How to list MySQL tables using PHP

The following code lists all tables in a MySQL database:

mysql_connect("localhost","user","pass") or die(mysql_error());
mysql_select_db("database") or die(mysql_error());

$rs = mysql_query("show tables") or die(mysql_error());  
while($row = mysql_fetch_array( $result )) { 
  print '<br>' .  $row[0]; 
}