(PECL solr >= 0.9.2)
SolrQuery::removeFilterQuery — Removes a filter query
public SolrQuery::removeFilterQuery ( string $fq ) : SolrQuery
Removes a filter query.
fq
The filter query to remove
Returns the current SolrQuery object, if the return value is used.
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https://www.php.net/manual/en/solrquery.removefilterquery.php