How do I echo dynamic session variables in PHP?

Order Page: On this page, customers can choose to add business card orders with different foreign languages and other options.

When the user clicks on a button to add an additional card, javaScript adds a series of form fields and in order to give them unique name attributes, I am simply adding a counter variable at the end of the name for each group of fields, so I can save them as a unique group of session variables where each form field has different names but the same counter number at the end so I know they belong together.

These are the session variables I am saving when the user submits the form to go to the next page:

• $_SESSION[quantity1] = 500
• $_SESSION[language1] = Korean
• $_SESSION[quantity2] = 250
• $_SESSION[language2] = Chinese

Che开发者_如何转开发ckout Page: On this page, I want it to echo out the information for each different card ordered.

I am trying to echo out all the session variables with the same number at the end of the session variable on the checkout page. So far I'm using a foreach loop to echo out all the session variables, but I am trying to only echo out the ones with a '1' at the end of the names, or a '2' at the end of the names, etc, and group them together.

So ideally, I would like something like this:

Order #1,

Quantity: 500,

Language on Card: Korean

Order #2,

Quantity: 250,

Language on Card: Chinese

How can I echo and group these dynamic session variables on the checkout page?

Why not store in the session in a manner like this?

$_SESSION[orders] => array(
  [0]=>array(
     'quantity'=>1,
     'language'=>'Korean'
   ),
  [1]=>array(
    'quantity'=>2,
    'language'=>'Chinese'
   ),
)

Then your iteration on checkout page will be simple

Restructure your session when saving to it instead:

• $_SESSION[order][1][quantity] = 500
• $_SESSION[order][1][language] = Korean
• $_SESSION[order][2][quantity] = 250
• $_SESSION[order][2][language] = Chinese

That way you can use foreach() on order to get it all cleanly.

Grouping the fields is relatively easy. Just loop through them all, pull off the number at the end and groups them in another array.

$vars = array();
foreach ($_SESSION as $k => $v) {
  if (preg_match('!\d+$!', $k, $matches)) {
    $number = $matches[0];
    if (array_key_exists($number, $vars)) {
      $vars[$number][$k] = $v;
    } else {
      $vars[$number] = array($k => $v);
    }
  }
}
print_r($vars);

To display them loop through $vars and do what you need to do. You may need to sort $vars if you want them in a particular order. You may need to sort the sub-arrays to put the fields in a particular order.