Reload function help (mysql/php)

[Kaboom]

I had another thread about a problem I was having where it's not loading from the DB right aways. My solution is to make an update function and then have the id's calling it on the page. So the thing I am wondering is how to make a working update function. I have this so far:

 

<?php
include blah....

$uid = $_SESSION["user"][0];
$avatarid = $_SESSION["user"][12];

function update($str)
{
global $db_id;
$query="select ".$str." from users where id=".$uid;
$result=mysql_query($query, $db_id);
$row=mysql_fetch_row($result);
return $row[0];
}
?>

 

and then it's being called on the profile page with <?php echo update($avatarid); ?>. I want the update() function to select avatar from users where id = userid and then return the value fresh so it's getting it new from the database every time they refresh the page. Then there won't be a problem with updating old avatar stuff.

 

Currently gives me the error:

Warning: mysql_fetch_row(): supplied argument is not a valid MySQL result resource in /home/root/public_html/func.php on line 69

 

So what am I doing wrong here? thanks for anyone who can help