PHP delete/update only affects last MySQL row - php

Question

Whether using the delete or update function, only the last row is updated/deleted. It doesn't matter what field I update/delete, only the last row is passed. I'm unable to find the issue other than the fact that a unique ID is not being passed. I'm new to PDO, so I'm not too familiar with debugging. Any help is appreciated.
<form action="" id="form" method="post">
<?php
function UserForm($customers = array())
{
ob_start(); ?>
<?php
$id = $customers['id'];
?>
<tr>
<td><input type="text" name="name" value="<?php echo $customers['name']; ?>"></td>
<td><input type="text" id="email" name="email" value="<?php echo $customers['email']; ?>"></td>
<td><input type="text" id="phone" name="phone" value="<?php echo $customers['phone']; ?>"></td>
<td><input type="text" id="address" name="address" value="<?php echo $customers['address']; ?>"></td>
<td><input type="text" id="proudct" name="product" value="<?php echo $customers['product']; ?>"></td>
<td><input type="text" id="firmware" name="firmware" value="<?php echo $customers['firmware']; ?>"></td>
<td><input type="text" id="datepicker" class="datepicker" name="purchase_date" value="<?php echo $customers['purchase_date']; ?>"></td>
<td align="center">
<input type="hidden" name="id" value="<?php echo $id; ?>">
<input type="submit" value="<?php echo $id; ?>" name="delete" value="X" onclick="return confirm('WARNING! \n\nAre you sure you want to DELETE?')" >
</td>
</tr>
<tr>
<td colspan="8">
<input type="hidden" name="id_update" value="<?php echo $id; ?>" />
<input type="submit" name="update" value="Update <?php echo $id; ?>" />
</td>
</tr>
<?php
$data = ob_get_contents();
ob_end_clean();
return $data;
} ?>
<?php
$pdo = new PDO("mysql:host=localhost;dbname=project", $username, $password, array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION));
//$query = $pdo->prepare("SELECT * FROM customers ORDER BY purchase_date ASC");
if (isset($_POST['desc'])){
$sort = "desc";
$query = $pdo->prepare("SELECT * FROM customers ORDER BY purchase_date DESC");
}
else {
$sort = "asc";
$query = $pdo->prepare("SELECT * FROM customers ORDER BY purchase_date ASC");
}
$query->execute();
?>
<table class="table table-striped table-bordered table-responsive">
<thead>
<tr>
<th>Name</th>
<th>Email</th>
<th>Phone</th>
<th>Address</th>
<th>Product</th>
<th>Firmware Version</th>
<th align="center">
Purchase Date
<?php
if ($sort == "asc") {
echo '<input type="hidden" value="Desc" name="desc" id="sort">';
echo '<a name="desc" href="javascript: submitform()">Desc</a>';
}
else {
echo '<input type="hidden" value="Asc" name="asc" id="sort">';
echo '<a name="asc" href="javascript: submitform()">Asc</a>';
}
?>
</th>
<th>Delete</th>
</tr>
</thead>
<?php
while($customers = $query->fetch(PDO::FETCH_ASSOC)){
echo UserForm($customers);
} //end of while
// Delete customer
if(isset($_POST['delete'])) {
try{
$id = $_POST['id'];
$query = $pdo->prepare("delete from customers where id = :id");
$query->bindParam(':id', $id);
$query->execute(array(':id' => $id));
echo "Customer successfully deleted." . $_POST['id'];
echo '<META http-equiv="refresh" content="1;URL=view_edit.php">';
}catch(PDOException $e){
echo "Failed to delete the MySQL database table ... :".$e->getMessage();
} //end of try
} //end of isset delete
// Edit customer
if(isset($_POST['update'])) {
try {
$name = $_POST['name'];
$id = $_POST['id'];
$email = $_POST['email'];
$phone = $_POST['phone'];
$address = $_POST['address'];
$product = $_POST['product'];
$firmware = $_POST['firmware'];
$purchase_date = $_POST['purchase_date'];
$query = $pdo->prepare("UPDATE customers SET name = '$name', email = '$email', phone = '$phone', address = '$address', product = '$product', firmware = '$firmware', purchase_date = '$purchase_date' where id = '$id'");
$query -> execute( array(
':name' => $name,
':email' => $email,
':phone' => $phone,
':address' => $address,
':product' => $product,
':firmware' => $firmware,
':purchase_date' => $purchase_date
));
echo "Customer succesfully updated" . $id;
echo '<META http-equiv="refresh" content="1;URL=view_edit.php">';
}catch(PDOException $e){
echo "Error! Failed to update customers :".$e->getMessage();
}//end of try
} //end of isset update
?>

Answer 1

To debug your code, try using print_r($_POST); exit(); immediately after your if(isset($_POST['delete/update'])) { to see what's being passed in the array when you post.
I'm a bit of a noob myself, but I suspect the problem here could be you haven't defined where your form starts and ends, so you're submitting the whole table. Try adding a form for each of your records, with a form name the same as your customer id.
<form name="formname<?php echo $id; ?>"> ... your input fields and submit button... </form>, then when you submit, you'll only be submitting that particular form and the data it contains.
I hope that helps!

Answer 2

$query = $pdo->prepare("delete from customers where id = :id"
I bet this ID is unique..

Answer 3

Resolved the issue. Moved the <form> tag above the beginning of the table row.