<body>
<?php
include("php/config.php");
if(isset($_POST['submit'])){
// $username =$_POST['username'];
// $PASSWORD =$_POST['PASSWORD'];
// $title =$_POST['title'];
// $first_name =$_POST['first_name'];
// $last_name =$_POST['last_name'];
// $gender =$_POST['gender'];
// $adress1 =$_POST['adress1'];
// $postcode =$_POST['postcode'];
$email = $_POST['email'];
// $telephone =$_POST['telephone'];
// $profile_blob =$_POST['profile_blob'];
$verify_query = mysqli_query($con, " SELECT email FROM users WHERE email ='$email'");
if(mysqli_num_rows($verify_query) != 0 ){
echo "<div class='message'>
<p> This email is used, Try another</p>
</div> <br>";
echo "<a href ='javascript:self.history.back()' <button class ='btn'> Go Back </button>";
}
else{
// mysqli_query($con,"INSERT INTO users(username,PASSWORD,title,first_name,last_name,gender,adress1,postcode,email,telephone)Values('$username','$PASSWORD','$title','$first_name','$last_name','$gender','$adress1','$postcode','$email','$telephone')")or die("Error Occured");
mysqli_query($con,"INSERT INTO users(email)Values('$email')")or die("Error Occured");
echo "<div class='message'>
<p> Success</p>
</div> <br>";
echo "<a href ='index.php' <button class 'btn'> Go Back </button>";
}
}else{
?>
<nav class="nav-top">
<img src="images/Logo.PNG" class="logo"> <!--The logo-->
<ul>
<li><a href="Main menu.html">RentmyCaravan.io</a></li> <!--The site title, able to be clicked to go back to the main menu-->
</ul>
<img src="images/profile photo.PNG" class="user-pic" onclick="toggleMenu()"> <!--Triggers the script to transition to the submenu-->
<div class="sub-menu-wrap" id="subMenu"> <!--Surounds the submenu-->
<div class="sub-menu"> <!--The actual submenu-->
<div class="user-info"> <!--Anything to do with the user like profile pic and username-->
<img src="images/profile photo.PNG">
<h2>Dannissoepic</h2>
</div>
<hr> <!--A break line-->
<a href="ListView.html" class="sub-menu-link"> <!--Where it links to-->
<img src="images/list.PNG"> <!--The image for it-->
<p>List view</p> <!--What the user sees-->
<span>></span> <!--Makes it look nicer as a line-->
</a>
<a href="AddScreen.html" class="sub-menu-link">
<img src="images/+.PNG">
<p>Add a caravan</p>
<span>></span>
</a>
<a href="Edit.html" class="sub-menu-link">
<img src="images/empty profile.PNG">
<p>Profile</p>
<span>></span>
</a>
<hr>
<a href="" class="sub-menu-link">
<img src="images/setting.PNG">
<p>Settings</p>
<span>></span>
</a>
<a href="Main menu.html" class="sub-menu-link">
<img src="images/signout.PNG">
<p>Sign out</p>
<span>></span>
</a>
<hr>
</div>
</div>
</nav>
<nav class="nav-site-progress">
<a href="#">Main Menu</a>
<a href="#">List View</a>
<hr>
<br>
</nav>
</header>
<div class="site">
<div class="box">
----Register new user----
<br><br>
Username <br>
<input type="text" id="username" name="username"><br><br>
Password <br>
<input type="text" id="PASSWORD" name="PASSWORD"><br><br>
Title <br>
<input type="text" id="title" name="title"><br><br>
First Name <br>
<input type="text" id="first_name" name="first_name"><br><br>
Last Name <br>
<input type="text" id="last_name" name="last_name"><br><br>
Gender
<input type="text" id="gender" name="gender">
<input type="checkbox" id="fname6.2" name="fname6.2"><br><br>
Address <br>
<input type="text" id="adress1" name="adress1"><br><br>
Postcode <br>
<input type="text" id="postcode" name="postcode"><br><br>
Email <br>
<input type="email" id="email" name="email"><br><br>
Phone Number <br>
<input type="tel" id="telephone" name="telephone"><br><br>
input profile image <br><br>
<div style="background-color: #c7c9c9; border: 1px solid black; width: 40%; height: 110px;margin-left: auto; margin-right: auto;">
<input type="image"id ="fname12" name="fname12" style="border-color: black; width: 70px; height: 50px; text-align: center; background-color: white; " value="+"><br><br>
</div>
<br><br>
<input type="submit" name="submit" value="Register" class="btn-secondary">
</div>
</div>
<script>
let subMenu = document.getElementById("subMenu"); //let submenu be called by the id submenu
function toggleMenu() //The actual function being called
{
subMenu.classList.toggle("open-menu"); //toggle the open menu css class
}
</script>
<div>
<?php } ?>
</div>
</body>
提供的代码主体，我使用了 not (!) 来强制它，并且我知道另一端的代码可以工作。但通过尝试不同的事情，有时我会收到特定字段（例如电子邮件）的未识别关键错误消息，但如果认为这是页面在按钮之前加载请求的结果。
确保您有
form<form method="post" action="yourpage.php">
Gender
<input type="text" id="gender" name="gender">
<input type="checkbox" id="fname6.2" name="fname6.2"><br><br>
Address <br>
<input type="text" id="adress1" name="adress1"><br><br>
Postcode <br>
<input type="text" id="postcode" name="postcode"><br><br>
Email <br>
<input type="email" id="email" name="email"><br><br>
Phone Number <br>
<input type="tel" id="telephone" name="telephone"><br><br>
input profile image <br><br>
<div style="background-color: #c7c9c9; border: 1px solid black; width: 40%; height: 110px;margin-left: auto; margin-right: auto;">
<input type="image"id ="fname12" name="fname12" style="border-color: black; width: 70px; height: 50px; text-align: center; background-color: white; " value="+"><br><br>
</div>
<br><br>
<input type="submit" name="submit" value="Register" class="btn-secondary">
</form>
由于您的按钮现在位于
formaction=""submitif