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(PECL solr >= 2.2.0)
SolrQuery::addExpandSortField — Orders the documents within the expanded groups (expand.sort parameter).
$field
[, string $order
] )Orders the documents within the expanded groups (expand.sort parameter).
field
field name
order
Order ASC/DESC, utilizes SolrQuery::ORDER_* constants.
Default: SolrQuery::ORDER_DESC
SolrQuery