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These utilities are designed to be standalone or used by other subsystems (like the Router) to reduce boilerplate and enable zero-config automation.

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ClassLocator

The ClassLocator is a powerful utility used to scan the filesystem and identify PHP classes that belong to a specific namespace.

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Purpose

Apivalk uses the ClassLocator primarily for automated component discovery. Instead of manually registering every controller or service, the ClassLocator can scan a directory, resolve the relative paths to PSR-4 style namespaces, and verify that the classes actually exist. It is the engine behind the automated route discovery, allowing the framework to find all controllers in your project automatically.

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Core Features

  • Recursive Scanning: Navigates through subdirectories to find all PHP files.
  • Namespace Resolution: Automatically maps directory structures to PHP namespaces.
  • Verification: Uses class_exists() to ensure that only valid, loadable classes are returned.
  • Cross-Platform Compatibility: Handles both Windows (\) and Linux (/) path separators correctly.

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Usage Example

use apivalk\apivalk\Util\ClassLocator;

// Initialize the locator with a physical path and a base namespace
$path = __DIR__ . '/Controllers';
$namespace = 'App\\Controllers';

$locator = new ClassLocator($path, $namespace);

// Find all classes in that path matching the namespace
$classes = $locator->find();

foreach ($classes as $classInfo) {
    echo "Found Class: " . $classInfo['className'] . "\n";
    echo "File Path: " . $classInfo['path'] . "\n";
}

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Methods

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__construct(string $path, string $namespace)

Initializes the locator.
  • $path: The absolute path to the directory to scan.
  • $namespace: The base namespace that corresponds to that directory.

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findClasses(): array

Scans the directory and returns an array of found classes.
  • Returns: An array of arrays, where each element contains:
    • className: The fully qualified class name.
    • path: The absolute path to the PHP file.

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Integration in Apivalk

The most common use case for ClassLocator in Apivalk is within the routing system to enable zero-config controller discovery: