(PECL solr >= 2.2.0) Overrides main filter query, determines which documents to include in the main group

(PECL solr >= 0.9.2) Returns the number of fields in the document

(PECL solr >= 0.9.2) Creates a copy of a SolrDocument object

(PECL solr >= 2.2.0) Returns group cache percent value

(PECL solr >= 2.2.0) Returns a string representing the constructed collapse function

(PECL solr >= 0.9.2) Deletes all documents matching the given query

(PECL solr >= 0.9.2) Returns the text snippet generator for highlighted text

(PECL solr >= 0.9.2) Sets the frequency below which terms will be ignored in the source docs

(PECL solr >= 0.9.2) Toggles the echoHandler parameter

(PECL solr >= 2.2.0) Allows grouping results based on the unique values of a function query (group.func parameter)