一个php作的文本留言本的例子(二)

  上一次我们研究了guest.php文件.具体的问题还要求读者朋友自己深入的去实践,而且需要一些工具书来学习,如果您一点php的知识都没有,笔者奉劝您就不要想下看了,笔者没有太多的时间和篇幅去逐句探究一个php文件的用途和意义.好的,接下来我们来作edit.php这个文件.

  -----------

  //edit.php

  <?

  if ($Submit)

  {

  if ($SavePassword=="on")

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

  else

  {setcookie("TxtPassword");}

  }

  ?>

  <html>

  <style type=text/css>

  Td {FONT-SIZE: 10pt;}

  TEXTAREA

  {

  FONT-FAMILY: "宋体";

  FONT-SIZE: 10pt;

  }

  </style>

  <head>

  <meta http-equiv="Content-Language" content="zh-cn">

  <meta http-equiv="Content-Type" content="text/html; charset=gb2312">

  <title>修改留言</title>

  <?

  require("sys.php");

  function readvalue($tags,$tage)

  {

  global $message,$long,$reply;

  $StrStart=strlen(strstr($message,$tags))-strlen($tags);//去除标记后变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小时i分);

  $ip=$REMOTE_ADDR;

  $TxtReply=StripSlashes($TxtReply);

  $TxtContent=StripSlashes($TxtContent);

  $TxtContent=htmlspecialchars($TxtContent);

  $TxtContent=check_strlen_long($TxtContent);

  $TxtContent=nl2br($TxtContent);

  $Wcontent = "<tr><td><font color=#AB00E1>留言内容:</font><br><!--content>$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>电子信箱</font><a href="mailto:$TxtEmail"><!--email>$TxtEmail<!--endemail></a>"."$space";}

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

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

  $Wcontent=$Wcontent."<br><font color=#0000FF>时间:$time 来自:<!--from>$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="留言人姓名和内容必填!!";}

  }

  else {$errorm="密码错误,只有管理员有权修改!!";}

  }

  ?>

  </head>

  <body bgcolor="#FFFFFF" background="back.gif">

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

  <div align="center">

  <center>

  <table border="1" width="68%" height="31" cellspacing="0" cellpadding="7" bordercolor="#E3E3E3">

  <form action="edit.php" method=post>

  <?

  if ($errorm and $Submit)

  {

  echo"<tr>";

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

  echo"<font color=red>出错了,</font>$errorm";

  echo"</td>";

  echo"</tr>";

  }

  ?>

  <tr>

  <td width="18%" height="37" bgcolor="#f0f0f0"><font color="#000000">留言大名</font></td>

  <td width="39%" height="37" bgcolor="#FFFFFF">

  <input type="text" name="TxtName" size="26" value=<?echo "$txtname"?>>

   </td>

  <td width="11%" height="37" bgcolor="#f0f0f0"><font color="#000000">来自</font></td>

  <td width="32%" height="37" bgcolor="#FFFFFF">

  <input type="text" name="TxtFrom" size="20" value=<?echo "$txtfrom"?>>

  </td>

  </tr>

  <tr>

  <td width="18%" height="31" bgcolor="#f0f0f0"><font color="#000000">主页地址</font></td>

  <td width="39%" height="31" bgcolor="#FFFFFF">

  <input type="text" name="TxtHomepage" size="26" value=<?echo "$txthomepage"?>>

  </td>

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

  <td width="32%" height="31" bgcolor="#FFFFFF">

  <input type="text" name="TxtEmail" size="20" value=<?echo "$txtemail"?>>

  </td>

  </tr>

  <tr bgcolor="#FFFFFF">

  <td height="31" colspan="4"><font color="#000000">留言内容</font></td>

  </tr>

  <tr bgcolor="#f0f0f0">

  <td height="105" colspan="4" valign="middle" align="center">

  <textarea rows="6" name="TxtContent" cols="50" wrap="VIRTUAL"><? echo "$txtcontent"?>

  </textarea>

  </td>

  </tr>

  <tr bgcolor="#FFFFFF">

  <td height="40" colspan="4" valign="middle" align="center"> <font color="#000000">修改密码</font>

  <input type="password" name="TxtPassword" size="10" value=<?echo "$TxtPassword"?>>

  <font color="#000000">是否保存密码</font>

  <input type="checkbox" name="SavePassword" value="on" checked>

  <input type=hidden name=record value=<? echo "$record"?>>

  <input type="submit" value="我要修改了" name="Submit">

  </td>

  </tr>

  <? echo "$txtreply"?>

  <input type=hidden name=TxtReply value="<? echo "$txtreply" ?>">

  </form>

  </table>

  </center>

  </div>

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

  </body>

  </html>

  ----------

  该注明的地方我已作了诠释.php可以嵌入html代码中,这样写起代码很惬意.

  待续...