Search terms
Finding the right answer fast, at any scale
Search is a deceptively complex problem — users expect instant, relevant results across massive datasets. This category covers inverted indexes, relevance ranking, full-text search, fuzzy matching, faceted search, vector similarity search, and the architectures behind search engines like Elasticsearch and Typesense. Building good search is part engineering, part information retrieval science.
BM25 Ranking
Best Match 25 — the industry-standard relevance ranking algorithm used by Elasticsearch, Lucene, and SQLite FTS5, refining TF-IDF with better document length normalisation and a term frequency saturation parameter.
2mo ago
search intermediate
Elasticsearch Fundamentals PHP 7.0+
A distributed search and analytics engine built on Lucene — storing documents as JSON, indexing them automatically, and providing a REST API for full-text search, aggregations, and real-time analytics.
2mo ago
search intermediate
Inverted Index
A data structure that maps each unique word to the list of documents containing it — the foundation of all full-text search engines, enabling fast lookup of documents matching a query term.
2mo ago
search intermediate
TF-IDF
Term Frequency–Inverse Document Frequency — a relevance scoring formula that ranks documents higher when a query term appears frequently in them but rarely across the whole collection.
2mo ago
search intermediate
Typeahead & Autocomplete PHP 7.0+
Search suggestions shown as the user types — requiring prefix matching, typo tolerance, and sub-100ms response times to feel native, implemented via dedicated index structures or edge completion APIs.
2mo ago
search intermediate
Meilisearch & Typesense PHP 7.0+
Open-source, self-hosted search engines with PHP SDKs — fast BM25 search, typo-tolerance, and faceting without the operational complexity of Elasticsearch.
2mo ago
search intermediate
Search Indexing Pipeline PHP 7.0+
The process of transforming raw content into a searchable index — extraction, normalisation, tokenisation, stemming, and index writing with incremental update strategies.
2mo ago
search intermediate
Search-as-You-Type Patterns
Implementing instant search suggestions as users type — debouncing requests, prefix indexing, highlighting matches, and managing loading/empty states.
2mo ago
search intermediate
Autocomplete & Typeahead PHP 5.0+ Showing relevant suggestions as the user types — requiring fast prefix search, debouncing, and careful UX to be helpful rather than distracting.
2mo ago
search intermediate
Faceted Search & Aggregations Dynamically computed counts for filter categories based on current results — the 'Brand (42) | Price $0-50 (18)' sidebar that refines search results.
2mo ago
search intermediate
Fuzzy Search Matching strings that are similar but not identical — tolerating typos, transpositions, and misspellings using edit distance algorithms.
2mo ago
search intermediate