(PHP 4, PHP 5, PHP 7, PHP 8)
odbc_pconnect — Open a persistent database connection
$dsn,$user,$password,$cursor_option = SQL_CUR_USE_DRIVEROpens a persistent database connection.
   This function is much like
   odbc_connect(), except that the connection is
   not really closed when the script has finished.  Future requests
   for a connection with the same dsn,
   user, password
   combination (via odbc_connect() and
   odbc_pconnect()) can reuse the persistent
   connection.
  
See odbc_connect() for details.
   Returns an ODBC connection,  或者在失败时返回 false.
   error.
  
注意: Persistent connections have no effect if PHP is used as a CGI program.