=== mi13 сache ===

**Contributors:** mi13  
**Tags:** caching, page-cache, performance, optimization  
**Requires at least:** 5.0  
**Tested up to:** 6.9  
**Stable tag:** 1.6  
**Requires PHP:** 7.4  
**License:** GPLv2 or later  
**License URI:** https://www.gnu.org/licenses/gpl-2.0.html  

A lightweight plugin for line-by-line caching of WordPress pages. Speeds up site loading by saving static copies of pages.

== Description ==

Mi13 Cache is a simple and effective plugin for caching WordPress pages. It saves HTML pages as files and serves them on subsequent requests, significantly speeding up site loading.

**Key features:**

* Line-by-line caching of HTML pages.
* Flexible settings: select which page types to cache.
* Automatic cache clearing when content is updated.
* Cache status displayed as an HTML comment at the beginning of the file.
* Cache statistics: file size and number of files.
* Security: access permission checks and filtering of system pages.
* Compatibility with custom post types.

== Installation ==

**Method 1. Automatic installation:**

1. In the WordPress admin panel, go to **Plugins → Add New**.
2. Search for “Mi13 Cache”.
3. Click **Install**, then **Activate**.

**Method 2. Manual installation:**

1. Download the plugin archive.
2. Extract and upload the `mi13-cache` folder to `/wp-content/plugins/`.
3. Activate the plugin in the admin panel.
4. Add the following line to `wp-config.php`: define('WP_CACHE', true);

== Usage ==

After activation:

    Go to Settings → Mi13 Cache.

    Configure the settings:

        Select page types to cache (home page, posts, pages, categories, archives, custom types).

        Set the cache lifetime (in seconds; default is 86 400 s / 24 hours).

        Clear the cache manually using the Clear Cache button (if needed).

    Save the settings.

You can check the cache status in the page source code:

    Open the page source code (press Ctrl+U or right-click → “View Page Source”).

    Look for a comment at the very beginning of the HTML file, like this: <!-- MI13 CACHE -->

== Settings ==

    Page types — select which content types to cache.

    Cache lifetime — the interval in seconds after which the cache expires.

    Clear cache — a button to manually clear all cached files.

== HTML comment format ==

The plugin adds an HTML comment with information to the beginning of each cached file: <!-- MI13 CACHE -->

== Limitations ==

Caching does not apply to:

    authenticated users;

    the admin panel;

    404 pages;

    search pages (?s=...);

    RSS feeds (/feed/);

    AJAX requests;

    POST requests;

    URLs with GET parameters (except paged for pagination).

== Troubleshooting ==

Issue: the cache is not created.
Solution: make sure that:

    define('WP_CACHE', true) is present in wp-config.php;
    WordPress has write permissions for /wp-content/cache/mi13-cache/.

Issue: pages do not update after editing.
Solution: manually clear the cache on the settings page.

Issue: access permission error when clearing the cache.
Solution: check file permissions in the cache directory.

== Security ==

    Permission check (manage_options) before clearing the cache.

    Caching disabled for authenticated users.

    Exclusion of system pages (404, search, feed, etc.).

    Use of the secure WordPress API for file system operations.

== Directory structure ==

	Cached files are saved in: /wp-content/cache/mi13-cache/

	Each file has the .html extension and a name corresponding to the page URL.

== Changelog ==

= 1.1 =
    First.
= 1.2 =
	cosmetic
= 1.3 =
	cosmetic
= 1.4 =
	cosmetic, First release.
= 1.6 = 
	fix bug for custom post types