In this example, the setupFS function is called to initialize the ownCloud filesystem, and then the filesystem is used to open a file in read mode.
Example 2:'/var/www/owncloud/data', 'dbtableprefix' => 'oc_', 'mount_config' => array(), ); OC_Util::setupFS($config);In this example, the setupFS function is called with a custom configuration array that specifies the data directory and database table prefix for the ownCloud instance. Based on the function name and class namespace, it can be determined that this function is a part of the ownCloud PHP library package.