Deleting documents in Solr using PHP

Now let us go ahead and delete this document from Solr.

$deleteQuery = $client->createUpdate();
$deleteQuery->addDeleteQuery('author:Smith');
$deleteQuery->addCommit();
$client->update($deleteQuery);

Now, if we run the following query on Solr, the document is not found:

http://localhost:8080/solr/collection1/select/?q=smith

What we did here was that we created a query in Solr to search for all documents where the author field contains the smith word and then passed it as a delete query.

We can add multiple delete queries via the addDeleteQueries method. This can be used to delete multiple sets of documents in a single call.

$deleteQuery->addDeleteQuery(array('author:Burst', 'author:Alexander'));

When this query is executed, all documents where the author field is either Burst or Alexander are deleted from the index.

In addition to deleting by a query, we can also delete by ID. Each book that we have added to our index has an id field, which we...