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(PECL solr >= 0.9.2)
SolrQuery::getFacetSort — Returns the facet sort type
$field_override
] )Returns an integer (SolrQuery::FACET_SORT_INDEX or SolrQuery::FACET_SORT_COUNT)
field_override
The name of the field
Returns an integer (SolrQuery::FACET_SORT_INDEX or SolrQuery::FACET_SORT_COUNT) on success or NULL
if not set.