Исправление rtxtxtrx, (текущая версия) :
PHP GD and WebP support:
Normal WebP (VP8): supported since PHP 5.4
Transparent WebP or alpha transparency (VP8X, VP8L): supported since PHP 7.0
Animated WebP (VP8X): not supported at all.
https://www.php.net/manual/en/function.imagecreatefromwebp.php#126269
Исходная версия rtxtxtrx, :
PHP GD and WebP support:
Normal WebP (VP8): supported since PHP 5.4 Transparent WebP or alpha transparency (VP8X, VP8L): supported since PHP 7.0 Animated WebP (VP8X): not supported at all.