first commit

config/helpers.php

@@ -0,0 +1,46 @@
+<?php
+// ============================================================
+// config/helpers.php — Shared utility functions
+// ============================================================
+
+/**
+ * Set JSON response headers and output data.
+ */
+function jsonResponse(mixed $data, int $status = 200): void {
+    header('Content-Type: application/json; charset=utf-8');
+    header('Access-Control-Allow-Origin: *');
+    header('Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS');
+    header('Access-Control-Allow-Headers: Content-Type');
+    http_response_code($status);
+    echo json_encode($data, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+    exit;
+}
+
+/**
+ * Return decoded JSON body from the request.
+ */
+function getRequestBody(): array {
+    $raw = file_get_contents('php://input');
+    $data = json_decode($raw, true);
+    return is_array($data) ? $data : [];
+}
+
+/**
+ * Get the HTTP request method.
+ */
+function getMethod(): string {
+    return strtoupper($_SERVER['REQUEST_METHOD'] ?? 'GET');
+}
+
+/**
+ * Handle CORS preflight.
+ */
+function handlePreflight(): void {
+    if (getMethod() === 'OPTIONS') {
+        header('Access-Control-Allow-Origin: *');
+        header('Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS');
+        header('Access-Control-Allow-Headers: Content-Type');
+        http_response_code(204);
+        exit;
+    }
+}