Simple Post Views Counter

add_action( 'template_redirect', function () {
    if ( ! is_singular( 'post' ) || is_preview() || current_user_can( 'edit_posts' ) ) {
        return;
    }

    $agent = isset( $_SERVER['HTTP_USER_AGENT'] ) ? strtolower( sanitize_text_field( wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) ) ) : '';

    if ( '' === $agent || preg_match( '/bot|crawl|spider|slurp|preview|monitor|facebookexternalhit/', $agent ) ) {
        return;
    }

    $post_id = get_queried_object_id();
    update_post_meta( $post_id, 'wpide_post_views', (int) get_post_meta( $post_id, 'wpide_post_views', true ) + 1 );
} );

add_shortcode( 'post_views', function ( $atts ) {
    $atts    = shortcode_atts( array( 'id' => 0 ), $atts, 'post_views' );
    $post_id = $atts['id'] ? absint( $atts['id'] ) : get_the_ID();

    return '<span class="wpide-post-views">' . esc_html( number_format_i18n( (int) get_post_meta( $post_id, 'wpide_post_views', true ) ) ) . '</span>';
} );

add_filter( 'manage_post_posts_columns', function ( $columns ) {
    $columns['wpide_views'] = 'Views';

    return $columns;
} );

add_action( 'manage_post_posts_custom_column', function ( $column, $post_id ) {
    if ( 'wpide_views' === $column ) {
        echo esc_html( number_format_i18n( (int) get_post_meta( $post_id, 'wpide_post_views', true ) ) );
    }
}, 10, 2 );