Unsets connection. The underlying database connection is closed if no other resources are using it and if it was created with oci_connect or oci_new_connect.
It is recommended to close connections that are no longer needed because this makes database resources available for other users.
An Oracle connection identifier returned by oci_connect, oci_pconnect, or oci_new_connect.
Returns null when oci8.old_oci_close_semantics is enabled, or true otherwise.
Variables that have a dependency on the connection identifier, such as statement identifiers returned by oci_parse, must also be freed before the underlying database connection is closed.
Prior to version PHP 5.1.2 (PECL OCI8 1.1) oci_close was a no-op. In more recent versions it correctly closes the Oracle connection. Use oci8.old_oci_close_semantics option to restore old behavior of this function.
The oci_close function does not close the underlying database connections created with oci_pconnect.