HTML button not selecting correct form value - php

Question

HTML button not selecting correct form value.
The following code selects data and displays it correctly in a html table: fname, lname , customer_id and the last column in the table shows a button labelled more info.
The first part of the code works fine.
<table>
<thead>
<tr>
<th>First Name</th> <th>Last Name</th> <th>Customer ID</th><th>Info</th>
</tr>
</thead>
<tbody>
<tr>
<?php
$sql = "select fname, lname,customer_id from customer_address ";
$result = mysqli_query($conn,$sql);
while($row = mysqli_fetch_assoc($result)){
$fname = $row['fname'];
$lname = $row['lname'];
$customer_id = $row['customer_id'];
echo" <tr>";
echo"<td>$fname</td>";
echo"<td>$lname</td>";
echo"<td>$customer_id</td>";
echo"<td><input type='hidden' name='customer_id' value='$customer_id'>";
echo "<button type='submit' name='submit'>More Info</button></td>" ;
}
echo" </tr>";
?>
</tbody>
</table>
</form>
With the second part of the code, I want to grab the customer_id when the button is clicked and display it below the table(I am going to uses the variable in a subsequent query to display more information later). The button selects the same customer_id no matter which button is clicked, and it is always the last record in the table. I would appreciate any help in correcting my error.
<?php
$ccf=" ";
if(isset($_POST['submit'])){
$ccf = $_POST['customer_id'];
}
echo "Customer Id selected is:$ccf";
?>

Answer 1

Your elements are all inside one form, so there are multiple elements with name='customer_id'. Place each row inside their own separate <form></form>:
<table>
<thead>
<tr>
<th>First Name</th> <th>Last Name</th> <th>Customer ID</th><th>Info</th>
</tr>
</thead>
<tbody>
<?php
$sql = "select fname, lname,customer_id from customer_address";
$result = mysqli_query($conn,$sql);
while($row = mysqli_fetch_assoc($result)){
$fname = $row['fname'];
$lname = $row['lname'];
$customer_id = $row['customer_id'];
echo" <tr>";
echo "<td>$fname</td>";
echo "<td>$lname</td>";
echo "<td>$customer_id</td>";
echo "<td>";
echo "<form action='' method='post'>";
echo "<input type='hidden' name='customer_id' value='$customer_id'>";
echo "<button type='submit' name='submit'>More Info</button>";
echo "</form>";
echo "</td>";
echo" </tr>";
}
?>
</tbody>
</table>