如何在单页上显示帖子视图。php？我尝试的内容：

function getPostViews($postID){
    $count_key = \'post_views_count\';
    $count = get_post_meta($postID, $count_key, true);
    if($count==\'\'){
        delete_post_meta($postID, $count_key);
        add_post_meta($postID, $count_key, \'0\');
        return "0 View";
    }
    return $count.\' Views\';
}
function setPostViews($postID) {
    $count_key = \'post_views_count\';
    $count = get_post_meta($postID, $count_key, true);
    if($count==\'\'){
        $count = 0;
        delete_post_meta($postID, $count_key);
        add_post_meta($postID, $count_key, \'0\');
    }else{
        $count++;
        update_post_meta($postID, $count_key, $count);
    }
}
// Remove issues with prefetching adding extra views
remove_action( \'wp_head\', \'adjacent_posts_rel_link_wp_head\', 10, 0);

它工作得很好，可以统计浏览量，但每次即使只有一个查看器一次又一次刷新页面，它也会统计浏览量。我想玩会话cookie，但不知道如何实现。我试图实现的是用以下函数替换第二个函数：

function setPostViews($postID) {
$count_key = \'post_views_count\';
$count = get_post_meta($postID, $count_key, true);
if($count==\'\'){
$count = 0;
delete_post_meta($postID, $count_key);
add_post_meta($postID, $count_key, \'0\');
}else{

/*
* Check the cookie is exist or not.
* If not the set cookie for some time interval and
* increase the count
*/
if(!isset($_COOKIE[\'wpai_visited_ip\']))

$count++;
update_post_meta($postID, $count_key, $count);

// Get IP address
$visit_ip_addr = $_SERVER[\'REMOTE_ADDR\'];

// Set the cookie
setcookie(\'wpai_visited_ip\', $visit_ip_addr, time()+ (60 * 1));

}
}

但它不起作用，我得到以下错误：

无法修改标题信息-标题已由C:\\xampp\\htdocs\\portfolio\\wp includes\\class.wp style.php:287）在C:\\xampp\\htdocs\\portfolio\\wp content\\themes\\portfolio\\breadcrumb中发送。php在线152

如果有人能帮我，请帮忙。当新用户在单个会话中查看我的帖子时，我只需要增加视图计数器。

<?php
//...inside your functions.php...

add_action( \'init\', \'fa_setpostviews\' );
function fa_setpostviews() {
    global $post;

    // Do not continue if we do not have a post ID
    if ( ! isset( $post->ID ) ) {
        return;
    }

    // Do not continue if the user is not logged in
    if ( ! is_user_logged_in() ) {
        return;
    }

    // Make sure the user is on a single post.
    if ( ! is_single() ) {
        return;
    }

    /*
     * Note! The above if statements could be combined into one.
     */

    $postID = $post->ID;

    $count_key = \'post_views_count\';
    $count     = get_post_meta( $postID, $count_key, true );
    if ( $count == \'\' ) {
        $count = 0;
        delete_post_meta( $postID, $count_key );
        add_post_meta( $postID, $count_key, \'0\' );
    } else {
        if ( ! isset( $_COOKIE[\'wpai_visited_ip\'] ) ) {
            $count ++;
        }

        update_post_meta( $postID, $count_key, $count );

        $visit_ip_addr = $_SERVER[\'REMOTE_ADDR\'];
        setcookie( \'wpai_visited_ip\', $visit_ip_addr, time() + ( 60 * 1 ) );

    }
}