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 <<
tem;
exit();
}
if($qq!=""&&(!is_numeric($qq)||$qq>9999999999||$qq<=9999)){
echo <<
tem;
exit();
}
if($email!=""&&(!ereg("^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-])+",$email)||strlen($email)>60)){
echo <<
tem;
exit();
}
if(strlen($post)>400){
echo <<
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 <<
tem;
}
else{
echo <<
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 "";
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 "";
}
}
?>

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(!$_SESSION['login']){
echo "";
exit();
}
if($_POST['Submit']){
if(!get_magic_quotes_gpc()){
foreach ($_POST as $items){
$items = addslashes($items);
}
}
if(strlen($_POST['revert'])>400){
echo "";
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 "";
exit();
}
else {
echo "";
}
}
?>