点击登录按钮跳转页面问题

z526266606 2016-04-18 04:57:35

<?php
require_once('connectvars.php');
session_start();
$error_msg = "";
if(!isset($_SESSION['user_id'])){
if(isset($_POST['submit'])){
$dbc = mysqli_connect(DB_HOST, DB_USER, DB_PASSWORD, DB_NAME);
$userName = mysqli_real_escape_string($dbc, trim($_POST['userName']));
$userPassword = mysqli_real_escape_string($dbc, trim($_POST['userPassword']));
if(!empty($userName)&&!empty($userPassword)){
$query = "SELECT user_id, userName FROM userBasis WHERE userName = '$userName' AND userPassword = SHA('$userPassword')";
$data = mysqli_query($dbc, $query);
if(mysqli_num_rows($data) == 1){
$row = mysqli_fetch_array($data);
$_SESSION['user_id'] = $row['user_id'];
$_SESSION['userName'] = $row['userName'];
setcookie('user_id', $row['user_id'], time() + (60 * 60 * 24 * 15));
setcookie('userName', $row['userName'], time() + (60 * 60 * 24 * 15));
$home_url = 'http://' . $_SERVER['HTTP_HOST'] . dirname($_SERVER['PHP_SELF']) . '/index.php';
header('Location: ' . $home_url);
}
else{
$error_msg = "请输入正确的用户名或密码！";
}
}
else{
$error_msg = "请输入用户名或密码！";
}
}
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>login</title>
<link rel="stylesheet" href="css/login.css">
<script type="text/javascript">
function validateRegEx(regex, input, helpText, help){
if(!regex.test(input)){
if(helpText!=null)
helpText.innerHTML=help;
return false;
}
else{
if(helpText!=null)
helpText.innerHTML="";
return true;
}
}
function checkName(minLength, maxLength, inputField, helpText){
if(validateRegEx(new RegExp("^.{" + minLength + "," + maxLength + "}$"), inputField.value, helpText, "请依照正确长度输入！"))
validateRegEx(/^.[A-Za-z0-9]+$/, inputField.value, helpText, "有非法字符！");
}
function checkPassword(minLength, maxLength, inputField, helpText){
if(validateRegEx(new RegExp("^.{" + minLength + "," + maxLength + "}$"), inputField.value, helpText, "请依照正确长度输入！"))
validateRegEx(/^.[A-Za-z0-9]+$/, inputField.value, helpText, "有非法字符！");
}
</script>
</head>
<body onload="document.getElementById('userName').focus()">
<?php
if(empty($_SESSION['user_id'])){
echo '<p>' . $error_msg . '</p>';
?>
<div id="interFace">
<div id="title"><span>登录</span></div>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" name="loginForm">
<div class="tableRow">
<label for="userName">用户名：</label>
<input type="text" id="userName" name="userName" onblur="checkName(1, 16, this, document.getElementById('nameError'))" placeholder="请按正确格式输入">
<span id="nameError"></span>
</div>
<div class="tableRow">
<label for="userPassword">密码：</label>
<input type="password" id="userPassword" name="userPassword" onblur="checkPassword(1, 20, this, document.getElementById('passwordError'))">
<span id="passwordError"></span>
</div>
<div class="tableRow" id="btn">
<input type="submit" value="登录" onclick="placeOrder(this.form);">
<span id="formError"></span>
</div>
</form>
</div>
<?php
}
else{
echo '<p>你正在以 ' . $_SESSION . '账户名登录。</p>';
}
?>
</body>
</html>
我想登陆后进行跳转页面到index.php，这个页面和这个登录页面在一个文件夹下，请问为什么没有办法跳转？？？

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