List DB and Tables using PHP

$conn = mysql_connect("localhost", "root", "") or die("Could not connect: " . mysql_error());

    //List DB

    $result = mysql_list_dbs( $conn );

    while( $row = mysql_fetch_object( $result ) ):

         echo  $row->Database "<br />";

    endwhile;

   //List Tables

  $db_name  = "test";

  $tables = mysql_list_tables("$db_name");

   while (list($table) = mysql_fetch_row($tables)) {

    $treeNodes->add($table,$table,$table,true,false,"","");

   }

  or

 $tables_list = mysql_query("SHOW TABLES FROM $db_name");