require_once '/Config.php'; (since PEAR 1.4.0)
string|false PEAR_Config::getDefaultChannel ([string $layer = NULL])
string|false PEAR_Config::getDefaultChannel
On startup, channels are not initialized, so if the default channel is not pear.php.net, then initialize the config.
layer from which to retrieve the registry, or null for the first to match
throws no exceptions thrown
This function can not be called statically.
