一个简单的PHP&MYSQL留言板源码

   <title>银子留言板 Version 1.0</title>  <div id="head"> <div id="head_l"> <ul> <li></li><li>偶要发表</li>  <li>退出管理</li>  <li>偶要管理</li>  </ul></div><div id="head_r">银子留言板 Version 1.0</div></div>

 <?php $counterFile="conter.xml"; function displayCounter($counterFile){ $fp = fopen($counterFile,"rw"); $num = fgets($fp,5); $num += 1; print "<div id="footer">银子留言板 Version 1.0   您是第 "."$num"." 位无聊的银</div>"; exec("rm -rf $counterFile"); exec("echo $num > $counterFile"); } if(!file_exists($counterFile)){ exec("echo 0 > $counterFile"); } displayCounter($counterFile); ?> 

 0){ while($row = mysql_fetch_array($result)) { //echo print_r($row); if($row[2]=="男")//这个使性别改成你想要的名称^_^ { $sex = "帅锅"; } else { $sex = "美女"; } ?> <div id="show"> <p class="num">第 [] 条留言</p><p class="unline">留言人:<span class="blue"></span>  性别:  留言时间：  &Site=http://www.loai.cn&Menu=yes"> ">  IP:  ">更改 ">删除</p><p class="blue">留言内容:</p><div id="show_info"></div></div> <?php } } else { echo "<div id="show">无数据......</div>"; } ?> <div id="show_page"> <p> 1) { echo "首页 | "; echo "上一页 | "; echo "下一页 | "; echo "尾页 | "; } elseif($page>=1&&$page!=$pages&&$num>0) { echo "首页 | "; echo "上一页 | "; echo "下一页 | "; echo "尾页 | "; } elseif($page==$pages&&$page!=1) { echo "首页 | "; echo "上一页 | "; echo "下一页 | "; echo "尾页 | "; } elseif($page==$pages) { echo "首页 | "; echo "上一页 | "; echo "下一页 | "; echo "尾页 | "; } else { echo "首页 | "; echo "上一页 | "; echo "下一页 | "; echo "尾页 | "; } ?> 共 <span></span> 页 | 当前第 <span></span> 页 | 共 <span></span>&nbsp条留言</p></div>  

  <div id="input">  <h1>提交留言</h1><p>姓名 ： </p><p>性别 ： 帅锅  美女</p><p>Q Q　： (可选填)</p><p>Email： (可选填)</p><p>留言内容：</p><p><textarea name="info" rows="5" cols="40"></textarea></p><p class="cen"> </p><p class="cen1">银子留言板 Version 1.0</p></div>

 <?php require_once("conn.php"); $username = $_POST['name']; $sex = $_POST['sex']; $qq = $_POST['qq']; $email = $_POST['email']; $info = $_POST['info']; if (strrpos($username,"")!==false||strrpos($username,"@")!==false||strrpos($username,"\"")!==false||strrpos($username,"'")!==false||strrpos($username,"_")!==false) { echo ""; exit(); } if (!ereg("^[0-9]{0,}$",$qq))//用正则检查QQ格式 { echo ""; exit(); } if($email) {//如果填写了邮箱就用正则检查邮箱格式 if (!ereg("^[a-zA-Z0-9_\-\.]+@[a-zA-Z0-9\-]+\.[a-zA-Z0-9\-\.]+$",$email)) { echo ""; exit(); } } if(!$username) { echo ""; exit(); } elseif(!$info) { echo ""; exit(); } else { $ip = getenv('REMOTE_ADDR');//获取客户端IP地址 $sql = "insert into lo (username,sex,qq,email,info,ip,submit_time) values ('$username','$sex','$qq','$email','$info','$ip',NOW())"; $result = mysql_query($sql); mysql_close(); echo ""; } ?>

  <div id="update"> <form action="updatepost.php?wuleying&id=" method="post"> <h1>修改留言</h1><p>姓名：<input type="text" value="" name="name" class="y"></p><p>留言：</p><p><textarea name="info" rows="5" cols="35"></textarea></p><p class="cen"></p><p class="cen1">银子留言板 Version 1.0</p><div>  

  <div id="admin">  <h1>管理员登录</h1><p>姓名 :  </p><p>密码 :  </p><p class="cen"></p><p class="cen1">银子留言板 Version 1.0</p></div>

 <?php session_start(); require_once('conn.php'); $name = $_POST['name']; $password = $_POST['password']; $sql = "select * from admin where name='".$name."'"; $result = mysql_query($sql); $num = mysql_num_rows($result); if (strrpos($name,"")!==false||strrpos($name,"@")!==false||strrpos($name,"\"")!==false||strrpos($name,"'")!==false||strrpos($name,"_")!==false) { echo ""; } if($num) {//如果用户存在，就检查密码是否正确 $rs = mysql_fetch_array($result); if($rs[2]!=$password) { echo ""; } else {//用户名，密码都正确，注册SESSION变量，然后跳转到首页 $_SESSION["key"]=1; echo ""; } } else {//如果没有这个用户 echo ""; } ?>