PHP jQuery Facebook Friend Selector

<?php
define('FACEBOOK_APP_ID', 'YOUR APP ID HERE'); 	
define('FACEBOOK_SECRET', 'YOUR APP SECRET HERE');

function array_find($needle, $haystack) {
   foreach ($haystack as $k => $v) {
     if (stripos($v, $needle) !== FALSE){
		 $oke[] = Array($k => $v);
      }
   }
 return $oke;
}

function simply_friend($friend) {
	foreach($friend as $f) {
	foreach($f as $ff) {
		$id = $ff['id'];
		$return[$id] = $ff['name'];
	}
	}
	return $return;
}

//END FUNGSI-FUNGSI

if ($cookie) {
	$user = json_decode(file_get_contents(
    'https://graph.facebook.com/me/friends?access_token=' .  $cookie['access_token']));
	
	$user = objectToArray($user);
	$user = simply_friend($user);

if(isset($_GET['text']) && (strlen($_GET['text']) >= 3)) {
		$text = $_GET['text'];
		$user = array_find($text,$user);
		echo json_encode($user);
		die();
	}
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:fb="http://www.facebook.com/2008/fbml" xmlns:og="http://opengraphprotocol.org/schema/" dir="ltr" lang="en-US">
<head profile="http://gmpg.org/xfn/11">

<title>PHP Facebook Friend Selector - by Takien.com</title>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />

/*facebook style gitulochh */
body{background:#fff;font-family:"lucida grande",tahoma,verdana,arial,sans-serif;font-size:11px;color:#333;margin:0;padding:0;text-align:left;direction:ltr;unicode-bidi:embed}

textarea,
.inputtext,
.inputpassword{border:1px solid #bdc7d8;font-family:"lucida grande",tahoma,verdana,arial,sans-serif;font-size:11px;padding:3px;
margin-bottom:5px}
.inputtext,
.inputpassword{margin:0;*margin:-1px 0;padding-bottom:4px}

.inputbutton,
.inputsubmit{border-style:solid;border-width:1px;border-color:#d9dfea #0e1f5b #0e1f5b #d9dfea;background-color:#3b5998;color:#fff;padding:2px 15px 3px 15px;text-align:center;*width:1;*overflow:visible;*padding:2px 15px}

/* mak erot */
.UIMessageBox{padding:10px;border-width:1px;border-style:solid}
.UIMessageBox .sub_message{margin:4px 0 0}
.status{background-color:#fff9d7;border-color:#e2c822}
.error{background-color:#ffebe8;border-color:#dd3c10}
.error a{color:#dd3c10}

/* misc */
input#target_id {
	width:200px;
}
#wrapper {
	width:450px;
	margin:30px auto;
}
#wrapper h1 {
	font-size:150%;
	margin:20px 0;
	text-align:center
}
#wrapper form {
	margin-bottom:20px;
}
#wrapper p {
	margin:10px 0;
	line-height:1.3em
}

/* autocomplete */
input.autocomplete-loading {
	background-image:url(autocomplete.gif);
	background-position: center right;
	background-repeat:no-repeat;
}
ul.autocomplete {
    position: absolute;
    overflow: hidden;
    background-color: #fff;
    border: 1px solid #bbbbbb;
    list-style: none;
	padding:3px;
    color: #000;
	display:none;
	z-index:1000;
}
ul.autocomplete li {
  display: block; 
  padding: 0.3em; 
  overflow: hidden;
  width: 100%;
  cursor:pointer;
  margin:0;
}

ul.autocomplete li strong {
	font-weight:bold;
	background:#d8dfea
}

ul.autocomplete li.selected {
  background-color: #3b5998 ; 
  color: #fff;
}

ul.autocomplete li.selected strong {
	background:#5670a6;
}
</style>

<body>
<div id="wrapper">
<h1>PHP jQuery Facebook Friend Selector</h1>
<?php
if(!$cookie) { ?>
<div id="error" class="UIMessageBox error">
<p style="margin:5px 0" class="sub_message" id="standard_explanation">
Your Facebook Account does not connected to this application yet, please click the Login button below. <br />
It will request permission, please click Allow to continue using this application.
</p>
</div>

<form action="" method="post">
Friend: 
<input style="margin-bottom:5px" class="inputtext" name="target_id" id="target_id" type="text" title="Start typing your Friend's name here" />
<input class="inputsubmit" type="submit" name="submit" value="Submit" />
</form>

<p>Once your Facebook account is connected to this application, you can start find your friends.
Type your friend's name in the field above, wait until it complete loaded (an animated loading image appears next to the field) then select by clicking it's name.</p>
<p>Submit the form to get $_POST value here:</p>

<?php
if(isset($_POST['submit'])) { ?>
<div id="error" class="UIMessageBox error">
<p style="margin:5px 0" class="sub_message" id="standard_explanation">
<pre>
<?php print_r($_POST); ?>
</pre>
</p>
</div>
<?php } ?>

<script type="text/javascript">
$("input#target_id").autocomplete("index.php",{minChars:3,timeout:1500,validSelection:true});
</script>

<div id="fb-root"></div>
<script>
  FB.init({appId: '<?php echo FACEBOOK_APP_ID ?>', status: true,
		   cookie: true, xfbml: true});
  FB.Event.subscribe('auth.login', function(response) {
	window.location.reload();
  });
</script>
</div>
</body>
</html>