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...
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