解析MySQL Query的问题

I'm trying to echo some query but it keeps giving me

Parse error: syntax error, unexpected '}', expecting ',' or ';' in C:\xampp\htdocs\test\users.inc.php on line 19

<?php
require 'connect.inc.php';

function user_list(){
    $user_list = array();
    $users_query = mysql_query("SELECT `user` FROM `20s` WHERE `online`=1 ");

    while ($users_row = mysql_fetch_assoc($users_query)) {
        $user_list[] = $users_row['user'];

        echo $user_list
    }

}
user_list();
?>

You forgot to add a semicolon here

 echo $user_list; 
                ^//<---- Add one here