//code lấy lượt xem

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 "01 lượt xem";

    }

    return $count.' lượt xem';

}




// code đếm lượt xem

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);

    }

}

  

// code hiển thị số lượt xem trong dashboard

add_filter('manage_posts_columns', 'posts_column_views');

add_action('manage_posts_custom_column', 'posts_custom_column_views',5,2);

function posts_column_views($defaults){

    $defaults['post_views'] = __('Views');

    return $defaults;

}

function posts_custom_column_views($column_name, $id){

    if($column_name === 'post_views'){

        echo getPostViews(get_the_ID());

    }

}

<?php setPostViews(get_the_ID()); ?>

<div id="wrap" class="clearfix">

<span class="luot-xem">

<?php echo getPostViews(get_the_ID()); ?> </span>

.luot-xem:before {

content: "\f06e";

    color: #f96e5b;

    display: inline-block;

    font-size: 14px;

    font-family: 'FontAwesome';

    margin: auto;

    padding: 5px;

}

span.luot-xem {

    color: #f96e5b;

}