Simple mysql database connection

Class DB
{
// Database connection
Var $ con = FALSE;

Function DB ($ MYSQL_HOST = MYSQL_HOST, $ MYSQL_USER = MYSQL_USER, $ MYSQL_PASS = MYSQL_PASS, $ MYSQL_DB = MYSQL_DB)
 {
$ This-> con = @ mysql_connect ($ MYSQL_HOST, $ MYSQL_USER, $ MYSQL_PASS) or die ("cocould not connect to database ");

If ($ this-> con)
  {
@ Mysql_select_db ($ MYSQL_DB, $ this-> con) or die ("cocould not select database ");
  }

Return $ this-> con;
 }

Function Query ($ SQL, $ tran = false)
 {
// If (! File_exists (MYSQL_LOG ))
//{
// @ Umask (0 );
// @ Mkdir (MYSQL_LOG, 0777 );
//}

// & Frac14; response ;־
// $ Fp = @ fopen (MYSQL_LOG.date ("Ymd"). ". txt", "");

// Zookeeper ־
// @ Fwrite ($ fp, date ("Y-m-d H: I: s"). "| $ SQL ");
// @ Fclose ($ fp );

$ This-> SQL = $ SQL;

If ($ tran)
  {
$ This-> result = @ mysql_query ($ this-> SQL) OR $ this-> RollBack ();
Return $ this-> result;
  }
Else
  {
Mysql_query ("set names 'utf8 '");
// Mysql_query ("set names 'gbk '");
$ This-> result = @ mysql_query ($ this-> SQL );
Return $ this-> result;
  }
 }

Function RollBack ()
 {
$ This-> Query ("ROLLBACK ;");
Die ("MySQL ROLLBACK ;");
 }

Function NumRows ($ result)
 {
$ This-> result = $ result;
Return @ mysql_num_rows ($ this-> result );
 }

Function FetchRow ($ result)
 {
$ This-> result = $ result;
Return @ mysql_fetch_row ($ this-> result );
 }

Function FetchArray ($ result)
 {
$ This-> result = $ result;
Return @ mysql_fetch_array ($ this-> result, MYSQL_ASSOC );
 }
Function FetchArray2 ($ result)
 {
$ This-> result = $ result;
Return @ mysql_fetch_array ($ this-> result, MYSQL_BOTH );
 }
 

Function FetchObject ($ result)
 {
$ This-> result = $ result;
Return @ mysql_fetch_object ($ this-> result );
 }

Function FreeResult ($ result)
 {
$ This-> result = $ result;
Return @ mysql_free_result ($ this-> result );
 }

Function DataSeek ($ result)
 {
// Reset the record set pointer
$ This-> result = $ result;
Return mysql_data_seek ($ this-> result, 0 );
 }
 
Function InsertID ()
 {
// $ This-> con = $ con;
Return @ mysql_insert_id ($ this-> con );
 }

Function Close ()
 {
If ($ this-> con)
  {
@ Mysql_close ($ this-> con );
  }
 }
}