oci_set_client_identifier

Sets the client identifier

&reftitle.description; `bool` `oci_set_client_identifier` `resource` `connection` `string` `client_id`

Sets the client identifier used by various database components to identify lightweight application users who authenticate as the same database user.

The client identifier is registered with the database when the next 'round-trip' from PHP to the database occurs, typically when an SQL statement is executed.

The identifier can subsequently be queried, for example with `SELECT SYS_CONTEXT('USERENV','CLIENT_IDENTIFIER') FROM DUAL`. Database administration views such as `V$SESSION` will also contain the value. It can be used with `DBMS_MONITOR.CLIENT_ID_TRACE_ENABLE` for tracing and can also be used for auditing.

The value may be retained across page requests that use the same persistent connection.

&reftitle.parameters;

`connection`

- &oci.parameter.connection;

`client_id`

- User chosen string up to 64 bytes long.

&reftitle.returnvalues;

&return.success;

&reftitle.examples;

### Setting the client identifier to the application user

    <?php

    // Find the application user's login name
    session_start();
    $un = my_validate_session($_SESSION['username']);
    $c = oci_connect('myschema', 'welcome', 'localhost/XE');

    // Tell Oracle who that user is
    oci_set_client_identifier($c, $un);

    // The next round-trip to the database will piggyback the identifier
    $s = oci_parse($c, 'select mydata from mytable');
    oci_execute($s);

    // ...

    ?>

&reftitle.notes; &oci.roundtrip.caution;
&reftitle.seealso;

- `oci_set_module_name`
- `oci_set_action`
- `oci_set_client_info`
- `oci_set_db_operation`