I am trying to upload data from a form to a MySQL Database and it is not working.
It just stays there and does nothing, and it does not insert into the database.
Please review my code below.
<?php
        if(isset($_POST['submit'])) {
        $first_name = $_POST['first_name'];
        $last_name = $_POST['last_name'];
        $username = $_POST['username'];
        $password = md5($_POST['password']);
        $query  = "INSERT INTO users (";
            $query .= "  first_name, last_name, username, password";
            $query .= ") VALUES (";
            $query .= " '{$first_name}', '{$last_name}', '{$username}', '{$password}'";
            $query .= ")";
            $result = mysqli_query($connection, $query);
        if($result) {
            echo "It worked";
        } else {
            echo "It did not work";
        }
        }   
?>
This is my html
           <div class="col-md-8 col-xs-12">
                    <div class="white-box">
                        <form class="form-horizontal form-material" method="post">
                            <div class="form-group">
                                <label class="col-md-12">First Name</label>
                                <div class="col-md-12">
                                    <input type="text" placeholder="John" name="first_name" class="form-control form-control-line"> </div>
                            </div>
                            <div class="form-group">
                                <label class="col-md-12">Last Name</label>
                                <div class="col-md-12">
                                    <input type="text" placeholder="Doe" name="last_name" class="form-control form-control-line"> </div>
                            </div>
                            <div class="form-group">
                                <label class="col-md-12">Username</label>
                                <div class="col-md-12">
                                    <input type="text" placeholder="Username" name="username" class="form-control form-control-line"> </div>
                            </div>
                            <div class="form-group">
                                <label class="col-md-12">Password</label>
                                <div class="col-md-12">
                                    <input type="password" placeholder="Password" name="password" class="form-control form-control-line"> </div>
                            </div>
                            <div class="form-group">
                                <div class="col-sm-12">
                                    <button class="btn btn-success">Create User</button>
                                </div>
                            </div>
                        </form>
                    </div>
                </div>
            </div>
        </div>
 
     
    