Php implode issue using php and mysql

PHP
1

i am having another issue not sure why but my implode snippet has the correct parameters as it was stated on php.net but when i display it in php i get this error

Warning: implode() [function.implode]: Invalid arguments passed in /home/willbcco/public_html/facebook/invte.php on line 24

Now this is my php code


$friends = $facebook->api_client->friends_get();
 
echo "<p>Hello ".$F_user.", you have ".count($friends)." friends";
 
foreach($friends as $friend)
{
     $infos.=$friend.",";
}
//
$friends = implode(',', $friends);  
//
$infos = substr($infos,0,strlen($infos)-1);
$friends_info = $facebook->api_client->users_getInfo($infos,'first_name','uid');
foreach($friends_info as $user)
{
	$fn=$user['first_name'];
	$u=$user['uid'];
	
}
$mates = implode(',',$u);
echo $mates;

Line 24 is this


$mates = implode(',',$u);

What am i doing wrong?

Thanks,William

2

$fn and $u aren’t arrays, they are strings and will be set to whatever is in the last record.