functions.php

<?php
/**
 * Theme Name: Spokojna Głowa
 * Author: Szymon Rączka
 * Description: A minimalist WordPress theme designed for the Spokojna Głowa website.
 * Version: 1.0
 */

// Remove unnecessary scripts and meta tags from wp_head
remove_action('wp_head', 'print_emoji_detection_script', 7);
remove_action('wp_print_styles', 'print_emoji_styles');
remove_action('wp_head', 'feed_links', 2);
remove_action('wp_head', 'feed_links_extra', 3);
remove_action('wp_head', 'wlwmanifest_link');
remove_action('wp_head', 'rsd_link');
remove_action('wp_head', 'rest_output_link_wp_head', 10);
remove_action('wp_head', 'wp_oembed_add_discovery_links', 10);
remove_action('wp_head', 'wp_shortlink_wp_head', 10, 0);

// Remove default WordPress styles
add_action( 'wp_print_styles', 'remove_block_css' );
function remove_block_css() {
    wp_dequeue_style( 'wp-block-library' );
    wp_dequeue_style( 'wp-block-library-theme' );
    wp_dequeue_style( 'wp-block-library-css' );
}

remove_action( 'wp_enqueue_scripts', 'wp_enqueue_global_styles' );
remove_action( 'wp_enqueue_scripts', 'wp_enqueue_classic_theme_styles' );

// Remove WordPress version numbers
add_filter('the_generator', 'remove_version');
function remove_version() {
    return '';
}

add_filter('the_generator', 'remove_version_from_rss');
function remove_version_from_rss() {
    return '';
}

add_filter('style_loader_src', 'remove_version_from_scripts_and_styles', 9999);
add_filter('script_loader_src', 'remove_version_from_scripts_and_styles', 9999);
function remove_version_from_scripts_and_styles($src) {
    if (strpos($src, 'ver=')) {
        $src = remove_query_arg('ver', $src);
    }
    return $src;
}

// Add custom styles
add_action('wp_enqueue_scripts', 'enqueue_my_style');
function enqueue_my_style() {
    wp_enqueue_style('my-style', get_template_directory_uri() . '/style.css');
}

add_theme_support( 'title-tag' );

// Generate breadcrumb structured data
add_action('wp_head', 'generate_breadcrumb_structured_data');
function generate_breadcrumb_structured_data() {
    // Get the post type
    $post_type = get_post_type();
    $post_type_object = !empty($post_type) ? get_post_type_object($post_type) : null;
    $post_type_archive = !empty($post_type) ? get_post_type_archive_link($post_type) : '';

    // Get the post title
    $post_title = get_the_title();

    // Get the post author
    $author_id = get_the_author_meta('ID');
    $author_name = get_the_author_meta('display_name');
    $author_link = get_author_posts_url($author_id);

    // Construct the breadcrumb
    $breadcrumb = array(
        "@context" => "https://schema.org",
        "@type" => "BreadcrumbList",
        "itemListElement" => array(
            array(
                "@type" => "ListItem",
                "position" => 1,
                "name" => "Spokojna Głowa",
                "item" => get_home_url()
            ),
            array(
                "@type" => "ListItem",
                "position" => 2,
                "name" => $post_type_object ? $post_type_object->labels->name : '',
                "item" => $post_type_archive
            ),
            array(
                "@type" => "ListItem",
                "position" => 3,
                "name" => $author_name,
                "item" => $author_link
            ),
            array(
                "@type" => "ListItem",
                "position" => 4,
                "name" => $post_title,
                "item" => get_permalink()
            )
        )
    );

    // Encode the breadcrumb in JSON-LD format
    $breadcrumb_json = json_encode($breadcrumb);

    // Output the breadcrumb structured data
    echo '<script type="application/ld+json">' . $breadcrumb_json . '</script>';
}


// Change author base
add_action('init', 'custom_author_base');
function custom_author_base() {
    global $wp_rewrite;
    $author_slug = 'autorzy'; // change 'profile' to whatever you want the slug to be
    $wp_rewrite->author_base = $author_slug;
}