(PECL solr >= 2.2.0) Returns group fields (group.field parameter values)

(PECL solr >= 0.9.2) Sets the search query

(PECL solr >= 0.9.2) Checks if a field exists

(No version information available, might only be in Git) Collapses the result set to a single document per group

(PECL solr >= 0.9.2) Sets the minimum document frequency used for determining term count

(PECL solr >= 0.9.2) Returns whether or not the TermsComponent is enabled

(PECL solr >= 0.9.2) Returns whether or not the collapse contiguous fragments into a single fragment

(PECL solr >= 0.9.2) Returns an array of URL-encoded parameters

(PECL solr >= 2.2.0) Returns max parameter

(PECL solr >= 0.9.2) Returns the maximum number of tokens to parse in each document field that is not stored