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Save images as WEBP
/**
* Convert Uploaded Images to WebP Format
*
* This snippet converts uploaded images (JPEG, PNG, GIF) to WebP format
* automatically in WordPress. Ideal for use in a theme's functions.php file,
* or with plugins like Code Snippets or WPCodeBox.
*
* @package WordPress_Custom_Functions
* @author Mark Harris
* @link http://www.christchurchwebsolutions.co.uk
*
* Usage Instructions:
* - Add this snippet to your theme's functions.php file, or add it as a new
* snippet in Code Snippets or WPCodeBox.
* - The snippet hooks into WordPress's image upload process and converts
* uploaded images to the WebP format.
*
* Optional Configuration:
* - By default, the original image file is deleted after conversion to WebP.
* If you prefer to keep the original image file, simply comment out or remove
* the line '@unlink( $file_path );' in the wpturbo_handle_upload_convert_to_webp function.
* This will preserve the original uploaded image file alongside the WebP version.
*/
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Does this remove metadata too?
Warning: The above code overwrites already existing image files with the new uploaded one if multiple files with the same filename are uploaded to the library within the same month. A check for an already existing webp filename and appending something to the filename before writing the new file into the directory is missing.
Here is our working version that takes this into account:
add_filter( ‘wp_handle_upload’, ‘wpturbo_handle_upload_convert_to_webp’ );
function wpturbo_handle_upload_convert_to_webp( $upload ) {
if ( $upload[‘type’] == ‘image/jpeg’ || $upload[‘type’] == ‘image/png’ || $upload[‘type’] == ‘image/gif’ ) {
$file_path = $upload[‘file’];
// Check if ImageMagick or GD is available
if ( extension_loaded( ‘imagick’ ) || extension_loaded( ‘gd’ ) ) {
$image_editor = wp_get_image_editor( $file_path );
if ( ! is_wp_error( $image_editor ) ) {
$file_info = pathinfo( $file_path );
$dirname = $file_info[‘dirname’];
$filename = $file_info[‘filename’];
// Create a new file path for the WebP image
$new_file_path = $dirname . ‘/’ . $filename . ‘.webp’;
// Check if new WebP filename already exists and if so append -1…n to filename
$counter=1;
$new_filename=”;
while(file_exists($new_file_path)) {
$new_filename = $filename . ‘-‘ . ($counter);
$new_file_path = $dirname . ‘/’ . $new_filename . ‘.webp’;
$counter++;
}
// Attempt to save the image in WebP format
$saved_image = $image_editor->save( $new_file_path, ‘image/webp’ );
if ( ! is_wp_error( $saved_image ) && file_exists( $saved_image[‘path’] ) ) {
// Success: replace the uploaded image with the WebP image
$upload[‘file’] = $saved_image[‘path’];
$upload[‘url’] = str_replace( basename( $upload[‘url’] ), basename( $saved_image[‘path’] ), $upload[‘url’] );
$upload[‘type’] = ‘image/webp’;
// Optionally remove the original image
@unlink( $file_path );
}
}
}
}
return $upload;
}