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Example code of hypothesisphp/lens

Informations about the package lens

Lens

Lens is a reusable object that knows how to locate, read, and transform a specific piece of data inside any object or array.

Installation

Quick Start

Why Lens?

The Problem

Working with nested data in PHP is verbose and error-prone:

The Solution

Features

Read

Write (Immutable)

Transform

Mutable Mode

Batch Operations

Nullable & Default

Composition

Pipelines

Path Syntax

Syntax Example Meaning
Property name Access name property/key
Dotted address.city Deep access
Index orders.0 Array index
Wildcard orders.* All elements
Quoted "special.key" Key with dots
Escaped foo\.bar Literal dot in key

Exists & Unset

Works With

Documentation

Topic Description
Getting Started Install and first steps
Path Syntax All path expressions
Immutable vs Mutable When to use each mode
Batch Operations Single-clone batch changes
Composition Combining lenses
Traversals Focusing on multiple targets
Pipelines Chaining transformations
Attributes PHP 8 Attribute configuration
Extending Custom strategies, plugins, macros
Performance Optimization details
Static Analysis PHPStan & Psalm
Migration Guide Moving from other approaches
Architecture Complete design document

Extensibility

Custom Clone Strategy

Custom Metadata Provider

Macros

Plugins & Middleware

Static Analysis

Fully compatible with PHPStan (level max) and Psalm (level 1). Generic type annotations:

Requirements

Architecture

The library is modular and interface-driven. Every component is independently replaceable:

See ARCHITECTURE.md for the complete design document.

Testing

License

MIT License. See LICENSE.

Credits

Inspired by functional programming lenses (Haskell, Scala, Monocle) — redesigned for PHP.

All versions of lens with dependencies

PHP Build Version
Package Version
Requires php Version >=8.2
ext-mbstring Version *
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