Joomla : Manage multi selection data

save function
$city = JRequest::getVar( 'cmbcity', '','post', 'int', JREQUEST_ALLOWRAW );
$row->city = implode(",",$city);

insert
$arrloanamt = explode(",",$row->loan_amount);

<? echo in_array($row_amt['loan_amount'], $arrloanamt) ? "selected" : ''; ?>

iphone push notification

<?php

//$message=$_GET["msg"];
$deviceToken = '';

$passphrase = '';
$message = 'Friend request accepted by Bhaskar';


$ctx = stream_context_create();
stream_context_set_option($ctx, 'ssl', 'local_cert', 'Certificates_push.pem');
stream_context_set_option($ctx, 'ssl', 'passphrase', $passphrase);

// Open a connection to the APNS server
$fp = stream_socket_client(
'ssl://gateway.sandbox.push.apple.com:2195', $err,
$errstr, 60, STREAM_CLIENT_CONNECT|STREAM_CLIENT_PERSISTENT, $ctx);

if (!$fp)
exit("Failed to connect: $err $errstr" . PHP_EOL);

//echo 'Connected to APNS' . PHP_EOL;

// Create the payload body
$body['aps'] = array(
'alert' => $message,
'sound' => 'default',
        'body' => 'this is body section of message'
);

// Encode the payload as JSON
$payload = json_encode($body);

// Build the binary notification
$msg = chr(0) . pack('n', 32) . pack('H*', $deviceToken) . pack('n', strlen($payload)) . $payload;

// Send it to the server
$result = fwrite($fp, $msg, strlen($msg));
fclose($fp);

?>