Cannot get array after unserialize() - php

Question

I am not getting my orignal array after using unserialize().
I am retrieving array from database and want to display it.
I have 2 arrays, created them from checkbox input, then I serialize() them and stored it in database.
Create.php
<table>
<tr>
<td>Aadhar</td>
<td><input type="checkbox" name="original[]" value="Aadhar"/></td>
<td><input type="checkbox" name="xerox[]" value="Aadhar"/></td>
</tr>
<tr>
<td>Pan Card</td>
<td><input type="checkbox" name="original[]" value="Pan Card"/></td>
<td><input type="checkbox" name="xerox[]" value="Pan Card"/></td>
</tr>
<tr>
<td>Address</td>
<td><input type="checkbox" name="original[]" value="Address"/></td>
<td><input type="checkbox" name="xerox[]" value="Address"/></td>
</tr>
<tr>
<td>Light Bill</td>
<td><input type="checkbox" name="original[]" value="Light Bill"/></td>
<td><input type="checkbox" name="xerox[]" value="Light Bill"/></td>
</tr>
<tr>
<tr>
<td><input type="submit" value="Submit" /></td>
</tr>
</table>
Create2.php(this page is just like confirmation page..before user submit to the database.)
<?php
$name = $_POST['name'];
$mobile = $_POST['mobile'];
$email = $_POST['email'];
$company = $_POST['company'];
$original_list = $_POST['original'];
$xerox_list = $_POST['xerox'];
?>
<form action="create2.php" method="POST">
<table cellpadding="10">
<tr>
<td>Name</td>
<td><input type="text" name="name" value="<?php echo $name; ?>" readonly="readonly" ></td>
</tr>
<tr>
<td>Mobile</td>
<td><input type="text" name="mobile" value="<?php echo $mobile; ?>" readonly="readonly" /></td>
</tr>
<tr>
<td>Email</td>
<td><input type="text" name="email" value="<?php echo $email; ?>" readonly="readonly" /></td>
</tr>
<tr>
<td>Company</td>
<td><input type="text" name="company" value="<?php echo $company; ?>" readonly="readonly" /></td>
</tr>
<tr>
<input type="hidden" name="original_list" value="<?php $original_list ?>" />
<input type="hidden" name="xerox_list" value="<?php $xerox_list ?>" />
<td>Documents Selected</td>
<td>
<?php
echo "<b>ORIGINAL</b><br />";
foreach($original_list as $value)
{
echo $value."<br />";
}
?>
</td>
<td>
<?php
echo "<b>XEROX</b><br />";
foreach($xerox_list as $value)
{
echo $value."<br />";
}
?>
</td>
</tr>
<tr>
<td><input type="submit" value="Confirm" /></td>
</tr>
</table>
</form>
</body>
Create2.php (insert in database)
$name = $_POST['name'];
$mobile = $_POST['mobile'];
$email = $_POST['email'];
$company = $_POST['company'];
$original = serialize($_POST['original_list']);
$xerox = serialize($_POST['xerox_list']);
echo $sql = "INSERT INTO users (name,mobile,email,company,original,xerox)
VALUES ('$name','$mobile','$email','$company','$original','$xerox')";
mysqli_query($con,$sql);
So when I try to unserialize, and display the array using foreach, this is what I get:
Warning: Invalid argument supplied for foreach()
Code:
$original = unserialize($rows['original']);
foreach($original as $value)
{
echo $value."<br />";
}