bgColor="#ffffff">
38         <td>内容：<?=$row[content]?></td>
39     </tr>
40     <tr bgColor="#ffffff">
41         <td>
42         <div align="right">发表日期：<?=$row[lastdate]?></div>
43         </td>
44     </tr>
45     <?php }
46     }
47     ?>
48 </table>

1 //用空格符把关键字分割开
2 $key=explode(' ', $_GET[keyWord]);