Đăng ký Php không gửi dữ liệu biểu mẫu

Vì lý do nào đó, tính năng này không hoạt động và sẽ không gửi bất kỳ thứ gì vào cơ sở dữ liệu của tôi. Ai đó có thể vui lòng chỉ ra vấn đề trong mã là gì?

Những gì tôi đã thử:

[FORM.HTML]

<title>Periples Business Form
<div class="container">
<center>

<h1 style="margin: 0; padding: 0">Event Registration Form</h1></center>


<hr>

<h3>Event Details.</h3>
Event Name: 


Event Type:  

  Virtual
  Live


  Event Date:  


<br>
Set Up Date: 

    Clean Up Date: 


Event Description:  <br>


Target Audience: 

  
Crowd Number: 


<hr>

<h3>Others.</h3>

Are you availing our service?
Yes
No
<br>
<br>
<br>
Foods /  Drinks
Yes
No
<br>
If yes, please enter the name of the provider: 

<br>
Audio / Visual Equipment
Yes
No
<br>
If yes, please enter the name of the provider: 


<hr>
<h3>Customer Details.</h3>
First Name: 

   
Middle Name: 


Last Name: 

   
Suffix: 


Address:  <br>


City: 

   
Province: 

<br>
Postal / Zip Code: 


Contact Number: 


Email: 


Are you an existing member?
Yes
No

<hr>

<center>

</center>

</div>

[REGISTER.PHP]

";
echo "Event Type : " .$eventtype;
echo "<br>";
echo "Event Date : " .$eventdate;
echo "<br>";
echo "Set Up Date : " .$setupdate;
echo "<br>";
echo "Clean Up Date : ".$cleanupdate;
echo "<br>";
echo "Event Description : " .$eventdesc;
echo "<br>";
echo "Target Audience : " .$targetaud;
echo "<br>";
echo "Estimated Crowd Number : " .$crowdnum;
echo "<br>";
echo "Availing Service? " .$avservice;
echo "<br>";
echo "Availing Food or Drinks? " .$avfodr;
echo "<br>";
echo "Availing Food or Drinks? " .$avequip;
echo "<br>";
echo "Provider 1 : " .$prov1;
echo "<br>";
echo "Provider 2 : " .$prov2;
echo "<br>";
echo "Customer Details!"
echo "<br>";
echo "First Name : " .$fname;
echo "<br>";
echo "Middle Name : " .$mname;
echo "<br>";
echo "Last Name : " .$lname;
echo "<br>";
echo "Suffix : " .$suffix;
echo "<br>";
echo "Address : " .$address;
echo "<br>";
echo "City : " .$city;
echo "<br>";
echo "Province : " .$province;
echo "<br>";
echo "Postal : " .$postal;
echo "<br>";
echo "Phone Number : " .$phone;
echo "<br>";
echo "Email : " .$email;
echo "<br>";
echo "Member? " .$member;

$host = "localhost";
$user = "root";
$password = "";
$database = "zsomydb1";

$con = mysqli_connect($host,$user,$password,$database);

$sql = "insert into
user_accounts(id, ename, etype, edate, setupdate, cleanupdate, edesc, targetaud, crowdnum, avservice, avfod, avequip, fname, mname, lname, suffix, address, city, province, postal, phonenum, email, member)
values('$eventname', '$eventtype', '$eventdate', '$setupdate', '$cleanupdate', '$eventdesc', '$targetaud', '$crowdnum', '$avservice', '$avfodr', '$avequip', '$prov1', '$prov2', '$fname', '$mname', '$lname', '$suffix', '$address', '$city', '$province', '$postal',  '$phone', '$email', '$member')";

mysqli_query($con, $sql);

echo "<br> Connection is now open.";
echo "<br> Record has been saved!";

?>