Insert checkbox corresponding quantity into database - php

Question

I have multiple checkbox in my form and the person need to input the quantity of the types of item that is selected. Now, my problem is that I can't get the data to be inserted into database.
This is my add_record.php code:
<?php
include("connect.php");
include("header.php");
$sql_student = "SELECT * FROM student";
$result_student = mysql_query($sql_student);
?>
<form method="post" id="add_form" action="add_record.php">
<label>Name</label>
<input placeholder="Enter Student Name" type="text" name="name" id="name" class="form-control" />
<br />
<input placeholder="Enter Student ID" type="text" name="stud_id" id="stud_id" class="form-control" />
<br />
<?php
$sql_baggage = "SELECT * FROM baggage";
$result_baggage = mysql_query($sql_baggage);
?>
<label>Bag Types</label></br>
<table style="border:none;">
<?php while($row_bag = mysql_fetch_array($result_baggage))
{
$baggage_id = $row_bag['baggage_id'];
?>
<tr>
<td><?php echo $row_bag['baggage_id'];?>
<td><?php echo $row_bag['baggage_type'];?></td>
<td><input type="checkbox" name="tick[]" value="<?php echo $baggage_id;?>"/></td>
<td><input type="text" size="2" name="txt[<?php echo $baggage_id;?>]" placeholder=" "></td>
<?php
?></td></tr>
</table>
<br />
<input type="submit" name="submit" id="submit" value="Add Record" class="btn btn-success btn-secondary pull-right" />
</form>
<?php
if(isset($_POST['submit']))
{
$name = $_POST["name"];
$stud_id = $_POST["stud_id"];
$stu_query = "INSERT INTO student(student_id,student_name) VALUES ('$stud_id','$name')";
if(mysql_query($stu_query))
{
if(!empty($_POST['tick']))
{
foreach($_POST['tick'] as $selected)
{
$qty = $_POST['txt'][$selected];
$inv_query = "INSERT INTO inventory (invstu_id,invbag_id,invbag_quantity) VALUES
('$stud_id','$selected', '$qty')";
if(mysql_query($inv_query))
{
echo'<script>alert("A record has been inserted!")</script>';
}
else
{
echo "Database error";
}
}
}
else
{
echo'<script>alert("A record has been inserted!")</script>';
}
}
}
?>
</body>
</html>
I know that the data is passed through foreach function since I get the echo of database error two times when I tick two of the checkbox. However, the value is not inserted into the database.

Answer 1

Finally solve the issue by echoing the mysql_error(), there is nothing wrong with the code. Just a bit problem at the database. Thanks!!