A complete guide to MongoDB in PHP — the mongodb/mongodb driver, connections and URIs, CRUD with documents and filters, aggregation pipelines, indexing, multi-document transactions, GridFS for large files, schema validation, and when to choose MongoDB over relational databases.
A complete guide to Elasticsearch in PHP — the elastic/elasticsearch driver, document indexing, full-text search with the query DSL, filters and aggregations, autocomplete with edge n-grams, highlighting, pagination, bulk indexing, and when to choose Elasticsearch over a regular database.