Implement essential admin hooks settings features for WordPress.

wpessential_filter_hooks.php

<?php
/**
 * Plugin Name: WP Essential Filter Hooks
 * Description: Implement essential admin hooks settings features for WordPress.
 * Version: 1.0
 * Author: macto
 */

// Add "Duplicate" Button for Pages and Posts
function custom_duplicate_button($actions, $post) {
    if ($post->post_type == 'page' || $post->post_type == 'post') {
        $actions['duplicate'] = '<a href="' . admin_url('admin.php?action=custom_duplicate_post&post=' . $post->ID) . '">Duplicate</a>';
    }
    return $actions;
}
add_filter('post_row_actions', 'custom_duplicate_button', 10, 2);
add_filter('page_row_actions', 'custom_duplicate_button', 10, 2);

function custom_duplicate_post() {
    if (!isset($_GET['post']) || !isset($_GET['action']) || $_GET['action'] != 'custom_duplicate_post') {
        return;
    }

    $post_id = $_GET['post'];
    $post = get_post($post_id);

    if (!isset($post) || empty($post)) {
        return;
    }

    $post_content = $post->post_content;
    $post_title = $post->post_title;
    $post_status = $post->post_status;
    $post_type = $post->post_type;
    $post_author = $post->post_author;

    $duplicate_post = array(
        'post_title' => $post_title,
        'post_content' => $post_content,
        'post_status' => $post_status,
        'post_type' => $post_type,
        'post_author' => $post_author
    );

    $new_post_id = wp_insert_post($duplicate_post);

    if ($new_post_id) {
        wp_redirect(admin_url('post.php?post=' . $new_post_id . '&action=edit'));
        exit;
    }
}
add_action('admin_action_custom_duplicate_post', 'custom_duplicate_post');

// Add "Order" Column Header for Pages
function custom_order_column($columns) {
    // Inserting 'order' column after 'author' column
    $new_columns = array();
    foreach ($columns as $key => $value) {
        $new_columns[$key] = $value;
        if ($key === 'author') {
            $new_columns['order'] = 'Order';
        }
    }
    return $new_columns;
}
add_filter('manage_pages_columns', 'custom_order_column');

// Display the order value in the "Order" column
function custom_order_column_content($column_name, $post_id) {
    if ($column_name == 'order') {
        // $order = get_post_meta($post_id, 'menu_order', true);
        $order = get_post_field('menu_order', $post_id);
        echo $order;
    }
}
add_action('manage_pages_custom_column', 'custom_order_column_content', 10, 2);

// Make the "Order" column sortable
function custom_order_column_sortable($columns) {
    $columns['order'] = 'menu_order';
    return $columns;
}
add_filter('manage_edit-page_sortable_columns', 'custom_order_column_sortable');

// Modify the query to preserve hierarchical order when sorting by "Order" column
function custom_order_column_query($query) {
    if (!is_admin() || !$query->is_main_query()) {
        return;
    }

    $orderby = $query->get('orderby');

    if ($orderby === 'menu_order') {
        $query->set('orderby', 'menu_order ID');
    }
}
add_action('pre_get_posts', 'custom_order_column_query');

// Add hierarchical dashes to the title column when pages are sorted by menu_order
function custom_title_column($title, $post_id) {
    // Check if the current request is sorting by menu_order
    if (isset($_GET['orderby']) && $_GET['orderby'] === 'menu_order') {
        $depth = count(get_post_ancestors($post_id));
        $indent = '';

        for ($i = 0; $i < $depth; $i++) {
            $indent .= '&#8212; '; // Em dash used by WordPress for parent-child relationships
        }
        $title = $indent . $title;
    }

    return $title;
}
add_filter('the_title', 'custom_title_column', 10, 2);

// Adjust the width of the "Order" column
function custom_order_column_width() {
    echo '<style type="text/css">.column-order { width: 60px; }</style>';
}
add_action('admin_head', 'custom_order_column_width');

// Enqueue the custom block variation JavaScript file
function custom_enqueue_block_variation_script() {
    wp_enqueue_script(
        'custom-block-variation-script',
        plugins_url('custom-block-variation.js', __FILE__),
        array('wp-blocks')
    );
}
add_action('enqueue_block_editor_assets', 'custom_enqueue_block_variation_script');

function include_feature_image_caption($block_content, $block){
    if ( isset($block['attrs']['className']) && $block['attrs']['className'] === 'sotp-post-featured-image') {
        $caption = '<figcaption class="wp-element-caption" style="text-align:center;padding-top:0.5em;padding-bottom:1em;">' . get_the_post_thumbnail_caption() . '</figcaption>';
        $block_content = str_replace('</figure>', $caption . '</figure>', $block_content);
        return $block_content;
    }
    return $block_content;
}
add_filter( 'render_block_core/post-featured-image', 'include_feature_image_caption', 10, 2 );