New in version 1.17.
Definition
- MongoDB\Collection::dropSearchIndex()
- Drop a MongoDB Search index for the collection. - function dropSearchIndex(string $name, array $options = []): void - This command can only be run on a deployment hosted on MongoDB Atlas and requires an Atlas cluster tier of at least M10. A Local Atlas Deployment can also be used for development. 
Parameters
- $name: string
- Name of the index to drop.
- $options: array
- An array specifying the desired options. NameTypeDescription- comment - mixed - Enables users to specify an arbitrary comment to help trace the operation through the database profiler, currentOp output, and logs. 
Errors/Exceptions
MongoDB\Exception\UnsupportedException if options are used and
not supported by the selected server (e.g. collation, readConcern,
writeConcern).
MongoDB\Exception\InvalidArgumentException for errors related to
the parsing of parameters or options.
MongoDB\Driver\Exception\RuntimeException for other errors at the extension level (e.g. connection errors).
See Also
- dropSearchIndex command reference in the MongoDB manual 
- MongoDB Search documentation in the MongoDB Manual