There is no data showing in mysql database, but my PHP script dont have an error

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SQL

PHP

XAMPP

<?php 
$yourFname = $_POST['firstname'];
$yourLname = $_POST['lastname'];
$yourAge = $_POST['age'];
$yourHeight= $_POST['height'];
$yourWeight= $_POST['weight'];
$yourEmail= $_POST['email'];
$yourCPnumber= $_POST['cpnumber'];
$yourPassword= $_POST['password'];

$conn = new mysqli('localhost', 'root', '','regisdata');

if($conn->connect_error){
    die('Connection Failed : ' .$conn->connect_error);
}
else
{
    $stmt = $conn->prepare("Insert into user_info(first_name, last_name, age, height, weight, email, cp_number, password) values (?, ?, ?, ?, ?, ?, ?, ?,)");
    if($stmt !== FALSE){
    $stmt->bind_param("ssiiisss", $yourFname, $yourLname, $yourAge, $yourHeight, $yourWeight, $yourEmail, $yourCPnumber, $yourPassword);
    
    $stmt->execute();
         $stmt->close();
    $conn->close();
    }
    echo "Success";

}
So im new to web development this is my first attempt to connect my form to the database, but it frustrate me that my php script dont have an error and still the data that i input from the form is not showing to the database 
 <pre lang="PHP">

What I have tried:

I didn't try other method to connect php to the database because i dont know what is good or bad method to try on plus im looking for a simple tutorial for me to understand well. So if there is a wrong to my code im looking forward for your suggestion to fix this problem. THANK YOU IN ADVANCE