(PECL solr >= 0.9.2)
SolrQuery::getFilterQueries — Returns an array of filter queries
public SolrQuery::getFilterQueries ( ) : array
Returns an array of filter queries. These are queries that can be used to restrict the super set of documents that can be returned, without influencing score
This function has no parameters.
Returns an array on success and null if not set.
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https://www.php.net/manual/en/solrquery.getfilterqueries.php