Hi : Problem solved I find this in the ORACLE docs: http://www.oracle.com/technetwork/articles/technote-php-instant-084410.html Problem, Instant client instaled, but this folder was not in the path. Path change, php can connect to Oracle. De: Alejandro Michelin Salomon (HOTMAIL) [mailto:amichelins@xxxxxxxxxxx] Enviada em: sábado, 19 de dezembro de 2015 14:36 Para: 'php-general@xxxxxxxxxxxxx' Assunto: Error ORA-12557 When connecting to Oracle Hi : I am using PHP 5.6.11 x64 in Windows 8.1 na APACHE 2.4.x I a have problem with this code : <?php $conn = oci_connect('sri', '23wq@34.t', '127.0.0.1/orcl'); if (!$conn) { $e = oci_error(); trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR); } ?> The erro is : Warning: oci_connect(): in D:\webroot\pdo.php on line 2 Fatal error: ORA-12557: TNS:adaptador de protocolo não carregável in D:\webroot\pdo.php on line 5 Code with PDO_Oci has the same problem. I check my oracle connection with : 1) TNSPING Result OK 2) SqlDevelopper Result OK I make some querys whithout errors Phpinfo() information says that OCI and PDO OCI are instaled oci8 OCI8 Support enabled OCI8 DTrace Support disabled OCI8 Version 2.0.8 Revision $Id: f04114d4d67cffea4cdc2ed3b7f0229c2caa5016 $ Oracle Run-time Client Library Version 11.2.0.1.0 Oracle Compile-time Instant Client Version 11.2 PDO Driver for OCI 8 and later enabled ?--with-pdo-oci=c:\php-sdk\oracle\x64\instantclient_12_1\sdk,shared" "--with-oci8-12c=c:\php-sdk\oracle\x64\instantclient_12_1\sdk,shared" What is brong with my instalation? Alejandro M.S e-mail: <mailto:everton.corso@xxxxxxxxx> amichelins @hotmail.com skype: <mailto:everton.corso@xxxxxxxxx> amichelins @hotmail.com