Getting variables out of an array...

[listenmirndt]

all i want to do is update the database for each unique_id# variable...
but the unique_id# increments automatically and i don't know how many increments there will be....

Array
(
    [unique_id_2] => 348
    [txn_type] => masspay
    [payment_gross_1] => 0.01
    [payment_date] => 04:50:06 Oct 18, 2010 PDT
    [payment_gross_2] => 0.01
    [last_name] => xxx
    [masspay_txn_id_1] => 9C9131166S823725B
    [mc_fee_1] => 0.01
    [receiver_email_1] => xxx
    [mc_fee_2] => 0.01
    [receiver_email_2] => xxx
    [masspay_txn_id_2] => 4MX44776SP637553J
    [residence_country] => CA
    [verify_sign] => xxx
    [payer_status] => verified
    [payer_email] => xxx
    [first_name] => xxx
    [payment_fee_1] => 0.01
    [payment_fee_2] => 0.01
    [payer_id] => xxx
    [payment_status] => Completed
    [status_1] => Completed
    [status_2] => Completed
    [mc_gross_1] => 0.01
    [charset] => windows-1252
    [mc_gross_2] => 0.01
    [notify_version] => 3.0
    [mc_currency_1] => USD
    [mc_currency_2] => USD
    [unique_id_1] => 347
)

[bradgrafelman]

Do you not have any control over how the data is submitted? If not, you could do something like...

$unique_id = array();

foreach($array as $key => $value)
    if(substr($key, 0, 10) == 'unique_id_')
        $unique_id[substr($key, 10)] = $value;

EDIT: Just to clarify, the above code would give you a new array, $unique_id, which should be a bit easier to work with, e.g.:

Array
(
    [2] => 348
    [1] => 347
)