我已经坚持了大约一天。因此，我有一个“创建帐户”页面，该页面只接受用户输入的表单并将其输入到MySQL数据库中。这里有很多代码，但简单地说来就是问题：当我单击“提交”按钮时，它什么也不做。我已经将server.php中的PHP代码指向createaccount.php中的“ Submit”按钮，但是它实际上根本不起作用，我不知道为什么。
我也有一个登录页面，但问题完全相同，但是一旦我弄清楚该如何处理，就可以自行修复，因为这基本上是相同的问题，我只是在运行一个不同的SQL查询
我还意识到我丢失了一些从SQL“ INSERT INTO”查询中的表单中捕获的变量值。我排除了那些可能引起复杂性的原因（日期格式不正确，图像没有文件存储位置等），这是解决此问题的唯一目的，因为我知道SQL查询可与简单的字符串变量一起使用。简而言之，我正在尝试缩小问题范围，并想排除SQL查询作为问题。
在此先感谢您提供的帮助。
这里是createaccount.php
<?php include('server.php') ?>
<html lang="en">
<head>
<link rel="stylesheet" type="text/css" href="createaccountstyle.css">
</head>
<!-- multistep form -->
<form method="post" action="createaccount.php" id="msform">
<?php include('errors.php'); ?>
<!-- progressbar -->
<ul id="progressbar">
<li class="active">Account Setup</li>
<li>Social Profiles</li>
<li>Personal Details</li>
</ul>
<!-- fieldsets -->
<fieldset>
<h2 class="fs-title">Create your account</h2>
<input type="text" name="username" placeholder="Username" value="<?php echo $username; ?>" />
<input type="password" name="pass" placeholder="Password" />
<input type="password" name="cpass" placeholder="Confirm Password" />
<button type="button" name="next" class="next action-button">Next</button>
</fieldset>
<fieldset>
<h2 class="fs-title">Personal Details</h2>
<input type="text" name="firstName" placeholder="First Name" />
<input type="text" name="middleName" placeholder="Middle Name or Initial" />
<input type="text" name="lastName" placeholder="Last Name" />
<p>Date of Birth</p>
<input type="date" name="dateOfBirth" />
<button type="button" name="previous" class="previous action-button">Previous</button>
<button type="button" name="next" class="next action-button">Next</button>
</fieldset>
<fieldset>
<h2 class="fs-title">Add a Profile Picture!</h2>
<h3 class="fs-subtitle">Put the Cherry on Top of your Profile</h3>
<input type="file" name="image">
<button type="button" name="previous" class="previous action-button">Previous</button>
<button type="submit" name="register" class="submit action-button">Submit</button>
</fieldset>
</form>
<center><div class="fs-title">
<p>Already Have an Account?</p>
<p><a href="login.php">Login</a></p>
</div></center>
<script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/jquery-easing/1.3/jquery.easing.min.js"></script>
<script type="text/javascript" src="createaccount.js"></script>
</html>
这里是server.php：
<?php
session_start();
// initializing variables
$username = "";
$email = "";
$errors = array();
// connect to the database
$db = mysqli_connect('127.0.0.1', 'root', 'password', 'mydb');
// REGISTER USER
if (isset($_POST['register'])) {
// receive all input values from the form
$username = mysqli_real_escape_string($db, $_POST['username']);
$password_1 = mysqli_real_escape_string($db, $_POST['pass']);
$password_2 = mysqli_real_escape_string($db, $_POST['cpass']);
$firstName = mysqli_real_escape_string($db, $_POST['firstName']);
$middleName = mysqli_real_escape_string($db, $_POST['middleName']);
$lastName = mysqli_real_escape_string($db, $_POST['lastName']);
$dateOfBirth = mysqli_real_escape_string($db, $_POST['dateOfBirth']);
$profilePic = mysqli_real_escape_string($db, $_POST['profilePicture']);
// form validation: ensure that the form is correctly filled ...
// by adding (array_push()) corresponding error unto $errors array
if (empty($username)) { array_push($errors, "Username is required"); }
if (empty($firstName)) { array_push($errors, "First Name is required"); }
if (empty($password_1)) { array_push($errors, "Password is required"); }
if ($password_1 != $password_2) {
array_push($errors, "The two passwords do not match");
}
if (empty($lastName)) { array_push($errors, "Last Name is required"); }
if (empty($dateOfBirth)) { array_push($errors, "Date of Birth is required"); }
// first check the database to make sure
// a user does not already exist with the same username and/or email
$user_check_query = "SELECT * FROM users WHERE username='$username' LIMIT 1";
$result = mysqli_query($db, $user_check_query);
$user = mysqli_fetch_assoc($result);
if ($user) { // if user exists
if ($user['username'] === $username) {
array_push($errors, "Username already exists");
}
}
// Finally, register user if there are no errors in the form
if (count($errors) == 0) {
$password = md5($password_1);//encrypt the password before saving in the database
$query = "INSERT INTO users (username, password, firstName, middleName, lastName)
VALUES('$username', '$password', '$firstName', '$middleName', '$lastName')";
mysqli_query($db, $query);
$_SESSION['username'] = $username;
$_SESSION['success'] = "You are now logged in";
header('location: index.php');
}
}
// LOGIN USER
if (isset($_POST['login'])) {
$username = mysqli_real_escape_string($db, $_POST['username']);
$password = mysqli_real_escape_string($db, $_POST['password']);
if (empty($username)) {
array_push($errors, "Username is required");
}
if (empty($password)) {
array_push($errors, "Password is required");
}
if (count($errors) == 0) {
$password = md5($password);
$query = "SELECT * FROM users WHERE username='$username' AND password='$password'";
$results = mysqli_query($db, $query);
if (mysqli_num_rows($results) == 1) {
$_SESSION['username'] = $username;
$_SESSION['success'] = "You are now logged in";
header('location: index.php');
}else {
array_push($errors, "Wrong username/password combination");
}
}
}
?>
这与问题相关（我认为），但以防万一，这里是createaccount.js文件，因为由于我设置的动画，如果没有此文件，php文件将无法工作。
//jQuery
var current_fs, next_fs, previous_fs; //fieldsets
var left, opacity, scale; //fieldset properties which we will animate
var animating; //flag to prevent quick multi-click glitches
$(".next").click(function(){
if(animating) return false;
animating = true;
current_fs = $(this).parent();
next_fs = $(this).parent().next();
//activate next step on progressbar using the index of next_fs
$("#progressbar li").eq($("fieldset").index(next_fs)).addClass("active");
//show the next fieldset
next_fs.show();
//hide the current fieldset with style
current_fs.animate({opacity: 0}, {
step: function(now, mx) {
//as the opacity of current_fs reduces to 0 - stored in "now"
//1. scale current_fs down to 80%
scale = 1 - (1 - now) * 0.2;
//2. bring next_fs from the right(50%)
left = (now * 50)+"%";
//3. increase opacity of next_fs to 1 as it moves in
opacity = 1 - now;
current_fs.css({
'transform': 'scale('+scale+')',
'position': 'absolute'
});
next_fs.css({'left': left, 'opacity': opacity});
},
duration: 800,
complete: function(){
current_fs.hide();
animating = false;
},
//this comes from the custom easing plugin
easing: 'easeInOutBack'
});
});
$(".previous").click(function(){
if(animating) return false;
animating = true;
current_fs = $(this).parent();
previous_fs = $(this).parent().prev();
//de-activate current step on progressbar
$("#progressbar li").eq($("fieldset").index(current_fs)).removeClass("active");
//show the previous fieldset
previous_fs.show();
//hide the current fieldset with style
current_fs.animate({opacity: 0}, {
step: function(now, mx) {
//as the opacity of current_fs reduces to 0 - stored in "now"
//1. scale previous_fs from 80% to 100%
scale = 0.8 + (1 - now) * 0.2;
//2. take current_fs to the right(50%) - from 0%
left = ((1-now) * 50)+"%";
//3. increase opacity of previous_fs to 1 as it moves in
opacity = 1 - now;
current_fs.css({'left': left});
previous_fs.css({'transform': 'scale('+scale+')', 'opacity': opacity});
},
duration: 800,
complete: function(){
current_fs.hide();
animating = false;
},
//this comes from the custom easing plugin
easing: 'easeInOutBack'
});
});