1/**
 2* Convert Uploaded Images to WebP Format
 3*
 4* This snippet converts uploaded images (JPEG, PNG, GIF) to WebP format
 5* automatically in WordPress. Ideal for use in a theme's functions.php file,
 6* or with plugins like Code Snippets or WPCodeBox.
 7*
 8* @package WordPress_Custom_Functions
 9* @author Mark Harris
10* @link www.christchurchwebsolutions.co.uk
11*
12* Usage Instructions:
13* - Add this snippet to your theme's functions.php file, or add it as a new
14* snippet in Code Snippets or WPCodeBox.
15* - The snippet hooks into WordPress's image upload process and converts
16* uploaded images to the WebP format.
17*
18* Optional Configuration:
19* - By default, the original image file is deleted after conversion to WebP.
20* If you prefer to keep the original image file, simply comment out or remove
21* the line '@unlink( $file_path );' in the wpturbo_handle_upload_convert_to_webp function.
22* This will preserve the original uploaded image file alongside the WebP version.
23*/
24add_filter( 'wp_handle_upload', 'wpturbo_handle_upload_convert_to_webp' );
25function wpturbo_handle_upload_convert_to_webp( $upload ) {
26if ( $upload['type'] == 'image/jpeg' || $upload['type'] == 'image/png' || $upload['type'] == 'image/gif' ) {
27$file_path = $upload['file'];
28// Check if ImageMagick or GD is available
29if ( extension_loaded( 'imagick' ) || extension_loaded( 'gd' ) ) {
30$image_editor = wp_get_image_editor( $file_path );
31if ( ! is_wp_error( $image_editor ) ) {
32$file_info = pathinfo( $file_path );
33$dirname = $file_info['dirname'];
34$filename = $file_info['filename'];
35// Create a new file path for the WebP image
36$new_file_path = $dirname . '/' . $filename . '.webp';
37// Attempt to save the image in WebP format
38$saved_image = $image_editor->save( $new_file_path, 'image/webp' );
39if ( ! is_wp_error( $saved_image ) && file_exists( $saved_image['path'] ) ) {
40// Success: replace the uploaded image with the WebP image
41$upload['file'] = $saved_image['path'];
42$upload['url'] = str_replace( basename( $upload['url'] ), basename( $saved_image['path'] ), $upload['url'] );
43$upload['type'] = 'image/webp';
44// Optionally remove the original image
45@unlink( $file_path );
46}
47}
48}
49}
50return $upload;
51}