(PHP 5, PHP 7 < 7.4.0)
ibase_close — Close a connection to an InterBase database
Closes the link to an InterBase database that's associated with a connection id returned from ibase_connect(). Default transaction on link is committed, other transactions are rolled back.
An InterBase link identifier returned from ibase_connect(). If omitted, the last opened link is assumed.
true on success or
false on failure.