<?php
/**
* Health Check Endpoint
*
* Provides real-time health status of the API
* Can be used by load balancers, monitoring tools, etc.
*
* Usage:
* GET /health.php
* GET /health.php?format=prometheus (for Prometheus scraping)
* GET /health.php?format=json (default)
*/
require_once __DIR__ . '/vendor/autoload.php';
use App\Observability\Monitor;
// Load configuration
$config = require __DIR__ . '/config/api.php';
$monitorConfig = $config['monitoring'] ?? [];
// Initialize monitor
$monitor = new Monitor($monitorConfig);
// Determine output format
$format = $_GET['format'] ?? 'json';
// Set appropriate headers
if ($format === 'prometheus') {
header('Content-Type: text/plain; version=0.0.4');
echo $monitor->exportMetrics('prometheus');
} else {
header('Content-Type: application/json');
$health = $monitor->getHealthStatus();
// Set HTTP status code based on health
$statusCode = 200; // healthy
if ($health['status'] === 'degraded') {
$statusCode = 200; // still operational
} elseif ($health['status'] === 'critical') {
$statusCode = 503; // service unavailable
}
http_response_code($statusCode);
echo json_encode($health, JSON_PRETTY_PRINT);
}
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