insert value of select form into mysql - php

Question

I have a form that adds vehicles to a database, there are 2 drop down select fields in the form, 'Make' and 'Model'
When I select an option from either one to insert it into the stock table in the database the make 'ID' or model 'ID' gets inserted into vehicle make / model rather than the name of the vehicle make, so '3' gets inserted instead of 'Volkswagen'
Here is some of my code
<form action="addstock.php" method="post" enctype="multipart/form-data">
<div class="make">
<div id="field1">Make:</div> <div id="field2">
<select name="mke" id="mke">
<?php
include 'includes/db2.php';
$SQL = "SELECT * FROM make";
$query = mysqli_query($con, $SQL);
while ($row = mysqli_fetch_array($query)) {
$res = "<option ";
$res .= "value='".$row['code']."'>";
$res .= $row['vehicle_make'];
$res .= '</option>';
echo $res;
}
?>
</select>
</div>
</div>
</div>
<script src="jquery/jquery-2.1.4.min.js"></script>
<script>
$(document).ready(function(){
$('#mke').change(function(){
var code = $(this).val();
var data = 'code='+code;
$.ajax({
type : "POST",
url : "fill.php",
data : data,
cache: false,
success: function(html)
{
$('#mdl').html(html);
}
});
});
});
</script>
Code for the model drop down option, the rest of the code for this is on another page (fill.php)
<div id="field1">Model:</div> <div id="field2">
<select name="mdl" id="mdl">
<option selected="selected">Model</option>
</select>
</div>
</div>
fill.php page
if(isset($_POST['code']))
{
$SQL = "SELECT * FROM model WHERE MakeCode = '".$_POST['code']."'";
$query = mysqli_query($con, $SQL);
if(mysqli_num_rows($query) == 0 )
{
echo '<option>No Results</option>';
} else {
while ($row = mysqli_fetch_array($query)) {
$res = "<option ";
$res .= "value='".$row['id']."' >";
$res .= $row['vehicle_model'];
$res .= "</option>";
echo $res;
}
}
} else {
echo '<option >error</option>';
}
?>
Back on the addstock.php page here is the insert code
<?php
if(isset($_POST['addstock'])){
$mke = $_POST['mke'];
$mdl = $_POST['mdl'];
$addstock = "insert into stock (veh_make,veh_model) values('$mke','$mdl')";
$addsto = mysqli_query($con, $addstock);
if($addsto){
echo "<script>alert('Vehicle has been added')</script>";
echo "<script>window.open('addstock.php','_self')</script>";
}
}
I'm fairly new to php and not sure how to insert the name instead of the id, as when I am trying to display a vehicle on another page the ID's show like 3 4, instead of Volkswagen Golf
Hope you understand what I mean
Any help is much appreciated!

Answer 1

You can insert the result of a SELECT statement that gets you the make and model:
"insert into stock (veh_make,veh_model) select make.vehicle_make, vehicle_model FROM make, model WHERE make.id=$mke AND model.id=$mdl"
But this is wrong DB design. stock should not contain make and model names, but rather IDs, references to rows in other tables, or Foreign Keys.