(PECL openal >= 0.1.0)
openal_listener_get — Retrieve a listener property
Property to retrieve, one of: AL_GAIN (float), AL_POSITION (array(float,float,float)), AL_VELOCITY (array(float,float,float)) 和 AL_ORIENTATION (array(float,float,float)).
Returns a float or array of floats (as appropriate), or FALSE on failure.