"explain" with the new PHP driver and MongoDB 3.2?

Question

I recently upgraded the latest PHP driver and could do an "explain" query by using the "$explain" modifier when executing the query, however as of MongoDB 3.2 the operator was removed so this is no longer possible.

So my question is how can I do an explain query with the new driver and MongoDB 3.2?

Answer 1

explain is a command in MongoDB, so you can use the generic "executeCommand" method on the Manager to run explain:

http://php.net/manual/en/mongodb-driver-manager.executecommand.php

Something like:

$cmd = [
 'explain' => [
 'find' => 'collectionname',
 'filter' => [ // your query
 'name' => 'Derick'
 ],
  ¦ "everything else from https://docs.mongodb.org/manual/reference/command/find/" ¦
 ]
];

$manager->executeCommand( 'databasename', $cmd );