Wordpress Convert Image To WebP and Delete Original File On Upload

wpcitwebp.php

//Convert uploaded files to webp and delete uploaded file. Imagick needs to be enabled. This can be done via the php config settings in your servers control panel.

function compress_and_convert_images_to_webp($file) {
    // Check if file type is supported
    $supported_types = ['image/jpeg', 'image/jpg', 'image/png', 'image/webp'];
    if (!in_array($file['type'], $supported_types)) {
        return $file;
    }

    // Get the path to the upload directory
    $wp_upload_dir = wp_upload_dir();

    // Set up the file paths
    $old_file_path = $file['file'];
    $file_name = basename($file['file']);
    $webp_file_path = $wp_upload_dir['path'] . '/' . pathinfo($file_name, PATHINFO_FILENAME) . '.webp';

    // Check if file is already a WebP image
    if (pathinfo($old_file_path, PATHINFO_EXTENSION) === 'webp') {
        return $file;
    }

    // Load the image using Imagick
    $image = new Imagick($old_file_path);

    // Compress the image
    $quality = 75; // Adjust this value to control the compression level
    $image->setImageCompressionQuality($quality);
    $image->stripImage(); // Remove all profiles and comments to reduce file size

    // Convert the image to WebP
    $image->setImageFormat('webp');
    $image->setOption('webp:lossless', 'false');
    $image->setOption('webp:method', '6'); // Adjust this value to control the compression level for WebP
    $image->writeImage($webp_file_path);

    // Delete the old image file
    unlink($old_file_path);

    // Return the updated file information
    return [
        'file' => $webp_file_path,
        'url' => $wp_upload_dir['url'] . '/' . basename($webp_file_path),
        'type' => 'image/webp',
    ];
}
add_filter('wp_handle_upload', 'compress_and_convert_images_to_webp');