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Vendor concept-labs
Package expression
Short Description (C)oncept-Labs Expression
License Apache-2.0

Keywords php expression composition

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Informations about the package expression

Expression

A flexible and powerful PHP library for building and composing expressions with decorators. Build SQL queries, HTML/XML, JSON/API responses, CLI commands, configuration files, code generators, and any text-based output with elegant, fluent syntax.

More than a query builder - Expression is a universal text composition framework that makes complex string building simple, maintainable, and beautiful.

Features

🔧 Fluent API - Chain methods for clean, readable code
🎨 Decorator Pattern - Transform expressions with decorators
🏗️ Composable - Nest expressions within expressions
🔄 Immutable Context - Safe context interpolation
🧩 Extensible - Easy to extend with custom decorators
✨ Type Safe - Full PHP 8.2+ type hints
🧪 Well Tested - Comprehensive test coverage with PHPUnit and Pest
🚀 Universal - Build SQL, HTML, JSON, CLI commands, configs, and more

Why Expression?

Traditional string building is error-prone, hard to read, and difficult to maintain:

Expression makes it elegant, composable, and maintainable:

Installation

Install via Composer:

Quick Start

🚀 Power Showcase

Syntax Sugar - The Magic of `__invoke()`

Expressions are callable, enabling ultra-concise syntax:

Decorator Stacking - Progressive Transformations

Chain decorators for powerful, layered transformations:

Beyond SQL - Universal Text Building

HTML Component Builder

CLI Command Builder

JSON API Response Builder

Configuration File Generator

Context Interpolation - Reusable Templates

Composition - Expressions Within Expressions

Basic Usage

Creating Expressions

Using __invoke() for Concise Syntax

Nested Expressions

Using Decorators

Wrap Expressions

Wrap Items

Custom Decorators

Context Interpolation

Clone and Prototype

Reset

Advanced Usage

Building Complex SQL Queries

Multiple Decorator Layers

API Reference

For detailed API documentation, see docs/api-reference.md.

Main Classes

Expression - Main expression class
ExpressionInterface - Interface for expressions
DecoratorManager - Manages decorators for expressions
Decorator - Static helper methods for common decorators

Key Methods

Expression Methods

__invoke(...$expressions) - Add expressions (alias for push, enables callable syntax)
push(...$expressions) - Add expressions to the end
unshift(...$expressions) - Add expressions to the beginning
wrap($left, $right = null) - Wrap the entire expression
wrapItem($left, $right = null) - Wrap each item
join($separator) - Set the join separator
decorate(callable ...$decorator) - Add expression decorator
decorateItem(callable ...$decorator) - Add item decorator
decorateJoin(callable $decorator) - Set join decorator
withContext(array $context) - Create new expression with context
reset() - Reset the expression
type(string $type) - Set expression type
isEmpty() - Check if expression is empty
prototype() - Create a clone

More Examples

📊 Markdown Table Generator

🎨 ASCII Art Generator

📝 Log Formatter

🔧 Git Command Builder

🌐 ENV File Builder

For more advanced examples including:

🏗️ HTML/XML Builders
🔌 GraphQL Query Builders
🐳 Docker Command Composers
💻 PHP Code Generators
📊 YAML Configuration Builders
🧪 Test Data Builders
🎯 DSL Creation
🎨 Creative Use Cases

See the comprehensive Advanced Examples Guide!

Testing

The package includes comprehensive tests using both PHPUnit and Pest.

Contributing

Contributions are welcome! Please see docs/contributing.md for details.

License

This package is licensed under the Apache License 2.0. See LICENSE file for details.

Credits

Viktor Halytskyi - Original author
Part of the Concept Labs ecosystem

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Package Version

Version 1.1.4 Release 25. Oct 2025
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