functions.php

<?php

function sakura_theme_setup() {
    add_theme_support('post-thumbnails');
    add_image_size( 'category-thumb', 300, 9999 );
    register_nav_menus( array( //複数のナビゲーションメニューを登録する関数
        //'「メニューの位置」の識別子' => 'メニューの説明の文字列',
          'main-menu' => 'ドロワー内部',
          'footer-menu'  => 'Footer Menu',
        ) );
}
add_action('after_setup_theme', 'sakura_theme_setup');

/* 投稿アーカイブを有効にしてスラッグを指定する */
function post_has_archive( $args, $post_type ) {

    if ( 'post' == $post_type ) {
        $args['rewrite'] = true;
        $args['has_archive'] = 'news'; // スラッグ名
    }
    return $args;

}
add_filter( 'register_post_type_args', 'post_has_archive', 10, 2 );

function sakura_theme_link(){
    wp_enqueue_style('common-css', get_template_directory_uri() .'/css/style.css');
    wp_enqueue_style('sp-css', get_template_directory_uri() .'/css/style_sp.css', array(), '1.0.0', 'screen and ( max-width:768px )');
    wp_enqueue_style('pc-css', get_template_directory_uri() .'/css/style_pc.css', array(), '1.0.0', 'screen and ( min-width:769px )');
    wp_enqueue_style('drawer-css', "https://cdnjs.cloudflare.com/ajax/libs/drawer/3.2.2/css/drawer.min.css");
    wp_enqueue_script('jquery', "https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js");
    wp_enqueue_script('iscroll', "https://cdnjs.cloudflare.com/ajax/libs/iScroll/5.2.0/iscroll.min.js");
    wp_enqueue_script('drawer-js', "https://cdnjs.cloudflare.com/ajax/libs/drawer/3.2.2/js/drawer.min.js");
    wp_enqueue_script('fadethis-js', get_template_directory_uri().'/js/jquery.fadethis.min.js');
    wp_enqueue_script('common-js', get_template_directory_uri() .'/js/common.js');
}
add_action('wp_enqueue_scripts', 'sakura_theme_link');

function sakura_theme_init() {
    register_post_type(
        'daily',[
            "labels" => [
                "name" => "日報"
            ],
            "public" => true,
            "menu_icon" => "dashicons-format-aside",
            "menu_position" => 3,
            'show_in_rest' => true,
            'has_archive' => true,
            'hierarchical' => true,
        ]);
};
add_action('init','sakura_theme_init');

?>