Provider modules are modules that provide services to other modules. The module type constant is MODULE_PROVIDER. The available API method is:

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.

object 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.

array(object) 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.