There no benefit to fetch array instead of objects from database when you use PDO. PHP object use less memory and same fast or even faster then arrays.
Simple & secure helper to manipulate arrays in various ways
Collection implementation that wraps regular PHP arrays.
Transforms arrays using an object composition DSL.
Pack of advanced PHP array functions
A redacted PHP port of Underscore.js with additional functions and goodies – Available for Composer and Laravel
Array manipulation library for PHP, called Arrayy!
The wrapper for all PHP built-in array functions and easy, object-oriented array manipulation library. In short: Arrays on steroids.
Lightweight utilities for string & array manipulation, image handling, safe JSON encoding/decoding, validation, slug or strong password generating etc.