[JAFRI]

Allow administrator to see all online users including invisible
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Add the following before return $sql;

if ($userid == ADMINUSERIDHERE) { 

    $sql = ("select DISTINCT ".TABLE_PREFIX.DB_USERTABLE.".".DB_USERTABLE_USERID." userid, ".TABLE_PREFIX.DB_USERTABLE.".".DB_USERTABLE_NAME." username, ".TABLE_PREFIX.DB_USERTABLE.".".DB_USERTABLE_LASTACTIVITY." lastactivity, ".TABLE_PREFIX.DB_USERTABLE.".".DB_USERTABLE_USERID." avatar, ".TABLE_PREFIX.DB_USERTABLE.".".DB_USERTABLE_USERID." link, cometchat_status.message, cometchat_status.status from ".TABLE_PREFIX.DB_USERTABLE." left join cometchat_status on ".TABLE_PREFIX.DB_USERTABLE.".".DB_USERTABLE_USERID." = cometchat_status.userid where ".TABLE_PREFIX.DB_USERTABLE.".".DB_USERTABLE_USERID." <> '".mysql_real_escape_string($userid)."' and ('".$time."'-lastactivity < '".ONLINE_TIMEOUT."') order by username asc");

} 

return $sql; // ALREADY PART OF php