mike17

$content =
        preg_replace(
            array('{<a(.*?)(wp-att|wp-content\/uploads)[^>]*><img}',
                '{ wp-image-[0-9]*" /></a>}'),
            array('<img','" />'),
            $content
        );

$content = preg_replace('~(<a\b[^>]*>)?<img[^>]*>(</a>)?~i', '', $content);