这

if( has_term( \'jazz\', \'genre\' ) ) {
    // do something
}

将检查帖子是否有术语jazz 来自自定义分类法genre. 但是如何检查帖子是否属于自定义分类法genre? 不管它有什么术语，只要它有genre 分类，它会检查。

就像这样，

if ( has_taxonomy(\'genre\') ) {
    // whether it\'s jazz, blues, rock and roll; doesn\'t matter as long as the post has any of them.
}

if( has_term( \'\', \'genre\' ) ) {
    // do something
}

if ( has_term(\'\', \'genre\') ) {
    // whether it\'s jazz, blues, rock and roll; doesn\'t matter as long as the post has any of them.
}