67. Prosty blog jednoautorski

{
  "posts": [
    {
      "id": 1,
      "title": "Mój pierwszy wpis",
      "slug": "moj-pierwszy-wpis",
      "content": "Treść wpisu...",
      "tags": ["php", "web"],
      "published_at": "2026-02-10",
      "updated_at": null
    }
  ]
}

<?php
// Generowanie sluga
function createSlug(string $title): string {
    $title = mb_strtolower($title);
    $title = strtr($title, ['ą'=>'a','ę'=>'e','ó'=>'o','ś'=>'s','ł'=>'l',
                            'ż'=>'z','ź'=>'z','ć'=>'c','ń'=>'n','ź'=>'z']);
    $title = preg_replace('/[^a-z0-9]+/', '-', $title);
    return trim($title, '-');
}

// Skrót wpisu
function getExcerpt(string $content, int $length = 150): string {
    $plain = strip_tags($content);
    if (mb_strlen($plain) <= $length) return $plain;
    return mb_substr($plain, 0, $length) . '...';
}

// Szacowany czas czytania
function readingTime(string $content): int {
    $words = str_word_count(strip_tags($content));
    return max(1, (int) ceil($words / 200)); // 200 słów/minutę
}

// Routing
$action = $_GET['action'] ?? 'list';
$id = filter_var($_GET['id'] ?? 0, FILTER_VALIDATE_INT);

match($action) {
    'view' => showPost($id),
    'new' => showNewForm(),
    'edit' => showEditForm($id),
    'delete' => deletePost($id),
    default => showList(),
};