(PECL solr >= 0.9.2)
SolrDocument::getFieldNames — Returns an array of fields names in the document
public SolrDocument::getFieldNames ( ) : array
Returns an array of fields names in the document.
This function has no parameters.
Returns an array containing the names of the fields in this document.
© 1997–2020 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/solrdocument.getfieldnames.php