(PECL solr >= 0.9.2)
SolrInputDocument::sort — 对文档中的字段进行排序
$sortOrderBy, int $sortDirection = SolrInputDocument::SORT_ASC): bool
The fields are rearranged according to the specified criteria and sort direction Fields can be sorted by boost values, field names and number of values. The $order_by parameter must be one of : * SolrInputDocument::SORT_FIELD_NAME * SolrInputDocument::SORT_FIELD_BOOST_VALUE * SolrInputDocument::SORT_FIELD_VALUE_COUNT The sort direction can be one of : * SolrInputDocument::SORT_DEFAULT * SolrInputDocument::SORT_ASC * SolrInputDocument::SORT_DESC
sortOrderBy排序标准
sortDirection排序方向