Disable Divi Image Generation

                        /**
 * Create a custom settings page for Divi Image Sizes.
 */
function mytheme_add_settings_page() {
    add_options_page(
        'Divi Image Sizes',        // Page title
        'Divi Image Sizes',        // Menu title
        'manage_options',          // Capability
        'divi-image-sizes',        // Menu slug
        'mytheme_render_settings_page' // Callback function
    );
}
add_action( 'admin_menu', 'mytheme_add_settings_page' );

/**
 * Render the settings page content with branding and promotional message.
 */
function mytheme_render_settings_page() {
    ?>
    <div class="wrap">
        <h1><?php esc_html_e( 'Divi Image Sizes', 'mytheme' ); ?></h1>
        
        <!-- Info Box Start -->
        <div class="de-info-box" style="border: 1px solid #ccd0d4; background-color: #f1f1f1; padding: 15px; margin-bottom: 20px; display: flex; align-items: center;">
            <img src="https://diviengine.com/wp-content/uploads/2023/12/logo.png" alt="Divi Engine Logo" style="max-width: 150px; height: auto; margin-right: 20px;">
            <p style="margin: 0; font-size: 14px; color: #23282d;">
                <?php esc_html_e( 'Get 10% off any plugin or All-Access Pass with the coupon code ', 'mytheme' ); ?>
                <strong>snippetengine</strong>
                <?php esc_html_e( ' at ', 'mytheme' ); ?>
                <a href="https://diviengine.com" target="_blank" style="color: #0073aa; text-decoration: none;"><?php esc_html_e( 'diviengine.com', 'mytheme' ); ?></a>.
            </p>
        </div>
        <!-- Info Box End -->
        
        <form method="post" action="options.php">
            <?php
                settings_fields( 'mytheme_settings_group' );
                do_settings_sections( 'divi-image-sizes' );
                submit_button();
            ?>
        </form>
    </div>
    <?php
}

/**
 * Register settings, sections, and fields.
 */
function mytheme_register_settings() {
    register_setting(
        'mytheme_settings_group',  // Option group
        'disable_divi_image_sizes' // Option name
    );

    add_settings_section(
        'mytheme_settings_section',           // ID
        __( 'Divi Image Size Settings', 'mytheme' ), // Title
        null,                                 // Callback
        'divi-image-sizes'                    // Page
    );

    add_settings_field(
        'disable_divi_image_sizes',                // ID
        __( 'Disable Divi Image Size Generation', 'mytheme' ), // Title
        'mytheme_disable_divi_image_sizes_callback', // Callback
        'divi-image-sizes',                        // Page
        'mytheme_settings_section'                 // Section
    );
}
add_action( 'admin_init', 'mytheme_register_settings' );

/**
 * Callback function to render the checkbox field.
 */
function mytheme_disable_divi_image_sizes_callback() {
    $option = get_option( 'disable_divi_image_sizes' );
    ?>
    <input type="checkbox" name="disable_divi_image_sizes" value="1" <?php checked( 1, $option, true ); ?> />
    <label for="disable_divi_image_sizes"><?php _e( 'Check to disable Divi image sizes', 'mytheme' ); ?></label>
    <?php
}

/**
 * Disable Divi image sizes based on the settings page option.
 */
function disable_divi_image_sizes() {
    if ( get_option( 'disable_divi_image_sizes' ) ) {
        // Remove all image sizes registered by Divi
        remove_image_size( 'et-pb-post-main-image' );
        remove_image_size( 'et-pb-portfolio-image' );
        remove_image_size( 'et-pb-portfolio-module-image' );
        remove_image_size( 'et-pb-gallery-module-image' );
        remove_image_size( 'et-pb-fullwidth-image' );
    }
}
add_action( 'after_setup_theme', 'disable_divi_image_sizes' );

/**
 * Disable WordPress intermediate image sizes based on the settings page option.
 */
function remove_default_image_sizes( $sizes ) {
    if ( get_option( 'disable_divi_image_sizes' ) ) {
        return array();
    }
    return $sizes;
}
add_filter( 'intermediate_image_sizes_advanced', 'remove_default_image_sizes' );