/functions.php

<?php
add_action( 'after_setup_theme', 'generic_setup' );

function generic_setup() {
  load_theme_textdomain( 'generic', get_template_directory() . '/languages' );
  add_theme_support( 'title-tag' );
  add_theme_support( 'automatic-feed-links' );
  add_theme_support( 'post-thumbnails' );
  add_theme_support( 'html5', array( 'search-form' ) );
  global $content_width;
  if ( ! isset( $content_width ) ) { $content_width = 1920; }
  register_nav_menus( array( 'main-menu' => esc_html__( 'Main Menu', 'generic' ) ) );
}
add_action( 'wp_enqueue_scripts', 'generic_load_scripts' );
function generic_load_scripts() {
  wp_enqueue_style( 'generic-style', get_stylesheet_uri() );
  wp_enqueue_script( 'jquery' );
  wp_register_script( 'generic-videos', get_template_directory_uri() . '/js/videos.js' );
  wp_enqueue_script( 'generic-videos' );
  wp_add_inline_script( 'generic-videos', 'jQuery(document).ready(function($){$("#wrapper").vids();});' );
}
add_action( 'wp_footer', 'generic_footer_scripts' );
function generic_footer_scripts() {
  ?>
  <script>
    jQuery(document).ready(function ($) {
    var deviceAgent = navigator.userAgent.toLowerCase();
    if (deviceAgent.match(/(iphone|ipod|ipad)/)) {
    $("html").addClass("ios");
    $("html").addClass("mobile");
    }
    if (navigator.userAgent.search("MSIE") >= 0) {
    $("html").addClass("ie");
    }
    else if (navigator.userAgent.search("Chrome") >= 0) {
    $("html").addClass("chrome");
    }
    else if (navigator.userAgent.search("Firefox") >= 0) {
    $("html").addClass("firefox");
    }
    else if (navigator.userAgent.search("Safari") >= 0 && navigator.userAgent.search("Chrome") < 0) {
    $("html").addClass("safari");
    }
    else if (navigator.userAgent.search("Opera") >= 0) {
    $("html").addClass("opera");
    }
    $(":checkbox").on("click", function () {
    $(this).parent().toggleClass("checked");
    });
    });
  </script>
  <?php
}
add_filter( 'document_title_separator', 'generic_document_title_separator' );
function generic_document_title_separator( $sep ) {
  $sep = '|';
  return $sep;
}
add_filter( 'the_title', 'generic_title' );
function generic_title( $title ) {
  if ( $title == '' ) {
  return '...';
  } else {
  return $title;
  }
}
add_filter( 'the_content_more_link', 'generic_read_more_link' );
function generic_read_more_link() {
  if ( ! is_admin() ) {
  return ' <a href="' . esc_url( get_permalink() ) . '" class="more-link">...</a>';
  }
}
add_filter( 'excerpt_more', 'generic_excerpt_read_more_link' );
function generic_excerpt_read_more_link( $more ) {
  if ( ! is_admin() ) {
  global $post;
  return ' <a href="' . esc_url( get_permalink( $post->ID ) ) . '" class="more-link">...</a>';
  }
}
add_filter( 'intermediate_image_sizes_advanced', 'generic_image_insert_override' );
function generic_image_insert_override( $sizes ) {
  unset( $sizes['medium_large'] );
  return $sizes;
}
add_action( 'widgets_init', 'generic_widgets_init' );
function generic_widgets_init() {
  register_sidebar( array(
  'name'          => esc_html__( 'Sidebar Widget Area', 'generic' ),
  'id'            => 'primary-widget-area',
  'before_widget' => '<li id="%1$s" class="widget-container %2$s">',
  'after_widget'  => '</li>',
  'before_title'  => '<h3 class="widget-title">',
  'after_title'   => '</h3>',
  ) );
}
add_action( 'wp_head', 'generic_pingback_header' );
function generic_pingback_header() {
  if ( is_singular() && pings_open() ) {
  printf( '<link rel="pingback" href="%s" />' . "\n", esc_url( get_bloginfo( 'pingback_url' ) ) );
  }
}
add_action( 'comment_form_before', 'generic_enqueue_comment_reply_script' );
function generic_enqueue_comment_reply_script() {
  if ( get_option( 'thread_comments' ) ) {
  wp_enqueue_script( 'comment-reply' );
  }
}
function generic_custom_pings( $comment ) {
?>
  <li <?php comment_class(); ?> id="li-comment-<?php comment_ID(); ?>"><?php echo comment_author_link(); ?></li>
  <?php
}
add_filter( 'get_comments_number', 'generic_comment_count', 0 );
function generic_comment_count( $count ) {
  if ( ! is_admin() ) {
  global $id;
  $get_comments     = get_comments( 'status=approve&post_id=' . $id );
  $comments_by_type = separate_comments( $get_comments );
  return count( $comments_by_type['comment'] );
  } else {
  return $count;
  }
}
function slider_widget() {
  register_sidebar(array(
      'name' => 'Slider-Widget',
      'id' => 'widget-slider',
      'before_widget' => '<div class="slider-widget">',
      'after_widget' => '</div>',
      'before_title' => '<h3 class="slider-widget-title">',
      'after_title' => '</h3>',
  ));
}
add_action('widgets_init', 'slider_widget');

function left_footer_widget() {
  register_sidebar(array(
    'name' => 'Left Footer',
    'id' => 'widget-footer-area-left',
    'before_widget' => '<div class="left-footer">',
    'after_widget' => '</div>',
    'before_title' => '<h3 class="footer-widget-title">',
    'after_title' => '</h3>',
  ));}
add_action('widgets_init', 'left_footer_widget');

function middle_footer_widget() {
    register_sidebar(array(
        'name' => 'Middle Footer',
        'id' => 'widget-footer-area-middle',
        'before_widget' => '<div class="middle-footer">',
        'after_widget' => '</div>',
        'before_title' => '<h3 class="footer-widget-title">',
        'after_title' => '</h3>',
    ));
}
add_action('widgets_init', 'middle_footer_widget');

function right_footer_widget() {
    register_sidebar(array(
        'name' => 'Right Footer',
        'id' => 'widget-footer-area-right',
        'before_widget' => '<div class="right-footer">',
        'after_widget' => '</div>',
        'before_title' => '<h3 class="footer-widget-title">',
        'after_title' => '</h3>',
    ));
}
add_action('widgets_init', 'right_footer_widget');