First pass of features

includes/utils.php

@@ -20,4 +20,16 @@ function ensureExportDirectory() {
     if (!file_exists(EXPORT_DESTINATION)) {
         mkdir(EXPORT_DESTINATION, 0755, true);
     }
-} 
+}
+
+/**
+ * Base path prefix for JSON API under this app (e.g. /familyHub/api).
+ */
+function familyHubWebApiBase(): string {
+    $sd = dirname($_SERVER['SCRIPT_NAME'] ?? '/');
+    $sd = rtrim(str_replace('\\', '/', $sd), '/');
+    if ($sd === '' || $sd === '/') {
+        return '/api';
+    }
+    return $sd . '/api';
+}