great for adding unintended parameters in other functions like facet.contains ?php $facet = 'title' ; $str='isto'; $query = new SolrQuery($filter);$query->setFacet(true)->setShowDebugInfo(true);$query->addFacetField($facet)->setFacetMinCount(1)->setFacetLimit(200)->setfacetsort(SolrQuery::TERMS_SORT_INDEX);$query->addparam('facet.contains',$str) ; ?>// result of $query->getparams() //check the lastone array(8) { ["q"]=> array(1) { [0]=> string(20) "collection_id_str:61" } ["facet"]=> array(1) { [0]=> string(4) "true" } ["debugQuery"]=> array(1) { [0]=> string(4) "true" } ["facet.field"]=> array(1) { [0]=> string(11) "440a_str_mv" } ["facet.mincount"]=> array(1) { [0]=> string(1) "1" } ["facet.limit"]=> array(1) { [0]=> string(3) "200" } ["facet.sort"]=> array(1) { [0]=> string(5) "index" } ["facet.contains"]=> array(1) { [0]=> string(4) "isto" }}