<?php

add_action( 'wp_enqueue_scripts', 'my_theme_enqueue_styles' );

function my_theme_enqueue_styles() {

    $parent_style = 'twentynineteen-style';

    wp_enqueue_style( $parent_style, get_template_directory_uri() . '/style.css' );

    wp_enqueue_style( 'twentynineteen-child-style',

        array( $parent_style ),

        wp_get_theme()->get('Version')

    );

}

/**

 * Disable the emoji's

 * from https://wordpress.org/plugins/disable-emojis/

 */

function disable_emojis() {

    remove_action( 'wp_head', 'print_emoji_detection_script', 7 );

    remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );

    remove_action( 'wp_print_styles', 'print_emoji_styles' );

    remove_action( 'admin_print_styles', 'print_emoji_styles' );

    remove_filter( 'the_content_feed', 'wp_staticize_emoji' );

    remove_filter( 'comment_text_rss', 'wp_staticize_emoji' );

    remove_filter( 'wp_mail', 'wp_staticize_emoji_for_email' );

    add_filter( 'tiny_mce_plugins', 'disable_emojis_tinymce' );

    add_filter( 'wp_resource_hints', 'disable_emojis_remove_dns_prefetch', 10, 2 );

}

add_action( 'init', 'disable_emojis' );

/**

 * Filter function used to remove the tinymce emoji plugin.

 * 

 * @param    array  $plugins  

 * @return   array  Difference betwen the two arrays

 */

function disable_emojis_tinymce( $plugins ) {

    if ( is_array( $plugins ) ) {

        return array_diff( $plugins, array( 'wpemoji' ) );

    } else {

        return array();

    }

}

/**

 * Remove emoji CDN hostname from DNS prefetching hints.

 *

 * @param  array  $urls          URLs to print for resource hints.

 * @param  string $relation_type The relation type the URLs are printed for.

 * @return array                 Difference betwen the two arrays.

 */

function disable_emojis_remove_dns_prefetch( $urls, $relation_type ) {

    if ( 'dns-prefetch' == $relation_type ) {

        // Strip out any URLs referencing the WordPress.org emoji location

        $emoji_svg_url_bit = 'https://s.w.org/images/core/emoji/';

        foreach ( $urls as $key => $url ) {

            if ( strpos( $url, $emoji_svg_url_bit ) !== false ) {

                unset( $urls[$key] );

            }

        }

    }

    return $urls;

}