website/test_language_switching.php

<?php
// Start session
session_start();

require_once 'includes/config.php';
require_once 'includes/translation.php';

echo "=== Testing Language Switching Fix ===\n\n";

// Test 1: Simulate URL with lang parameter
$_GET['lang'] = 'fi';
$_SERVER['REQUEST_URI'] = '/index.php?lang=fi&category=test';

echo "Test 1 - URL with lang parameter: $_SERVER[REQUEST_URI]\n";

try {
    $translation = Translation::getInstance();
    echo "Current language after lang parameter: " . $translation->getCurrentLanguage() . "\n";
    echo "Session language: " . ($_SESSION['language'] ?? 'not set') . "\n";
    echo "SUCCESS: Language switching works!\n\n";
} catch (Exception $e) {
    echo "ERROR: " . $e->getMessage() . "\n\n";
}

// Test 2: Simulate URL without lang parameter (should use session)
$_GET = array(); // Clear GET params
$_SERVER['REQUEST_URI'] = '/index.php?category=test';

echo "Test 2 - URL without lang parameter: $_SERVER[REQUEST_URI]\n";

try {
    $translation = Translation::getInstance();
    echo "Current language from session: " . $translation->getCurrentLanguage() . "\n";
    echo "Session language: " . ($_SESSION['language'] ?? 'not set') . "\n";
    echo "SUCCESS: Session persistence works!\n\n";
} catch (Exception $e) {
    echo "ERROR: " . $e->getMessage() . "\n\n";
}

// Test 3: Test language switcher generation
echo "Test 3 - Language switcher generation:\n";
$switcherHtml = $translation->getLanguageSwitcher('index.php?category=test');
echo "Language switcher HTML:\n$switcherHtml\n\n";

echo "=== All Tests Completed ===\n";
?>