一个php作的文本留言本的例子(一)_php基础

大家知道,数据库对于网络来说的重要性.由于cgi的复杂,现在asp和php+mysql已经成为主流.几乎所有的个人网页都要用到留言本,可是申请的留言本很不稳定.这为网上的交流带来了诸多不便.所以,希望拥有自己的留言本的朋友越来越多.
但是,免费的个人主页支持asp和php的很少.笔者现在向您推荐奥索网,(http://www.oso.com.cn)支持php.这样您便有了能够拥有自己留言本的基础.现在,我就通过一个文本留言本的例子来讲述php的简单使用.
首先,我们先确定,留言的几个过程:写留言,发送,查看.(搜索)等等.而且对于斑竹来说,管理留言本又是不可或缺的.这样我们就不妨定位于6个php文件,1个文本文件.6个php文件分别为:guest.php manage.php reply.php sys.php del.php edit.php,1个文本文件为:guest.txt
先来看看guest.php的内容,你当然可以直接将下面的内容放到您的php网页里,请尊重作者的劳动,谢谢.
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//guest.php:<?

require("sys.php");
if ($B1)
{
if ($message=="" or $name=="")
{
$errorm="<font color=red>出错了!!!</font>姓名和留言内容必填";
}
else
{
#写入数据
$space = " ";
$time = date(Y年m月d日H小时i分);
$ip=$REMOTE_ADDR;
$name=encode($name);
$homepage=encode($homepage);
$from=encode($from);
$email=encode($email);
$message=StripSlashes($message);
$message=htmlspecialchars($message);
$message=check_strlen_long($message);
$message=nl2br($message);
$guestcontent = "<tr><td><font color=#AB00E1>留言内容:</font><br>
</style>
<body bgcolor=#FFFFFD background="bg.jpg">
<p align="center">
<? include('head.htm');?>
<table width="68%" border="1" cellpadding="3" cellspacing="0" bordercolor="#E3E3E3">
<form method="POST" action="guest.php">
<?
if ($errorm)
{
echo "<tr>";
echo "<td colspan=3 height=32> ";
echo "$errorm";
echo "</td>";
echo "</tr>";
}
?>
<tr>
<td width="22%" bgcolor="#F0F0F0"><font color="#000000">姓名<font color="#FF0033">(必填)</font></font></td>
<td colspan="2" width="78%" bgcolor="#F0F0F0"><font color="#00FF00">
<input type="text" name="name" size="40">
</font></td>
</tr>
<tr>
<td width="22%" height="29">主页:</td>
<td colspan="2" height="29" width="78%">
<input type="text" name="homepage" size="40" value="http://">
</td>
</tr>
<tr>
<td width="22%" height="27" bgcolor="#F0F0F0">来自:</td>
<td colspan="2" height="27" width="78%" bgcolor="#F0F0F0">
<input type="text" name="from" size="40">
</td>
</tr>
<tr>
<td width="22%" height="20">Email:</td>
<td colspan="2" height="20" width="78%"><font color="#00FF00">
<input type="text" name="email" size="40">
</font></td>
</tr>
<tr>
<td colspan="3" valign="middle" align="left">
<p align="center"><font color="#000000">请留言</font><font color="#FF0033">(必填)</font><font color="#00FF00"><br>
<textarea rows="6" name="message" cols="55" wrap="VIRTUAL"></textarea>
</font></p>
</td>
</tr>
<tr bgcolor="#F0F0F0">
<td colspan="3" height="24">
<p align="center"><font color="#00FF00">
<input type="submit" value="发送" name="B1">

<input type="reset" value="重写" name="B2">
</font></p>
</td>
</tr>
</form>
</table>
<table width="68%" border="1" cellpadding="4" cellspacing="0" bordercolor="#E3E3E3">
<tr>
<td>
<table width="100%" border="0" cellpadding="0" cellspacing="0">
<form action=manage.php method=post>
<tr>
<td colspan="2">
<input type=hidden name=dispflag value=show>
管理密码:
<input type=password name=password size=8>

<input type=submit value="确定" name="submit">
</td>
</tr>
</form>
</table>
</td>
<td>
<table width="100%" border="0" cellpadding="0" cellspacing="0">
<form action=guest.php method=post>
<tr>
<td> 请输入关键字:
<input type="text" name="keyword" size="10">
<input type="submit" name="search" value="搜索留言">
</td>
</tr>
</form>
</table>
</td>
</tr>
</table>
<?
function search($keyword)
{
global $content;
$count=count($content);
$subscript=0;
$ArrSearch=array();
for ($i=0;$i<$count;$i++)
{
if (ereg($keyword,$content[$i]))
{
$ArrSearch[$subscript]=ereg_replace($keyword,"<font color=red>$keyword</font>",$content[$i]);
$subscript++;
}
}
return $ArrSearch;
}//end function
$one_page_line=15;
$content = file($guestfile);
if (isset($search) and isset($keyword) and $keyword!="")
{
$content=search($keyword);
}
$count =count($content);
?>
<table width="68%" border="0">
<tr>
<td>

<?
$int_page_count=$count;//总条数;
$int_page_num=ceil($int_page_count/$one_page_line);//总页数;
echo "<font color=#CC33FF>分页:";
for ($i=1;$i<=$int_page_num;$i++)
{
echo "<a href=guest.php?page=$i>".$i."</a> ";
}
echo "</font>";
if (isset($search) and isset($keyword) and $keyword!="")
{
echo "<br><center>";
echo "下面的留言中包含关键字<font color=red>$keyword</font>共<font color=red>".$count."</font>条</center>";
}
?>
</td><td><p align=right>共有<font color=red><?echo "$count"?></font>条</p></td>
</tr>
</table>
</p>
<br>
<table width="68%" border="0" align="center">
<?
if ($page=="" or !isset($page))
{$page=1;}
$text="";
$begin_line=$int_page_count-($page-1)*$one_page_line;
if ($begin_line<$one_page_line){$one_page_line=$begin_line;}
for ($j=$begin_line;$j>($begin_line-$one_page_line);$j--)
{
$text=$text."<tr><td align=right colspan=2><a href=reply.php?job=reply&record=".$j.">回复</a> <a href=edit.php?record=".$j.">编辑</a> <a href=dele.php?record=".$j.">删除</a> 第<font color=red>$j</font>条</td></tr>";
$text.=$content[$j-1];

//数组找下标从0开始.
}

echo "$text";
?>
</table>
<?
include('bottom.htm');
?>
</body>
</html>
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未完待续...