如果你想修改提要，你应该钩住WordPress对每个页面请求所做的主查询。这里最好的钩子是pre_get_posts. 此代码示例将连接到pre_get_posts, 检查是否为提要，并添加post格式分类查询：

add_action( \'pre_get_posts\', \'wpse18412_pre_get_posts\' );
function wpse18412_pre_get_posts( &$wp_query )
{
    if ( $wp_query->is_feed() ) {
        $post_format_tax_query = array(
            \'taxonomy\' => \'post_format\',
            \'field\' => \'slug\',
            \'terms\' => \'post-format-image\', // Change this to the format you want to exclude
            \'operator\' => \'NOT IN\'
        );
        $tax_query = $wp_query->get( \'tax_query\' );
        if ( is_array( $tax_query ) ) {
            $tax_query = $tax_query + $post_format_tax_query;
        } else {
            $tax_query = array( $post_format_tax_query );
        }
        $wp_query->set( \'tax_query\', $tax_query );
    }
}