Summary
This chapter gave us some insight into our index and into how results are ranked. We saw the parameters used to calculate the relevance score and how to extract the calculation from Solr using PHP. We discussed the use of the debug query. We saw how to extract statistics of numeric fields for a query from our index and how to display the information using PHP. The information retrieved from these modules is used to analyze and improve the Solr search results. Statistics can also be used for reporting purposes.
In the next chapter we will explore how to build spell suggestions using the Solr and PHP. We will also build an auto complete feature to suggest query options during a search.