Libraries that implement data structure or storage techniques.
- Ardent - A library of data structures.
- Cake Collection - A simple collections library (CP).
- Collections - Collections Abstraction library for PHP.
- Fractal - A library for converting complex data structures to JSON output.
- Ginq - Another PHP library based on .NET's LINQ.
- JsonMapper - A library that maps nested JSON structures onto PHP classes.
- Knapsack - Collection library inspired by Clojure's sequences.
- PHP Collections - A simple collections library.
- PINQ - A PHP library based on .NET's LINQ (Language Integrated Query).
- Porter - Data import abstraction framework.
- Serializer - A library for serialising and de-serialising data.
- Totem - A library to manage and create data changesets.
- YaLinqo - Yet Another LINQ to Objects for PHP.
- Zend Serializer - Another library for serialising and de-serialising data (ZF2).