How to extend product short description ?

add_filter('woocommerce_short_description', 'limit_product_short_description', 10, 1);
function limit_product_short_description($post_excerpt) {	
	$limit = 14;
	
	$pieces = explode(" ", $post_excerpt);
	$post_excerpt = implode(" ", array_splice($pieces, 0, $limit));
	
	return $post_excerpt;
}

explode breaks the original string into an array of words, array_splice lets you get certain ranges of those words, and then implode combines the ranges back together into single strings.

We haven’t heard back from you in a while, so I’m going to mark this as resolved. Feel free to start a new thread if you have any further questions!