您可以尝试使用自定义元字段来实现这一点。在里面functions.php 请填写以下内容：

// add the tracker in your header by using wp_footer hook
function is_viewed ($post_id) {

    if ( !is_single() ) return;


/*

At times queries performed in other templates such as sidebar.php may corrupt certain conditional tags. 
For instance, in header.php a conditional tag works properly but doesn\'t work in a theme\'s footer.php.
The trick is to put wp_reset_query before the conditional test in the footer.
https://codex.wordpress.org/Conditional_Tags#In_a_theme.27s_footer.php_file

*/
    wp_reset_query();

    if ( empty ( $post_id) ) {
        global $post;
        $post_id = $post->ID;
    }

    if ( !has_views($post_id) ){

        // This post is visited for the first time

        // add post meta to mark this post as viewed
        add_post_meta($post_id,\'viewed\', "YES", true);
     }
}
add_action( \'wp_footer\', \'is_viewed\');

function has_views($post_id){
  if (!get_post_meta($post_id,\'viewed\',true)) return false;
  else return true;
}