キーワードクラウドを自動生成するWordPressプラグインを開発する方法

<?php
/**
 * Plugin Name: Keyword Cloud Generator
 * Plugin URI: https://yourwebsite.com/
 * Description: Generate keyword cloud for your blog posts.
 * Version: 1.0.0
 * Author: Your Name
 * Author URI: https://yourwebsite.com/
 * License: GPL2
 */

// When the plugin is activated
register_activation_hook(__FILE__, 'keyword_cloud_activation');

// When the plugin is deactivated
register_deactivation_hook(__FILE__, 'keyword_cloud_deactivation');

// Generate keyword cloud for a post
function generate_keyword_cloud($post_id) {
    // Retrieve post content
    $post = get_post($post_id);
    $post_content = $post->post_content;

    // Retrieve all words in post content
    $words = str_word_count($post_content, 1);

    // Count the frequency of each word
    $word_counts = array_count_values($words);

    // Sort the words by frequency
    arsort($word_counts);

    // Generate the keyword cloud
    echo '<div class="keyword-cloud">';
    foreach ($word_counts as $word => $count) {
        echo '<span style="font-size: ' . ($count * 10) . 'px;">' . $word . '</span> ';
    }
    echo '</div>';
}

// Function to be executed when the plugin is activated
function keyword_cloud_activation() {
    // Code to be executed when the plugin is activated
}

// Function to be executed when the plugin is deactivated
function keyword_cloud_deactivation() {
    // Code to be executed when the plugin is deactivated
}