Hjælp til array

......
$postdata = implode("&", $tmp);
if($row['mobilnr1']) {
    $postdata .= "&recipient[]=45".$row["mobilnr1"];
}
if($row['mobilnr2']) {
    $postdata .= "&recipient[]=45".$row["mobilnr2"];
}

$settings["username"] =  $row7["userGateway"];
$settings["password"] =  $row7["passwordGateway"];
$settings["utf8"] = "1";

// Removed - $input["recipient[]"] = "45".$row2["mobilnr1"];
$input["from"]        = "Adgang til lejren";
$input["message"]    = $row7["smsTekstEfter"];
$input["timestamp"] =  $afsendTid;

$posts = array_merge($settings, $input);
foreach($posts as $key => $value) {
    $tmp[] = $key."=".$value;
}

// Added code
$mobileNumbers = array();

// Collecting all of the mobile numbers from $row2 and storing them for insertion to $tmp later.
foreach($row2 as $mobileNumberKey => $mobileNumber) {
    array_push($mobileNumbers, "45".$mobileNumber);
}

foreach($mobileNumbers as $value) {
    $tmp[] = 'recipient[]=' . $value;
}

$postdata = implode("&", $tmp);

// Your result for testing
echo '<pre>';
print_r($postdata);
echo '</pre>';