WP Post Views for WPEngine - Count Post Views in WordPress without plugin

gistfile1.php

<?php

if ( ! defined("POST_VIEWS_KEY") ) {
    define("POST_VIEWS_KEY", "post_views_count");
}


// function to display number of posts.
function get_post_views( $post_id ){

    $count = get_post_meta($post_id, POST_VIEWS_KEY, true);
    if($count==''){
        delete_post_meta($post_id, POST_VIEWS_KEY);
        add_post_meta($post_id, POST_VIEWS_KEY, '0');
        return 0;
    }
    return $count;
}

// function to count views.
function update_post_views( $post_id ) {
    $count = get_post_views( $post_id );
    $count++;
    update_post_meta( $post_id, POST_VIEWS_KEY, $count );
}


// Add it to a column in WP-Admin
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 get_post_views(get_the_ID()) . __("Views");
    }
}

?>


<?php 
//usage

// To update view count:
update_post_views( $post->ID );
// To display view count:
$views = get_post_views( $post->ID );
printf( _n ( "%d View", "%d Views", $views), $views );
?>