php入门例子 留言板增删查

<?php include "conn.php"; include "head.php"; if($_POST['submit']){ $sql = "insert into message(user,title,content,lastdate)" . "values('$_POST[user]','$_POST[title]','$_POST[content]',now())"; mysql_query($sql); echo '<script type="text/javascript">alert("发布成功！");</script>'; } ?> <script type="text/javascript"> function checkPost(){ if(myform.user.value==""){ alert("请输入用户名！"); myform.user.focus(); return; } if(myform.title.value.length<5){ alert("标题不少于5个字符。"); myform.title.focus(); return; } } </script> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <form action="add.php" method="post" name="myform" onsubmit="checkPost();"> 用户：<input type="text" size="10" name="user" /><br/> 标题：<input type="text" name="title" /><br/> 内容：<textarea rows="10" cols="50" name="content"> </textarea><br/> <input type="submit" name="submit" value="发表留言" /> </form>