Provider modules are modules that provide services to other modules.
The module type constant is MODULE_PROVIDER.
string|array(string) query_provides()
returns the name of the service or services this module provides,
either as a string or as an array of strings.
Methods available to other modules are:
RoxenModule conf->get_provider( string service )
Returns the provider module that handles the service 'service', or
one with highest priority if there are several. conf is the
configuration object for the virtual server (id->configuration()
fetches the current request's configuration). Any public function (or
data element) can be reached via the returned module object.
array(RoxenModule) conf->get_providers( string service )
Returns all provider modules that handle the service 'service' 'conf' is
the configuration object for the virtual server.
void map_providers( string service, string fun, mixed ... args )
Calls the method named fun in all modules providing the service
service. The method will be called with args as arguments.
mixed call_provider( string service, string fun, mixed ... args )
Calls the method named 'fun' in modules providing the service service
with the arguments args. Modules will get called until one module
returns a non-zero value. That return value, or zero if all modules
returned zero, will be returned.
