An Oracle connection identifier, returned by oci_connect or oci_pconnect.
The Oracle user name.
The old password.
The new password to be set.
The database name.
When connection is provided, oci_password_change returns true on success, or false on failure When connection is provided, oci_password_change returns the connection resource on success, or false on failure
Changing the password either with this function or directly in Oracle should be done carefully. This is because PHP applications may continue to successfully reuse persistent connections by authenticating with the old password. The best practice is to restart all web servers whenever the user password is changed.
If upgrading the Oracle client libraries or the database from a release prior to 184.108.40.206 to version 220.127.116.11 or higher, oci_password_change may give the error "ORA-1017: invalid username/password" unless both client and server versions are upgraded at the same time.
The second oci_password_change syntax is available since OCI8 version 1.1.
In PHP versions before 5.0.0 you must use ocipasswordchange instead. This name still can be used, it was left as alias of oci_password_change for downwards compatability. This, however, is deprecated and not recommended.