README

A PHP library providing a clean and expressive way to implement guard clauses in your code. Built on top of webmozart/assert, this library offers a fluent interface for input validation and defensive programming.

Installation

You can install the package via Composer:

composer require jdecool/guard-clauses

Requirements

• PHP 8.1 or higher

Usage

The library provides a Guard class with static methods for various assertions:

use JDecool\GuardClauses\Guard;

// Basic type checks
$validatedValue = Guard::string($value);
$validatedValue = Guard::integer($value);
$validatedValue = Guard::float($value);
$validatedValue = Guard::boolean($value);
$validatedValue = Guard::object($value);

// String validations
$validatedValue = Guard::stringNotEmpty($value);
$validatedValue = Guard::contains($string, $substring);
$validatedValue = Guard::startsWith($string, $prefix);
$validatedValue = Guard::endsWith($string, $suffix);

// Numeric comparisons
$validatedValue = Guard::greaterThan($number, $limit);
$validatedValue = Guard::lessThan($number, $limit);
$validatedValue = Guard::range($number, $min, $max);

// Array operations
$validatedValue = Guard::isArray($value);
$validatedValue = Guard::count($array, $expectedCount);
$validatedValue = Guard::keyExists($array, $key);

// And many more...

Each assertion method accepts an optional message parameter that will be used in the exception if the assertion fails:

$validatedValue = Guard::string($value, 'The value must be a string');

Error Handling

When an assertion fails, a GuardClausesException is thrown, which extends from InvalidArgumentException.

Development

To contribute to the development of this library:

1. Clone the repository
2. Install dependencies: composer install
3. Run tests: composer test
4. Run static analysis: composer lint

License

This package is open-sourced software licensed under the MIT license.