(PECL solr >= 0.9.2)
SolrInputDocument::__clone — Creates a copy of a SolrDocument
public SolrInputDocument::__clone ( ) : void
Should not be called directly. It is used to create a deep copy of a SolrInputDocument.
This function has no parameters.
Creates a new SolrInputDocument instance.
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https://www.php.net/manual/en/solrinputdocument.clone.php