Opret tabel!!!

Det her script skal jeg have oprettet en tabel til, men hvordan finder jeg ud af havd den skal hedde osv osv osv:

<?php
print \'<font face=\"helvetica\" size=\"2\" color=\"#000000\">\';

$mysql_host = \"localhost\";
$mysql_user = \"root\";
$mysql_password = \"\";
$ip = $REMOTE_ADDR;


mysql_connect($mysql_host,$mysql_user,$mysql_password);
mysql_select_db(\"systems\");
$time = explode(\" \",microtime());
$array1 = $time[0];
$array2 = $time[1];

    $r = mysql_fetch_row( mysql_query(\"SELECT * FROM online_users WHERE ip like \'$ip\'\"));
    if ($r == (false))  {
    mysql_query(\"INSERT INTO online_users (id,ip,name,date) values (\'\',\'$ip\',\'\',\'$array2\')\");
    }
mysql_query(\"DELETE FROM online_users where date < $array2 - 400\");
$res = mysql_query(\"SELECT * FROM online_users\");
$tal = mysql_num_rows($res);
if ($tal == \"1\") {
print \"1 bruger online \";
}
else {
print $tal;
print \" brugere online\";
}

?>