functions.php

<?php
function my_theme_enqueue_styles() {

    $parent_style = 'parent-style'; // This is 'twentyfifteen-style' for the Twenty Fifteen theme.

    wp_enqueue_style( $parent_style, get_template_directory_uri() . '/style.css' );
    wp_enqueue_style( 'child-style',
        get_stylesheet_directory_uri() . '/style.css',
        array( $parent_style ),
        wp_get_theme()->get('Version')
    );
}
add_action( 'wp_enqueue_scripts', 'my_theme_enqueue_styles' );
?>

<?php
/**
 * Misty Lake functions and definitions
 *
 * @package Misty Lake
 * @since Misty Lake 1.0
 */

/**
 * Set the content width based on the theme's design and stylesheet.
 *
 * @since Misty Lake 1.0
 */
if ( ! isset( $content_width ) )
    $content_width = 660; /* pixels */

/**
 * Adjust the content width for Full Width page template.
 */
function mistylake_set_content_width() {
    global $content_width;

    if ( is_page_template( 'page-full-width.php' ) )
        $content_width = 878;
}
add_action( 'template_redirect', 'mistylake_set_content_width' );

if ( ! function_exists( 'mistylake_setup' ) ) :
/**
 * Sets up theme defaults and registers support for various WordPress features.
 *
 * Note that this function is hooked into the after_setup_theme hook, which runs
 * before the init hook. The init hook is too late for some features, such as indicating
 * support post thumbnails.
 *
 * @since Misty Lake 1.0
 */
function mistylake_setup() {

    /**
     * Make theme available for translation
     * Translations can be filed in the /languages/ directory
     * If you're building a theme based on Misty Lake, use a find and replace
     * to change 'mistylake' to the name of your theme in all the template files
     */
    load_theme_textdomain( 'mistylake', get_template_directory() . '/languages' );

    /**
     * Add default posts and comments RSS feed links to head
     */
    add_theme_support( 'automatic-feed-links' );

    /*
     * Let WordPress manage the document title.
     * By adding theme support, we declare that this theme does not use a
     * hard-coded <title> tag in the document head, and expect WordPress to
     * provide it for us.
     *
     * @since Misty Lake 1.2.1
     */
    add_theme_support( 'title-tag' );

    /**
     * Enable support for Post Thumbnails
     */
    add_theme_support( 'post-thumbnails' );
    add_image_size( 'mistylake-thumbnail', '619', '9999' );

    /**
     * This theme uses wp_nav_menu() in one location.
     */
    register_nav_menus( array(
        'primary' => __( 'Primary Menu', 'mistylake' ),
    ) );

    /**
     * Add support for custom backgrounds
     */
    add_theme_support( 'custom-background' );

    /**
     * Add support for required post formats
     */
    add_theme_support( 'post-formats', array( 'aside', 'image', 'video', 'quote', 'link' ) );
}
endif; // mistylake_setup
add_action( 'after_setup_theme', 'mistylake_setup' );


/**
 * Enqueue Google Fonts
 */

function mistylake_fonts() {

    /* translators: If there are characters in your language that are not supported
       by Open Sans, translate this to 'off'. Do not translate into your own language. */
    if ( 'off' !== _x( 'on', 'Open Sans font: on or off', 'mistylake' ) ) {

        $opensans_subsets = 'latin,latin-ext';

        /* translators: To add an additional Open Sans character subset specific to your language, translate
           this to 'greek', 'cyrillic' or 'vietnamese'. Do not translate into your own language. */
        $opensans_subset = _x( 'no-subset', 'Open Sans font: add new subset (greek, cyrillic, vietnamese)', 'mistylake' );

        if ( 'cyrillic' == $opensans_subset )
            $opensans_subsets .= ',cyrillic,cyrillic-ext';
        elseif ( 'greek' == $opensans_subset )
            $opensans_subsets .= ',greek,greek-ext';
        elseif ( 'vietnamese' == $opensans_subset )
            $opensans_subsets .= ',vietnamese';

        $opensans_query_args = array(
            'family' => 'Open+Sans:300,300italic,400,400italic,600,600italic,700,700italic',
            'subset' => $opensans_subsets,
        );
        wp_register_style( 'mistylake-open-sans', add_query_arg( $opensans_query_args, "https://fonts.googleapis.com/css" ), array(), null );
    }



    /* translators: If there are characters in your language that are not supported
       by Droid Serif, translate this to 'off'. Do not translate into your own language. */
    if ( 'off' !== _x( 'on', 'Droid Serif font: on or off', 'mistylake' ) )
        wp_register_style( 'mistylake-droid-serif', "https://fonts.googleapis.com/css?family=Droid+Serif:400,400italic,400bold&subset=latin" );
}
add_action( 'init', 'mistylake_fonts' );

/**
 * Enqueue font styles in custom header admin
 */

function mistylake_admin_fonts() {
    wp_enqueue_style( 'mistylake-open-sans' );
    wp_enqueue_style( 'mistylake-droid-serif' );

}
add_action( 'admin_print_styles-appearance_page_custom-header', 'mistylake_admin_fonts' );

/**
 * Register widgetized area and update sidebar with default widgets
 *
 * @since Misty Lake 1.0
 */
function mistylake_widgets_init() {
    register_sidebar( array(
        'name'          => __( 'Sidebar', 'mistylake' ),
        'id'            => 'sidebar-1',
        'before_widget' => '<aside id="%1$s" class="widget %2$s">',
        'after_widget'  => '</aside>',
        'before_title'  => '<h1 class="widget-title">',
        'after_title'   => '</h1>',
    ) );
}
add_action( 'widgets_init', 'mistylake_widgets_init' );

/**
 * Enqueue scripts and styles
 */
function mistylake_scripts() {
    global $wp_styles;

    wp_enqueue_style( 'mistylake', get_stylesheet_uri() );

    wp_enqueue_style( 'mistylake-ie', get_template_directory_uri() . '/ie.css', array( 'mistylake' ) );
    $wp_styles->add_data( 'mistylake-ie', 'conditional', 'IE 8' );

    wp_enqueue_script( 'mistylake-small-menu', get_template_directory_uri() . '/js/small-menu.js', array( 'jquery' ), '20120206', true );

    if ( is_singular() && comments_open() && get_option( 'thread_comments' ) )
        wp_enqueue_script( 'comment-reply' );

    wp_enqueue_style( 'mistylake-open-sans' );
    wp_enqueue_style( 'mistylake-droid-serif' );

    if ( is_singular() && wp_attachment_is_image() )
        wp_enqueue_script( 'mistylake-keyboard-image-navigation', get_template_directory_uri() . '/js/keyboard-image-navigation.js', array( 'jquery' ), '20120202' );
}
add_action( 'wp_enqueue_scripts', 'mistylake_scripts' );

/**
 * Add theme options in the Customizer
 */

function mistylake_customize( $wp_customize ) {

    $wp_customize->add_section( 'mistylake_settings', array(
        'title'    => __( 'Theme Options', 'mistylake' ),
        'priority' => 35,
    ) );

    $wp_customize->add_setting( 'mistylake_show_subpages', array(
        'default'           => '',
        'sanitize_callback' => 'mistylake_sanitize_checkbox',
    ) );

    $wp_customize->add_control( 'mistylake_show_subpages', array(
        'label'    => __( 'Show list of subpages below content on Parent Pages', 'mistylake' ),
        'section'  => 'mistylake_settings',
        'settings' => 'mistylake_show_subpages',
        'type'     => 'checkbox',
        'choices'  => array(
            'yes' => 'Yes',
        ),
    ) );
}
add_action( 'customize_register', 'mistylake_customize' );

if ( ! function_exists( 'mistylake_sanitize_checkbox' ) ) :
/**
 * Sanitize a checkbox setting.
 *
 * @since Misty lake 1.2.1
 */
function mistylake_sanitize_checkbox( $value ) {
    return ( 1 == $value ) ? 1 : '';
}
endif;

/**
 * Implement the Custom Header feature.
 */
require get_template_directory() . '/inc/custom-header.php';

/**
 * Custom template tags for this theme.
 */
require get_template_directory() . '/inc/template-tags.php';

/**
 * Custom functions that act independently of the theme templates
 */
require get_template_directory() . '/inc/extras.php';

/**
 * Custom functions for Jetpack.
 */
require get_template_directory() . '/inc/jetpack.php';

/**
 * Customizer support
 */
require get_template_directory() . '/inc/customizer.php';