我被困在转换这个基于web的应用程序的登录类型..我从网上得到的代码中，应用程序只是要求用户名，当我们进入它，它显示了对话页..但我想把登录类型转换为一个适当的一个像用户名和密码..我以前设计了一个登录系统，我想使用..的代码是绝对工作时单独使用..当组合他们不会工作..有人能告诉我结合这两个后的代码?
app的代码是index.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Chat</title>
<link type="text/css" rel="stylesheet" href="style.css" />
<link rel="stylesheet" href="css/style.css">
<style>
a:link {
color: black;
}
a:visited {
color: black;
}</style>
</head>
<body>
<?php
session_start();
?>
<div id="wrapper">
<div id="menu">
<p class="welcome">Welcome, <b><?php echo $_SESSION['name']; ?></b></p>
<p class="logout"><a id="exit" href="login.php">Exit Chat</a></p>
<div style="clear:both"></div>
</div>
<div id="chatbox"></div>
<form name="message" action="">
<input name="usermsg" type="text" id="usermsg" size="63" />
<input name="submitmsg" type="submit" id="submitmsg" value="Send" />
</form>
</div>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js"></script>
<script type="text/javascript">
// jQuery Document
$(document).ready(function(){
//If user submits the form
$("#submitmsg").click(function(){
var clientmsg = $("#usermsg").val();
$.post("post.php", {text: clientmsg});
$("#usermsg").attr("value", "");
return false;
});
//Load the file containing the chat log
function loadLog(){
$.ajax({
url: "log.html",
cache: false,
success: function(html){
$("#chatbox").html(html); //Insert chat log into the #chatbox div
},
});
}
//Load the file containing the chat log
function loadLog(){
var oldscrollHeight = $("#chatbox").attr("scrollHeight") - 20; //Scroll height before the request
$.ajax({
url: "log.html",
cache: false,
success: function(html){
$("#chatbox").html(html); //Insert chat log into the #chatbox div
//Auto-scroll
var newscrollHeight = $("#chatbox").attr("scrollHeight") - 20; //Scroll height after the request
if(newscrollHeight > oldscrollHeight){
$("#chatbox").animate({ scrollTop: newscrollHeight }, 'normal'); //Autoscroll to bottom of div
}
},
});
}
setInterval (loadLog, 2500); //Reload file every 2500 ms or x ms if you w
});
</script>
<script type="text/javascript">
// jQuery Document
$(document).ready(function(){
//If user wants to end session
$("#exit").click(function(){
var exit = confirm("Are you sure you want to end the session?");
if(exit==true){window.location = 'index.php?logout=true';}
});
});
</script>
<?php
if(isset($_GET['logout'])){
//Simple exit message
$fp = fopen("log.html", 'a');
fwrite($fp, "<div class='msgln'><i>User ". $_SESSION['name'] ." has left the chat session.</i><br></div>");
fclose($fp);
session_destroy();
header("Location: index.php"); //Redirect the user
}
?>
</body>
</html>
登录系统的代码是login.php
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="lt-ie9 lt-ie8 lt-ie7" lang="en"> <![endif]-->
<!--[if IE 7]> <html class="lt-ie9 lt-ie8" lang="en"> <![endif]-->
<!--[if IE 8]> <html class="lt-ie9" lang="en"> <![endif]-->
<!--[if gt IE 8]><!--> <html lang="en"> <!--<![endif]-->
<head>
<title>Login Form</title>
<style>
a:link {
color: black;
}
a:visited {
color: black;
}</style>
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<?php
if (!isset($_POST['submit'])){
?>
<h1 class="register-title">Welcome</h1>
<form action="<?=$_SERVER['PHP_SELF']?>" method="post" class="register">
<div class="register-switch">
<input type="radio" name="type" value="L" id="login" class="register-switch-input" checked>
<label for="login" class="register-switch-label"><a href="login.php" style="text-decoration:none;" link="#000000" vlink="#000000" alink="#000000">Login</a></label>
<input type="radio" name="type" value="R" id="Register" class="register-switch-input">
<label for="Register" class="register-switch-label"><a href="register.php" style="text-decoration:none;">Register</a></label>
</div>
<input type="text" name="username" class="register-input" placeholder="User Name">
<input type="password" name="password"class="register-input" placeholder="Password">
<input type="submit" name="submit" value="Login" class="register-button">
</form>
<?php
} else {
require_once("db_const.php");
$mysqli = new mysqli(DB_HOST, DB_USER, DB_PASS, DB_NAME);
# check connection
if ($mysqli->connect_errno) {
echo "<p>MySQL error no {$mysqli->connect_errno} : {$mysqli->connect_error}</p>";
exit();
}
$username = $_POST['username'];
$password = $_POST['password'];
$sql = "SELECT * from users WHERE username LIKE '{$username}' AND password LIKE '{$password}' LIMIT 1";
$result = $mysqli->query($sql);
if (!$result->num_rows == 1) {
echo "<p>Incorrect Password</p>";
} else {
echo "<p>Logged in successfully</p>";
// do stuffs
header("Location: index.php");
}
}
?>
</body>
</html>
你需要把<?php session_start(); ?>放在两页的最上面，在你的<!DOCTYPE或其他任何东西之前。