https://www.php.net/manual/uk/solrquery.addfield.php
PHP: SolrQuery::addField - Manual
Specifies which fields to return in the result
phpaddfieldmanual
https://www.php.net/manual/it/solrdocument.addfield.php
PHP: SolrDocument::addField - Manual
Adds a field to the document
phpsolrdocumentaddfieldmanual
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https://www.php.net/manual/zh/solrquery.addfield.php
PHP: SolrQuery::addField - Manual
Specifies which fields to return in the result
phpaddfieldmanual
https://www.php.net/manual/it/solrquery.addfield.php
PHP: SolrQuery::addField - Manual
Specifies which fields to return in the result
phpaddfieldmanual