php简易留言板程序代码_PHP教程

session_start();
$con=mysql_connect('localhost','root','root') or die('链接数据库失败！');
mysql_query('set names utf8');
mysql_select_db('GuestBook');

$pagesize = 10;//每一页显示多少留言记录
if(isset($_GET['page'])&&$_GET['page']!='') $page=$_GET['page'];
else $page=0;

$sql = "SELECT a . * , b.name, b.email, b.qq, c.revert_time, c.revert
  FROM post a
  LEFT JOIN revert c ON ( a.id = c.post_id ) , guest b
  WHERE a.guest_id = b.id
  ORDER BY a.id DESC";
$numRecord = mysql_num_rows(mysql_query($sql));
$totalpage = ceil($numRecord/$pagesize);

$recordSql = $sql. " LIMIT ".$page*$pagesize.",".$pagesize;
$result = mysql_query($recordSql);
?>

post.php文件

header('content-type:text/html;charset=utf-8');
//如果PHP设置的自动转义函数未开启，就转义这些值
if(!get_magic_quotes_gpc()){
 foreach ($_POST as &$items){
  $items = addslashes($items);
 }
}

$name = $_POST['name'];
$qq = $_POST['qq'];
$email = $_POST['email'];
$post = $_POST['post'];

if($name==""||strlen($name)>10){
 echo  
tem;
exit();
}
if($qq==""&&$email==""){
 echo  <script><br /> alert('Email和QQ必须输入一个！');<br /> history.go(-1);<br /> </script>
tem;
exit();
}
if($qq!=""&&(!is_numeric($qq)||$qq>9999999999||$qq  echo  <script><br /> alert("请输入正确的QQ号码");<br /> history.go(-1);<br /> </script>
tem;
exit();
}
if($email!=""&&(!ereg("^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-])+",$email)||strlen($email)>60)){
 echo  <script><br /> alert("请输入正确的Email");<br /> history.go(-1);<br /> </script>
tem;
exit();
}
if(strlen($post)>400){
 echo  <script><br /> alert("输入的留言内容太长！");<br /> history.go(-1);<br /> </script>
tem;
exit();
}

//链接数据库
$con=mysql_connect('localhost','root','root') or die('链接数据库失败！');
mysql_query('set names utf8');
mysql_select_db('GuestBook');

//把客户信息插入guest表
$insertSql="insert into guest (name,qq,email) values ('$name','$qq','$email')";
if(mysql_query($insertSql)){
 $guestid = mysql_insert_id();
}
else{
 echo $insertSql;
 echo mysql_error();
 echo "数据插入失败!";
 exit();
}

//把以上插入取得的客户id和留言信息插入到post表中
$post_time = time();
$insertPostSql = "insert into post(guest_id,post,post_time) values('$guestid','$post','$post_time')";
if(mysql_query($insertPostSql)){
 echo  <script><br /> alert("留言成功");<br /> location.href="index.php";<br /> </script>
tem;
}
else{
 echo  <script><br /> alert("留言失败");<br /> location.href="index.php";<br /> </script>
tem;
}
?>

session_start();
header('content-type:text/html;charset=utf-8');
$con=mysql_connect('localhost','root','root') or die('链接数据库失败！');
mysql_query('set names utf8');
mysql_select_db('GuestBook');

if(!$_SESSION['login']){
 echo "<script>alert('权限不足!');location.href='index.php';</script>";
 exit();
}

if(isset($_GET['id'])&&$_GET['id']!=""){
 $delRevertSql="delete from revert where post_id=".$_GET['id'];
 mysql_query($delRevertSql);
 
 $delGuestSql="delete from guest where id = (select guest_id from post where id=".$_GET['id'].")";
 mysql_query($delGuestSql);
 
 $delPostSql="delete from post where id=".$_GET['id'];
 mysql_query($delPostSql);
 
 if(mysql_error()==""){
  echo "<script>alert('删除成功!');location.href='index.php';</script>";
 }
}
?>

session_start();
$con=mysql_connect('localhost','root','root') or die('链接数据库失败！');
mysql_query('set names utf8');
mysql_select_db('GuestBook');

if(!$_SESSION['login']){
 echo "<script>alert('没有登录不能回复!');location.href='index.php';</script>";
 exit();
}
if($_POST['Submit']){
 if(!get_magic_quotes_gpc()){
  foreach ($_POST as $items){
   $items = addslashes($items);
  }
 }
 if(strlen($_POST['revert'])>400){
  echo "<script>alert('回复内容过长!');history.go(-1);</script>";
  exit();
 }
 $post_id = $_POST['post_id'];
 $revert = $_POST['revert'];
 $insertRevertSql = "insert into revert (post_id,revert,revert_time) value('$post_id','$revert','$time')";
 if(mysql_query($insertRevertSql)){
  echo "<script>alert('回复成功');location.href='index.php';</script>";
  exit();
 }
 else {
  echo "<script>alert('回复失败!');history.go(-1);</script>";
 }
}
?>