PHP＋TEXT留言本(二)

上一次我們研究了guest.php文件.具體的問題還要求讀者朋友自己深入的去實踐,而且需要一些工具書來學習,如果您一點php的知識都沒有,筆者奉勸您就不要想下看了,筆者沒有太多的時間和篇幅去逐句探究一個php文件的用途和意義.好的,接下來我們來作edit.php這個文件.

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//edit.php

if ($Submit)

{

if ($SavePassword=="on")

{setcookie("TxtPassword","$TxtPassword",time()+30*24*3600);}

else

{setcookie("TxtPassword");}

}

<html>

Td {FONT-SIZE: 10pt;}

TEXTAREA

{

FONT-FAMILY: "宋體";

FONT-SIZE: 10pt;

}

</style>

<head>

require("sys.php");

function readvalue($tags,$tage)

{

global $message,$long,$reply;

$StrStart=strlen(strstr($message,$tags))-strlen($tags);//去除標記後變量所在字串的起始位置.

$StrEnd=strlen(strstr($message,$tage));

$len=$StrStart-$StrEnd;

$StrStart=$long-$StrStart;//起始字符.

$StrString=substr($message,$StrStart,$len);

return $StrString;

}

function save($record)

{

global $TxtContent,$TxtEmail,$TxtHomepage,$TxtEmail,$TxtName,$TxtFrom,$TxtReply,$REMOTE_ADDR,$guestfile;

$content=file($guestfile,"r");

$space = " ";

$time = date(Y年m月d日H小時i分);

$ip=$REMOTE_ADDR;

$TxtReply=StripSlashes($TxtReply);

$TxtContent=StripSlashes($TxtContent);

$TxtContent=htmlspecialchars($TxtContent);

$TxtContent=check_strlen_long($TxtContent);

$TxtContent=nl2br($TxtContent);

$Wcontent = "<tr><td><font color=#AB00E1>留言內容:</font><br><!--content>$TxtContent<!--endcontent> ";

$Wcontent=$Wcontent."<br><font color=#6633FF>留言人大名:</font><!--name>$TxtName<!--endname> ";

if ($TxtEmail !="")

{$Wcontent=$Wcontent."<br><font color=#9900CC>電子信箱</font><a href="TxtEmail]$TxtEmail"."$space'mailto:$TxtEmail"><!--email>$TxtEmail<!--endemail></a>"."$space";}

if ($TxtHomepage !="http://")

{$Wcontent=$Wcontent."<font color=#9900CC>主頁:</font>$TxtHompage<a href="$TxtHomepage" target=new><!--homepage>$TxtHomepage<!--endhomepage></a>";}

$Wcontent=$Wcontent."<br><font color=#0000FF>時間:$time 來自:<!--from>$TxtFrom<!--endfrom> ".$ip."</font>";

$Wcontent=ereg_replace(chr(10),"",$Wcontent);

$Wcontent=$Wcontent."<hr size=1></td></tr>";

$TxtReply=ereg_replace(chr(10),"",$TxtReply);

$WContent=$Wcontent.$TxtReply."n";

$count=count($content);

$fp=fopen($guestfile,"w");

for ($i=0;$i<$count;$i++)

{

if ($i==$record-1)

{$content[$i]=$WContent;}

fputs($fp,$content[$i]);

}

fclose($fp);

}

$content=file($guestfile,"r");

$message=$content[$record-1];

$long=strlen($message);

$txtcontent=readvalue('<!--content>','<!--endcontent>');

$txtname=readvalue('<!--name>','<!--endname>');

$txtfrom=readvalue('<!--from>','<!--endfrom>');

$txtemail=readvalue('<!--email>','<!--endemail>');

$txthomepage=readvalue('<!--homepage>','<!--endhomepage>');

$txtcontent=strip_tags($txtcontent);

$tags="<!--reply>";

$txtreply=strstr($message,$tags);

$txtreply=ereg_replace(""",""",$txtreply);

if ($Submit)

{

if ($TxtPassword==$managepwd)

{

if ($TxtName!="" and $TxtContent!="")

{

save($record);

echo "<meta http-equiv=Refresh content="1;url=guest.php">";

exit;

}else {$errorm="留言人姓名和內容必填!!";}

}

else {$errorm="密碼錯誤,只有管理員有權修改!!";}

}

</head>

<? include('head.htm');?>

if ($errorm and $Submit)

{

echo"<tr>";

echo"<td height=40 colspan=4>";

echo"<font color=red>出錯了,</font>$errorm";

echo"</td>";

echo"</tr>";

}

<tr>

</td>

</td>

</tr>

<tr>

</td>

<td width="11%" height="31" bgcolor="#f0f0f0"><font color="#000000">Email</font></td>

</td>

</tr>

</tr>

</textarea>

</td>

</tr>

<font color="#000000">是否保存密碼</font>

</td>

</tr>

<? echo "$txtreply"?>

</form>

</table>

</center>

</div>

<?include('bottom.htm');?>

</body>

</html>

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該註明的地方我已作了詮釋.php可以嵌入html代碼中,這樣寫起代碼很愜意.

待續...