php string error

[nvt10512]

i am experiencing some weird behaviour here.i am using the following code to reference the facebook api.\[code\]$query = "SELECT msg, user_id, comment_time FROM comments WHERE aid = '$aid' ORDER BY comment_time DESC"; $result = mysql_query($query) or die("ERROR: $query.".mysql_error()); if (mysql_num_rows($result) > 0) { while($row = mysql_fetch_object($result)){ $uidval = $row->user_id; $posterInfo = $facebook->api_client->users_getInfo($uidval, array('name', 'pic_square_with_logo', 'profile_url')); $nameuser = $posterInfo[0]['name']; //this is line 50 $pic = $posterInfo[0]['pic_square_with_logo']; $profile_url = $posterInfo[0]['profile_url']; echo '<img src="'.$pic.'" />'; echo '<a href="'.$profile_url.'">'.$nameuser.'</a>'; echo '<br>'; echo $row->comment_time; echo '<br>'; echo $row->msg; } }\[/code\]it gives me this error:\[code\]Fatal error: Cannot use string offset as an array in /home/amitver/public_html/roadies/comments.php on line 50\[/code\]but surprisingly i am using the exact same code successfully at the top of my page. why this weird behaviour. this is the code at the top of page:\[code\]//connect to fB $uid = $user_id; $userInfo = $facebook->api_client->users_getInfo($user_id, array('name', 'pic_square')); $nameuser = $userInfo[0]['name']; $pic = $userInfo[0]['pic_square'];\[/code\]