php foreach loop: parsing values of a form into array - php

Question

I'm working on a CakePHP project. I want to merge the values of $value into a string/array so I can later merge it with the string "TESTING" then implode the outcome to a single string without spaces!!!
<?php
$merge="TESTING"; ?>
<form method="post" name="payment_form" action="<?php echo $action; ?>">
<?php foreach ($fields as $name => $value): ?>
<input type="hidden" name="<?php echo $name; ?>" value="<?php echo $value; ?>"/>
<?php endforeach; ?>
<p>some text<input type="submit" value="submit"/></p>
</form>
How can this be done? Thanks in advance.
EG: Please I want to keep the code as is. Meaning no for(var i=0;i++...) loops
Example
Let's say the values of the form are 1 2 3 productnr the outcome should be a string 123productnrTESTING no spaces just a string.
Well i wanted to send that data to a bank gateway to be processed. So it goes like this
1)Bank has sent me a string (The one called TESTING)
2)I print my form data (with the above code)
3) I need to send that data + the string provided into an imploded string to the bank gateway. Hope that clarifies some things :)

Answer 1

If I understand your question correctly, you would need to add a hidden field merge as a last one
The form page (View)
<?php
$merge="TESTING";
?>
<form method="post" name="payment_form" action="<?php echo $action; ?>">
<?php foreach ($fields as $name => $value): ?>
<input type="hidden" name="<?php echo $name; ?>" value="<?php echo $value; ?>"/>
<?php endforeach; ?>
<input type="hidden" name="merge" value="<?php echo $merge; ?>
<p>some text<input type="submit" value="submit"/></p>
</form>
The action page (Action Controller)
If you are using CakePHP, you would need to get POST data from the Cake Request object.
$merge = implode($this->request->params);
echo $merge;