ORA-24315: illegal attribute type in connection file

See more:

Linux

PHP

Oracle

Hello,
I am trying to connect to remote oracle db and getting this error
ORA-24315: illegal attribute type

$db = "(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=host)(PORT=1567))(CONNECT_DATA=(SERVICE_NAME=servicename)))";

$conn=oci_connect("username","pwd",$db);

If (!$conn)
echo 'Failed to connect to Oracle error';

else
echo 'Succesfully connected with Oracle DB';
$e = oci_error(); // For oci_connect errors pass no handle
//print_r($e);
oci_close($conn);

Can anybody help me with this?

What I have tried:

tried with only hostname, servicename.