(PECL solr >= 0.9.2)
SolrInputDocument::sort — Sorts the fields within the document
public SolrInputDocument::sort ( int $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
The sort criteria
sortDirection
The sort direction
Returns true
on success or false
on failure.
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https://www.php.net/manual/en/solrinputdocument.sort.php