Process multiple arrays from form - php

Question

I am trying to process multiple arrays from a form, but I constantly face the issue where only the last field is submitted.
The form is echoing results (IP addresses and their rDNS settings) from an simple xml output and publishing these in an editable form and table.
<?php include_once("API.php");
$ips=array('xx.xx.xx.xx','xx.xx.xx.xx','xx.xx.xx.xx');
foreach($ips as $ip){
$API->GetRdns($ip);
$xml = simplexml_load_string($API);
}
foreach ($xml->RdnsDetails as $RdnsDetails) :?>
<tr>
<td><?php echo $ip; ?></td>
<td><input type="text" name="hostname" value="<?php echo $RdnsDetails->hostname; ?>"></td>
<td><input type="text" name="extra" value="<?php echo $RdnsDetails->extra; ?>"></td>
</tr>
<?php endforeach; ?>
When the submit button is clicked, the changes have to be submitted.
<button type="submit" name="submit">Submit</button>
<?php if (isset($_POST['submit'])){
foreach ($ips as $ip) {
$API->Sent($ip,$_POST[hostname],$_POST[extra])
}
?>
How do I get the values 'hostname' and 'extra' submitted for each of the IP's ($ip)?

Answer 1

You should try creating an array instead of a single value. Try this:
<tr>
<td><?php echo $ip; ?></td>
<td><input type="text" name="ip[<?php echo $ip; ?>]['hostname']" value="<?php echo $RdnsDetails->hostname; ?>"></td>
<td><input type="text" name="ip[<?php echo $ip; ?>]['extra']" value="<?php echo $RdnsDetails->extra; ?>"></td>
</tr>
You can catch this with:
<?php if (isset($_POST['submit'])){
foreach ($_POST['ip'] as $ip => $info) {
$API->Sent($value,$info['hostname'],$info['extra']);
}
?>

Answer 2

You should bind your submit button into a <form> to get the values
<form>
<?php foreach ($xml->RdnsDetails as $RdnsDetails) :?>
<tr>
<td><?php echo $ip; ?></td>
<td><input type="text" name="hostname" value="<?php echo $RdnsDetails->hostname; ?>"></td>
<td><input type="text" name="extra" value="<?php echo $RdnsDetails->extra; ?>"></td>
</tr>
<?php endforeach; ?>
<button type="submit" name="submit">Opslaan</button>
</form>
another problem is you missed '' here:
$API->Sent($value,$_POST['hostname'],$_POST['extra'])

Answer 3

a form by default will only send one value for each "name" entity in the form. Can you try adding the brackets to the [name] property of the inputs so it sends the values as an array ?
I think i understand a little more now, you need the association between the IP and the hostname/extra values. How about if you add the ip as a hidden form field
<?php foreach ($xml->RdnsDetails as $RdnsDetails) :?>
<tr>
<td><?php echo $ip; ?></td>
<td><input type="hidden" name="ips[]" value="<?php echo $ip; ?>"></td>
<td><input type="text" name="hostname[]" value="<?php echo $RdnsDetails->hostname; ?>"></td>
<td><input type="text" name="extra[]" value="<?php echo $RdnsDetails->extra; ?>"></td>
</tr>
<?php endforeach; ?>
then you can process in the backend something like this:
<?php
$ips = $_POST['ips'];
$hostnames = $_POST['hostname'];
$extras = $_POST['extras'];
for($i=0;$i<count($ips);$i++)
{
echo "IP: " . $ips[i] . ", Hostname: " . $hostnames[i] . ", Extra: " . $extras[$i];
}