dom - 如何否定xpath查询？

Question

我想做一个像这样的否定 xpath 查询：

$xpath->query(//a[DoesNotContain(@class,'some_class')]);

我知道这件事

$xpath->query(//a[contains(@class,'some_class')]);

Answer 1

$xpath->query(//a[not(contains(@class, 'some_class'))]);