mailferno-theme/functions.php

<?php

/* Add Dashicons in WordPress Front-end */
add_action('wp_enqueue_scripts', 'load_dashicons_front_end');
function load_dashicons_front_end()
{
    wp_enqueue_style('dashicons');
}

/**
 * Convert uploaded images to WebP with adjustable image compression quality
 */

// Register the settings on the Media Settings page
function add_optimize_images_settings()
{
    register_setting('media', 'optimize_images');
    register_setting('media', 'image_compression_quality');

    add_settings_field(
        'optimize_images',
        __('Optimize Images', 'textdomain'),
        'display_optimize_images_checkbox',
        'media',
        'default'
    );

    add_settings_field(
        'image_compression_quality',
        __('Image Compression Quality', 'textdomain'),
        'display_image_compression_quality_input',
        'media',
        'default'
    );
}

function display_optimize_images_checkbox()
{
    $option = get_option('optimize_images');
    ?>
    <input type="checkbox" name="optimize_images" value="1" <?php checked(1, $option, true); ?> />
    <label for="optimize_images"><?php esc_html_e('Convert images to WebP format upon upload.', 'textdomain'); ?></label>
    <?php
}

function display_image_compression_quality_input()
{
    $quality = get_option('image_compression_quality', 80);
    ?>
    <input type="number" name="image_compression_quality"
           value="<?php echo esc_attr($quality); ?>" min="1" max="100" />
    <label for="image_compression_quality"><?php esc_html_e('Set compression quality for WebP images (1-100).', 'textdomain'); ?></label>
    <?php
}

add_action('admin_init', 'add_optimize_images_settings');

function convert_images_to_webp($file)
{
    $optimize_images = get_option('optimize_images');
    if (!$optimize_images) {
        return $file;
    }

    if (!class_exists('Imagick')) {
        return $file;
    }

    $supported_types = ['image/jpeg', 'image/jpg', 'image/png'];

    if (!in_array($file['type'], $supported_types)) {
        return $file;
    }

    $wp_upload_dir = wp_upload_dir();
    $original_file_path = $file['file'];
    $file_name = pathinfo($original_file_path, PATHINFO_FILENAME);
    $webp_file_path = $wp_upload_dir['path'] . '/' . $file_name . '.webp';

    if (pathinfo($original_file_path, PATHINFO_EXTENSION) === 'webp') {
        return $file;
    }

    $compression_quality = get_option('image_compression_quality', 75);

    try {
        $image = new Imagick($original_file_path);

        $hasTransparency = $image->getImageAlphaChannel();
        if ($hasTransparency) {
            return $file;
        }

        $image->setImageFormat('webp');
        $image->setImageCompressionQuality($compression_quality);
        $image->stripImage();
        $image->writeImage($webp_file_path);
        $image->clear();
        $image->destroy();
    } catch (Exception $e) {
        return $file;
    }

    $backup_dir = $wp_upload_dir['path'] . '/backup';
    if (!file_exists($backup_dir)) {
        mkdir($backup_dir, 0755, true);
    }

    $backup_file_path = $backup_dir . '/' . basename($original_file_path);
    rename($original_file_path, $backup_file_path);

    $metadata = wp_generate_attachment_metadata(attachment_url_to_postid($file['url']), $webp_file_path);
    wp_update_attachment_metadata(attachment_url_to_postid($file['url']), $metadata);

    return [
        'file' => $webp_file_path,
        'url' => $wp_upload_dir['url'] . '/' . basename($webp_file_path),
        'type' => 'image/webp',
    ];
}

add_filter('wp_handle_upload', 'convert_images_to_webp');




// function rl_before_update( $upgrader_object, $options ) {
//     log_to_file("rl_before_update - Options: ", $options);
// }
    
// function rl_after_update( $upgrader_object, $options ) {
//     log_to_file("rl_after_update - Options: ", $options);
// }

// add_action( 'upgrader_pre_install', 'rl_before_update', 10, 2 );
// add_action( 'upgrader_process_complete', 'rl_after_update', 10, 2 );