- array_map: documentation ( source)
<?php
$user_meta = array ( 'interest' => array ( '0' => ''), 'type' =>
array ( '0' => ''), 'user_status' => array ( '0' => 'deny'),
'firstname' => array ( '0' => ''),'lastname' => array ( '0' => 'B' ) ,
'email' => 'alin:pulamea2010' );
$user_meta = (object)$user_meta;
$names = array_map(
function($person) { return $person[0]; },
(array)$user_meta
);