Cannot insert when clicking a button in Mysql using PHP - php

Question

I am a beginner in web development, I used have an html elements, like textbox and other type of elements, I want to use them as my object and when they have a value and click a button, it will save the value of all the elements in mysql.
I have a code like this, but it cannot be inserted and anything does not happen when clicking a button.
Please help.
PHP:
<?php
define('DB_SERVER', 'localhost');
define('DB_USERNAME', 'root');
define('DB_PASSWORD', '');
define('DB_DATABASE', 'ytp');
$db = mysqli_connect(DB_SERVER,DB_USERNAME,DB_PASSWORD,DB_DATABASE);
if(!$db ) {
die('Could not connect: ' . mysqli_error());
}
$fname = "";
$mname = "";
$lname = "";
$funame = "";
$cnum = "";
$bday = "";
$age = "";
$add = "";
if (isset($_POST['submit'])){
$fname = $_POST['fName'];
$mname = $_POST['mName'];
$lname = $_POST['lName'];
$funame = $_POST['fuName'];
$cnum = $_POST['Cnumber'];
$bday = $_POST['bday'];
$age = $_POST['age'];
$add = $_POST["address"];
}
$sql = "INSERT INTO employee ".
"(fName,mName,lName,fuName,cNumber,bDay,Age,Address) ".
"VALUES ('$fname','$mname','$lname','$funame','$cnum','$bday','$age','$add' )";
if (! mysqli_query($db , $sql)){
echo 'Cannot Insert';
}
else{
echo 'Success';
}
?>
HTML:
<div class="content">
<div class="row">
<div class="col-md-10">
<div class="card">
<div class="card-header">
<h5 class="title">Add User Information</h5>
</div>
<div class="card-body">
<form method="POST" action="php_functions\saveEmployee.php" name="INSERT">
<div class="row">
<div class="col-md-5 pr-md-1">
<div class="form-group">
<label>Company (disabled)</label>
<input type="text" class="form-control" disabled="" placeholder="Company" value="Benchmark Valuer's Inc.">
</div>
</div>
<div class="col-md-3 px-md-1">
<div class="form-group">
<label>ID</label>
<input type="text" class="form-control" placeholder="User ID" value="" id="id" name ="id" disabled>
</div>
</div>
<div class="col-md-4 pl-md-1">
<div class="form-group">
<label for="exampleInputEmail1">Email address</label>
<input type="email" class="form-control" placeholder="s.sample#gmail.com" id="email" name ="email">
</div>
</div>
</div>
<div class="row">
<div class="col-md-4 pr-md-1">
<div class="form-group">
<label>First Name</label>
<input type="text" class="form-control" placeholder="First Name" id="fName" name ="fName">
</div>
</div>
<div class="col-md-4 pl-md-1">
<div class="form-group">
<label>Middle Name</label>
<input type="text" class="form-control" placeholder="Middle Name" id="mName" name ="mName">
</div>
</div>
<div class="col-md-4 pl-md-1">
<div class="form-group">
<label>Last Name</label>
<input type="text" class="form-control" placeholder="Last Name" id="lName" name ="lName">
</div>
</div>
<div class="col-md-4 pl-md-1" hidden>
<div class="form-group">
<label>Fullname</label>
<input type="text" class="form-control" placeholder="Full Name" id="fuName" name ="fuName">
</div>
</div>
</div>
<div class="row">
<div class="col-md-4 pr-md-1">
<div class="form-group">
<label>Contact Number</label>
<input type="tel" class="form-control" placeholder="Contact Number" id="Cnumber" name="Cnumber">
</div>
</div>
<div class="col-md-4 pl-md-1">
<div class="form-group">
<label>Age</label>
<input type="number" class="form-control" placeholder="Age" id="age" name="age">
</div>
</div>
<div class="col-md-4 pl-md-1">
<div class="form-group">
<label>Birthday</label>
<input type="date" class="form-control" placeholder="Birthday" id="bday" name="bday">
</div>
</div>
</div>
<div class="row">
<div class="col-md-12">
<div class="form-group">
<label>Address</label>
<input type="text" class="form-control" placeholder="Home Address" id="address" name ="address">
</div>
</div>
</div>
<div class="row">
<div class="col-md-4 pr-md-1">
<div class="form-group">
<label>Username</label>
<input type="text" class="form-control" placeholder="Username" id="uName">
</div>
</div>
<div class="col-md-4 px-md-1">
<div class="form-group">
<label>Password</label>
<input type="password" class="form-control" placeholder="Password" id="pWord">
</div>
</div>
<div class="col-md-4 pl-md-1">
<div class="form-group">
<label>UserType</label>
<input type="number" class="form-control" placeholder="0" id="uType">
</div>
</div>
</div>
<div class="row" hidden>
<div class="col-md-12">
<div class="form-group">
<label>Image Path:</label>
<input type="text" class="form-control" placeholder="C:\\" id="imageURL">
</div>
</div>
</div>
</form>
</div>
<div class="card-footer">
<button type="submit" class="btn btn-fill btn-primary" id="submit" name="submit">Save</button>
<button class="btn btn-fill btn-success" id="btnBrowse">Browse</button>
<button class="btn btn-fill btn-danger" id="btnCancel">Cancel</button>
</div>
</div>
</div>
</div>
</div>

Answer 1

Your HTML form is closing before submit button. You should close that after submit button and also need to manage hierarchy of opening form tag as below:
<form method="POST" action="php_functions\saveEmployee.php" name="INSERT">
<div class="card-body">
<div class="row">
<div class="col-md-5 pr-md-1">
<div class="form-group">
<label>Company (disabled)</label>
<input type="text" class="form-control" disabled="" placeholder="Company" value="Benchmark Valuer's Inc.">
</div>
</div>
<div class="col-md-3 px-md-1">
<div class="form-group">
<label>ID</label>
<input type="text" class="form-control" placeholder="User ID" value="" id="id" name ="id" disabled>
</div>
</div>
<div class="col-md-4 pl-md-1">
<div class="form-group">
<label for="exampleInputEmail1">Email address</label>
<input type="email" class="form-control" placeholder="s.sample#gmail.com" id="email" name ="email">
</div>
</div>
</div>
<div class="row">
<div class="col-md-4 pr-md-1">
<div class="form-group">
<label>First Name</label>
<input type="text" class="form-control" placeholder="First Name" id="fName" name ="fName">
</div>
</div>
<div class="col-md-4 pl-md-1">
<div class="form-group">
<label>Middle Name</label>
<input type="text" class="form-control" placeholder="Middle Name" id="mName" name ="mName">
</div>
</div>
<div class="col-md-4 pl-md-1">
<div class="form-group">
<label>Last Name</label>
<input type="text" class="form-control" placeholder="Last Name" id="lName" name ="lName">
</div>
</div>
<div class="col-md-4 pl-md-1" hidden>
<div class="form-group">
<label>Fullname</label>
<input type="text" class="form-control" placeholder="Full Name" id="fuName" name ="fuName">
</div>
</div>
</div>
<div class="row">
<div class="col-md-4 pr-md-1">
<div class="form-group">
<label>Contact Number</label>
<input type="tel" class="form-control" placeholder="Contact Number" id="Cnumber" name="Cnumber">
</div>
</div>
<div class="col-md-4 pl-md-1">
<div class="form-group">
<label>Age</label>
<input type="number" class="form-control" placeholder="Age" id="age" name="age">
</div>
</div>
<div class="col-md-4 pl-md-1">
<div class="form-group">
<label>Birthday</label>
<input type="date" class="form-control" placeholder="Birthday" id="bday" name="bday">
</div>
</div>
</div>
<div class="row">
<div class="col-md-12">
<div class="form-group">
<label>Address</label>
<input type="text" class="form-control" placeholder="Home Address" id="address" name ="address">
</div>
</div>
</div>
<div class="row">
<div class="col-md-4 pr-md-1">
<div class="form-group">
<label>Username</label>
<input type="text" class="form-control" placeholder="Username" id="uName">
</div>
</div>
<div class="col-md-4 px-md-1">
<div class="form-group">
<label>Password</label>
<input type="password" class="form-control" placeholder="Password" id="pWord">
</div>
</div>
<div class="col-md-4 pl-md-1">
<div class="form-group">
<label>UserType</label>
<input type="number" class="form-control" placeholder="0" id="uType">
</div>
</div>
</div>
<div class="row" hidden>
<div class="col-md-12">
<div class="form-group">
<label>Image Path:</label>
<input type="text" class="form-control" placeholder="C:\\" id="imageURL">
</div>
</div>
</div>
</div>
<div class="card-footer">
<button type="submit" class="btn btn-fill btn-primary" id="submit" name="submit">Save</button>
<button class="btn btn-fill btn-success" id="btnBrowse">Browse</button>
<button class="btn btn-fill btn-danger" id="btnCancel">Cancel</button>
</div>
</form>
Hope it helps you.

Answer 2

the form has been closed before the submit button.
the </form> tag should be placed after the <div class="card-footer">...</div>.
please try it. hope it will help.