extension=oci8_12c  ; Use with Oracle Database 12c Instant Client
extension=php_oci8.dll
extension=php_oci8_12c.dll
extension=php_oracle.dll
extension=pdo_odbc
extension=pdo_pgsql

<?php

    $conn="(DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.9)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = PRD)
      (SERVER = DEDICATED)
    )
    )";
    $conexao = oci_connect('DBA', '123', $conn);

    if (isset ($conexao) || empty($conexao)){
        $erro = oci_error();
        trigger_error(htmlentities($erro['erro'], ENT_QUOTES), E_USER_ERROR);
    exit;
    }

    echo"Hello";

?>

Fatal error: Uncaught Error: Call to undefined function oci_connect() in C:wamp64wwwTestetestesconexaooracle.php on line 12

Error: Call to undefined function oci_connect() in C:wamp64wwwTestetestesconexaooracle.php on line 12