(PECL solr >= 0.9.2)
SolrInputDocument::addField — Adds a field to the document
For multi-value fields, if a valid boost value is specified, the specified value will be multiplied by the current boost value for this field.
The name of the field
The value for the field.
The index time boost for the field. Though this cannot be negative, you can still pass values less than 1.0 but they must be greater than zero.
Returns TRUE on success or FALSE on failure.