通常，您可以在注册操作后取消注册该操作的回调，然后在调用之前注册自己的回调do_action( \'...\' ).

下面是一个示例：

// Add your own with later priority, e.g. 11 or wrap it in another later hook:
add_action( \'amp_post_template_head\', \'wpse_amp_post_template_add_canonical\', 11 ); 

function wpse_amp_post_template_add_canonical( $amp_template ) 
{
    // Remove the unwanted callback:
    remove_action( \'amp_post_template_head\', \'amp_post_template_add_canonical\' );

    // Modify this new output to your needs:
    printf( 
        \'<link rel="canonical" href="%s" />\', 
         esc_url( $amp_template->get( \'canonical_url\' ) )
    );

}