(PECL mongo >=1.6.0)
MongoCursorInterface::getReadPreference — Get the read preference for this query
Esta função não possui parâmetros.
This function returns an array describing the read preference. The array contains the values type
for the string read preference mode (corresponding to the MongoClient constants), and tagsets
containing a list of all tag set criteria. If no tag sets were specified, tagsets
will not be present in the array.