Conexion directa a una base de datos con php

[FenixDI]

ya lo encontre:

$cfg_dsn = "DRIVER=Microsoft Access Driver (*.mdb);
DBQ=C:/ruta/base.mdb;
UserCommitSync=Yes;
Threads=3;
SafeTransactions=0;
PageTimeout=5;
MaxScanRows=8;
MaxBufferSize=2048;
DriverId=281;
DefaultDir=C:/ProgramFiles/CommonFiles/ODBC/DataSources";

$cfg_dsn_login = "";
$cfg_dsn_mdp = "";

$id_conexion=odbc_connect($cfg_dsn,$cfg_dsn_login, $cfg_dsn_mdp);