functions.php

<?php

require_once(__DIR__ . '/vendor/autoload.php');

$timber = new \Timber\Timber();

class kreationSite extends Timber\Site {
    public function __construct() {
        add_theme_support( 'post-thumbnails' );
        add_theme_support( 'menus' );

        add_theme_support(
            'html5',
            array(
                'comment-form',
                'comment-list',
                'gallery',
                'caption',
            )
        );
        
        add_filter( 'timber_context', array( $this, 'add_to_context' ) );
        add_action( 'after_setup_theme', array( $this,'kal_custom_add_image_sizes') );


        // TODO: This breaks the theme. Some time in recent years this failed (possibly with an upgrade to WordPress or other plugins)
        // See post: https://stackoverflow.com/questions/75688955/image-size-names-choose-not-working-with-wp-timber-theme
        //add_filter( 'image_size_names_choose', array($this,'kal_register_custom_image_sizes') );

        parent::__construct();
    }

    function add_to_context( $context ) {
        $context['menu'] = new Timber\Menu('main-menu');
        $context['site'] = $this;

        return $context;
    }
}

new kreationSite();




// ========================================================
// Scripts
// ========================================================

/*
add_filter('script_loader_src','add_nonce_to_script',10,2);
function add_nonce_to_script($src, $handle){
   $my_nonce = wp_create_nonce('nonce-'.rand());
   return $src.' nonce= '.$my_nonce;
}
*/

if ( !is_admin() ) wp_deregister_script('jquery');

function my_deregister_scripts(){
    wp_deregister_script( 'wp-embed' );
}

add_action( 'wp_footer', 'my_deregister_scripts' );



// ========================================================
// Images
// ========================================================

function kal_custom_add_image_sizes() {
    add_image_size( 'medium150w', 150, 275 );
    add_image_size( 'medium200w', 200, 350 );
    add_image_size( 'medium300w', 300, 450 );
}

function kal_register_custom_image_sizes( $sizes ) {
    return array_merge( $sizes, array(
        'medium150w' => __( 'Medium, 150w' ),
        'medium200w' => __( 'Medium, 200w' ),
        'medium300w' => __( 'Medium, 300w' )
    ) );
}


// ========================================================
// Custom post types
// ========================================================

function create_posttypes() {

    register_post_type( 'project',
        array(
            'labels' => array(
                'name' => __( 'Projects' ),
                'singular_name' => __( 'Project' )
            ),
            'public' => true,
            'has_archive' => true,
            'rewrite' => array('slug' => 'projects'),
            'show_in_rest' => true,
            'taxonomies' => array('category', 'post_tag'),
            'supports' => array('title','editor','author','thumbnail','excerpt','trackbacks','custom-fields','comments','revisions','page-attributes')
        )
    );

}

add_action( 'init', 'create_posttypes' );



// ========================================================
// Shortcodes
// ========================================================

function sc_taglist($atts){
    if ( !empty( $atts['postid'] ) ) {
        $postid = $atts['postid'];

        $postTags = get_the_tags($postid);

        if ($postTags) {
            foreach ($postTags as $tag) {
                $output .= '<div>' . $tag->name  . '</div>';
            }
        } else {
            $output = '';
        }
        return $output;

    } else {
        return '<div class="tags">' . get_the_tag_list() . '</div>';
    }
}

add_shortcode('tags', 'sc_taglist');



// ========================================================
// Miscellaneous
// ========================================================

/* Disable WordPress emoji's */
function disable_emojis() {
    remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
    remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
    remove_action( 'wp_print_styles', 'print_emoji_styles' );
    remove_action( 'admin_print_styles', 'print_emoji_styles' );
    remove_filter( 'the_content_feed', 'wp_staticize_emoji' );
    remove_filter( 'comment_text_rss', 'wp_staticize_emoji' );
    remove_filter( 'wp_mail', 'wp_staticize_emoji_for_email' );
    add_filter( 'tiny_mce_plugins', 'disable_emojis_tinymce' );
    add_filter( 'wp_resource_hints', 'disable_emojis_remove_dns_prefetch', 10, 2 );
}
add_action( 'init', 'disable_emojis' );

function disable_emojis_tinymce( $plugins ) {
    if ( is_array( $plugins ) ) {
        return array_diff( $plugins, array( 'wpemoji' ) );
    } else {
        return array();
    }
}

function disable_emojis_remove_dns_prefetch( $urls, $relation_type ) {
    if ( 'dns-prefetch' == $relation_type ) {
        // This filter is documented in wp-includes/formatting.php
        $emoji_svg_url = apply_filters( 'emoji_svg_url', 'https://s.w.org/images/core/emoji/2/svg/' );

        $urls = array_diff( $urls, array( $emoji_svg_url ) );
    }

    return $urls;
}

?>