dkvdm/libcleanup.php

## libcleanup.php
<?php

/**
 * Redirects search results from /?s=query to /search/query/, converts %20 to +
 *
 * @link http://txfx.net/wordpress-plugins/nice-search/
 */
function roots_nice_search_redirect() {
  if (is_search() && strpos($_SERVER['REQUEST_URI'], '/wp-admin/') === false && strpos($_SERVER['REQUEST_URI'], '/search/') === false) {
    wp_redirect(home_url('/search/' . str_replace(array(' ', '%20'), array('+', '+'), urlencode(get_query_var('s')))), 301);
    exit();
  }
}

add_action('template_redirect', 'roots_nice_search_redirect');

/**
 * Fix for get_search_query() returning +'s between search terms
 */
function roots_search_query($escaped = true) {
  $query = apply_filters('roots_search_query', get_query_var('s'));

  if ($escaped) {
    $query = esc_attr($query);
  }

  return urldecode($query);
}

add_filter('get_search_query', 'roots_search_query');

/**
 * Fix for empty search queries redirecting to home page
 *
 * @link http://wordpress.org/support/topic/blank-search-sends-you-to-the-homepage#post-1772565
 * @link http://core.trac.wordpress.org/ticket/11330
 */
function roots_request_filter($query_vars) {
  if (isset($_GET['s']) && empty($_GET['s'])) {
    $query_vars['s'] = ' ';
  }

  return $query_vars;
}

add_filter('request', 'roots_request_filter');

/**
 * Root relative URLs
 *
 * WordPress likes to use absolute URLs on everything - let's clean that up.
 * Inspired by http://www.456bereastreet.com/archive/201010/how_to_make_wordpress_urls_root_relative/
 *
 * You can enable/disable this feature in config.php:
 * current_theme_supports('root-relative-urls');
 *
 * @author Scott Walkinshaw <scott.walkinshaw@gmail.com>
 */
function roots_root_relative_url($input) {
  $output = preg_replace_callback(
    '!(https?://[^/|"]+)([^"]+)?!',
    create_function(
      '$matches',
      // If full URL is home_url("/") and this isn't a subdir install, return a slash for relative root
      'if (isset($matches[0]) && $matches[0] === home_url("/") && str_replace("http://", "", home_url("/", "http"))==$_SERVER["HTTP_HOST"]) { return "/";' .
      // If domain is equal to home_url("/"), then make URL relative
      '} elseif (isset($matches[0]) && strpos($matches[0], home_url("/")) !== false) { return $matches[2];' .
      // If domain is not equal to home_url("/"), do not make external link relative
      '} else { return $matches[0]; };'
    ),
    $input
  );

  return $output;
}

/**
 * Terrible workaround to remove the duplicate subfolder in the src of <script> and <link> tags
 * Example: /subfolder/subfolder/css/style.css
 */
function roots_fix_duplicate_subfolder_urls($input) {
  $output = roots_root_relative_url($input);
  preg_match_all('!([^/]+)/([^/]+)!', $output, $matches);

  if (isset($matches[1]) && isset($matches[2])) {
    if ($matches[1][0] === $matches[2][0]) {
      $output = substr($output, strlen($matches[1][0]) + 1);
    }
  }

  return $output;
}

function enable_root_relative_urls() {
  return !(is_admin() && in_array($GLOBALS['pagenow'], array('wp-login.php', 'wp-register.php'))) && current_theme_supports('root-relative-urls');
}

if (enable_root_relative_urls()) {
  $root_rel_filters = array(
    'bloginfo_url',
    'theme_root_uri',
    'stylesheet_directory_uri',
    'template_directory_uri',
    'plugins_url',
    'the_permalink',
    'wp_list_pages',
    'wp_list_categories',
    'wp_nav_menu',
    'the_content_more_link',
    'the_tags',
    'get_pagenum_link',
    'get_comment_link',
    'month_link',
    'day_link',
    'year_link',
    'tag_link',
    'the_author_posts_link'
  );

  add_filters($root_rel_filters, 'roots_root_relative_url');

  add_filter('script_loader_src', 'roots_fix_duplicate_subfolder_urls');
  add_filter('style_loader_src', 'roots_fix_duplicate_subfolder_urls');
}

/**
 * Cleanup language_attributes() used in <html> tag
 *
 * Change lang="en-US" to lang="en"
 * Remove dir="ltr"
 */
function roots_language_attributes() {
  $attributes = array();
  $output = '';

  if (function_exists('is_rtl')) {
    if (is_rtl() == 'rtl') {
      $attributes[] = 'dir="rtl"';
    }
  }

  $lang = get_bloginfo('language');

  if ($lang && $lang !== 'en-US') {
    $attributes[] = "lang=\"$lang\"";
  } else {
    $attributes[] = 'lang="en"';
  }

  $output = implode(' ', $attributes);
  $output = apply_filters('roots_language_attributes', $output);

  return $output;
}

add_filter('language_attributes', 'roots_language_attributes');

/**
 * Remove the WordPress version from RSS feeds
 */
function roots_remove_generator() { return; }

add_filter('the_generator', 'roots_remove_generator');

/**
 * Cleanup wp_head()
 *
 * Remove unnecessary <link>'s
 * Remove inline CSS used by Recent Comments widget
 * Remove inline CSS used by posts with galleries
 * Remove self-closing tag and change ''s to "'s on rel_canonical()
 */
function roots_head_cleanup() {
  // http://wpengineer.com/1438/wordpress-header/
  remove_action('wp_head', 'feed_links', 2);
  remove_action('wp_head', 'feed_links_extra', 3);
  remove_action('wp_head', 'rsd_link');
  remove_action('wp_head', 'wlwmanifest_link');
  remove_action('wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0);
  remove_action('wp_head', 'wp_generator');
  remove_action('wp_head', 'wp_shortlink_wp_head', 10, 0);

  add_action('wp_head', 'roots_remove_recent_comments_style', 1);
  add_filter('use_default_gallery_style', '__return_null');

  if (!class_exists('WPSEO_Frontend')) {
    remove_action('wp_head', 'rel_canonical');
    add_action('wp_head', 'roots_rel_canonical');
  }
}

function roots_rel_canonical() {
  global $wp_the_query;

  if (!is_singular()) {
    return;
  }

  if (!$id = $wp_the_query->get_queried_object_id()) {
    return;
  }

  $link = get_permalink($id);
  echo "\t<link rel=\"canonical\" href=\"$link\">\n";
}

function roots_remove_recent_comments_style() {
  global $wp_widget_factory;

  if (isset($wp_widget_factory->widgets['WP_Widget_Recent_Comments'])) {
    remove_action('wp_head', array($wp_widget_factory->widgets['WP_Widget_Recent_Comments'], 'recent_comments_style'));
  }
}

add_action('init', 'roots_head_cleanup');

/**
 * Cleanup gallery_shortcode()
 *
 * Re-create the [gallery] shortcode and use thumbnails styling from Bootstrap
 *
 * @link http://twitter.github.com/bootstrap/components.html#thumbnails
 */
function roots_gallery($attr) {
  global $post, $wp_locale;

  static $instance = 0;
  $instance++;

  $output = apply_filters('post_gallery', '', $attr);

  if ($output != '') {
    return $output;
  }

  if (isset($attr['orderby'])) {
    $attr['orderby'] = sanitize_sql_orderby($attr['orderby']);
    if (!$attr['orderby']) {
      unset($attr['orderby']);
    }
  }

  extract(shortcode_atts(array(
    'order'      => 'ASC',
    'orderby'    => 'menu_order ID',
    'id'         => $post->ID,
    'icontag'    => 'li',
    'captiontag' => 'p',
    'columns'    => 3,
    'size'       => 'thumbnail',
    'include'    => '',
    'exclude'    => ''
  ), $attr));

  $id = intval($id);

  if ($order === 'RAND') {
    $orderby = 'none';
  }

  if (!empty($include)) {
    $include = preg_replace( '/[^0-9,]+/', '', $include );
    $_attachments = get_posts( array('include' => $include, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby) );

    $attachments = array();
    foreach ($_attachments as $key => $val) {
      $attachments[$val->ID] = $_attachments[$key];
    }
  } elseif (!empty($exclude)) {
    $exclude = preg_replace('/[^0-9,]+/', '', $exclude);
    $attachments = get_children(array('post_parent' => $id, 'exclude' => $exclude, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby));
  } else {
    $attachments = get_children(array('post_parent' => $id, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby));
  }

  if (empty($attachments)) {
    return '';
  }

  if (is_feed()) {
    $output = "\n";
    foreach ($attachments as $att_id => $attachment)
      $output .= wp_get_attachment_link($att_id, $size, true) . "\n";
    return $output;
  }

  $captiontag = tag_escape($captiontag);
  $columns    = intval($columns);
  $itemwidth  = $columns > 0 ? floor(100/$columns) : 100;
  $float      = is_rtl() ? 'right' : 'left';
  $selector   = "gallery-{$instance}";

  $gallery_style = $gallery_div = '';

  if (apply_filters('use_default_gallery_style', true)) {
    $gallery_style = '';
  }

  $size_class  = sanitize_html_class($size);
  $gallery_div = "<ul id='$selector' class='thumbnails gallery galleryid-{$id} gallery-columns-{$columns} gallery-size-{$size_class}'>";
  $output      = apply_filters('gallery_style', $gallery_style . "\n\t\t" . $gallery_div);

  $i = 0;
  foreach ($attachments as $id => $attachment) {
    $link = isset($attr['link']) && 'file' == $attr['link'] ? wp_get_attachment_link($id, $size, false, false) : wp_get_attachment_link($id, $size, true, false);

    $output .= "
      <{$icontag} class=\"gallery-item\">
        $link
      ";
    if ($captiontag && trim($attachment->post_excerpt)) {
      $output .= "
        <{$captiontag} class=\"gallery-caption hidden\">
        " . wptexturize($attachment->post_excerpt) . "
        </{$captiontag}>";
    }
    $output .= "</{$icontag}>";
    if ($columns > 0 && ++$i % $columns == 0) {
      $output .= '';
    }
  }

  $output .= "</ul>\n";

  return $output;
}

remove_shortcode('gallery');
add_shortcode('gallery', 'roots_gallery');

/**
 * Add class="thumbnail" to attachment items
 */
function roots_attachment_link_class($html) {
  $postid = get_the_ID();
  $html = str_replace('<a', '<a class="thumbnail"', $html);
  return $html;
}

add_filter('wp_get_attachment_link', 'roots_attachment_link_class', 10, 1);

/**
 * Add Bootstrap thumbnail styling to images with captions
 * Use <figure> and <figcaption>
 *
 * @link http://justintadlock.com/archives/2011/07/01/captions-in-wordpress
 */
function roots_caption($output, $attr, $content) {
  if (is_feed()) {
    return $output;
  }

  $defaults = array(
    'id' => '',
    'align' => 'alignnone',
    'width' => '',
    'caption' => ''
  );

  $attr = shortcode_atts($defaults, $attr);

  // If the width is less than 1 or there is no caption, return the content wrapped between the [caption] tags
  if (1 > $attr['width'] || empty($attr['caption'])) {
    return $content;
  }

  // Set up the attributes for the caption <div>
  $attributes  = (!empty($attr['id']) ? ' id="' . esc_attr($attr['id']) . '"' : '' );
  $attributes .= ' class="thumbnail wp-caption ' . esc_attr($attr['align']) . '"';
  $attributes .= ' style="width: ' . esc_attr($attr['width']) . 'px"';

  $output  = '<figure' . $attributes .'>';
  $output .= do_shortcode($content);
  $output .= '<figcaption class="caption wp-caption-text">' . $attr['caption'] . '</figcaption>';
  $output .= '</figure>';

  return $output;
}

add_filter('img_caption_shortcode', 'roots_caption', 10, 3);

/**
 * Remove unnecessary dashboard widgets
 *
 * @link http://www.deluxeblogtips.com/2011/01/remove-dashboard-widgets-in-wordpress.html
 */
function roots_remove_dashboard_widgets() {
  remove_meta_box('dashboard_incoming_links', 'dashboard', 'normal');
  remove_meta_box('dashboard_plugins', 'dashboard', 'normal');
  remove_meta_box('dashboard_primary', 'dashboard', 'normal');
  remove_meta_box('dashboard_secondary', 'dashboard', 'normal');
}

add_action('admin_init', 'roots_remove_dashboard_widgets');

/**
 * Cleanup the_excerpt()
 */
function roots_excerpt_length($length) {
  return POST_EXCERPT_LENGTH;
}

function roots_excerpt_more($more) {
  return ' &hellip; <a href="' . get_permalink() . '">' . __('Continued', 'roots') . '</a>';
}

add_filter('excerpt_length', 'roots_excerpt_length');
add_filter('excerpt_more', 'roots_excerpt_more');

/**
 * Replace various active menu class names with "active"
 */
function roots_wp_nav_menu($text) {
  $text = preg_replace('/(current(-menu-|[-_]page[-_])(item|parent|ancestor))/', 'active', $text);
  $text = preg_replace('/( active){2,}/', ' active', $text);
  return $text;
}

add_filter('wp_nav_menu', 'roots_wp_nav_menu');

/**
 * Cleaner walker for wp_nav_menu()
 *
 * Walker_Nav_Menu (WordPress default) example output:
 *   <li id="menu-item-8" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-8"><a href="/">Home</a></li>
 *   <li id="menu-item-9" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-9"><a href="/sample-page/">Sample Page</a></l
 *
 * Roots_Nav_Walker example output:
 *   <li class="menu-home"><a href="/">Home</a></li>
 *   <li class="menu-sample-page"><a href="/sample-page/">Sample Page</a></li>
 */
class Roots_Nav_Walker extends Walker_Nav_Menu {
  function check_current($classes) {
    return preg_match('/(current[-_])|active|dropdown/', $classes);
  }

  function start_lvl(&$output, $depth = 0, $args = array()) {
    $output .= "\n<ul class=\"dropdown-menu\">\n";
  }

  function start_el(&$output, $item, $depth = 0, $args = array(), $id = 0) {
    global $wp_query;
    $indent = ($depth) ? str_repeat("\t", $depth) : '';

    $slug = sanitize_title($item->title);
    $id = 'menu-' . $slug;

    $class_names = $value = '';
    $li_attributes = '';
    $classes = empty($item->classes) ? array() : (array) $item->classes;

    $classes = array_filter($classes, array(&$this, 'check_current'));

    if ($args->has_children) {
      $classes[]      = 'dropdown';
      $li_attributes .= ' data-dropdown="dropdown"';
    }

    if ($custom_classes = get_post_meta($item->ID, '_menu_item_classes', true)) {
      foreach ($custom_classes as $custom_class) {
        $classes[] = $custom_class;
      }
    }

    $class_names = join(' ', apply_filters('nav_menu_css_class', array_filter($classes), $item, $args));
    $class_names = $class_names ? ' class="' . $id . ' ' . esc_attr($class_names) . '"' : ' class="' . $id . '"';

    $output .= $indent . '<li' . $class_names . '>';

    $attributes  = ! empty($item->attr_title) ? ' title="'  . esc_attr($item->attr_title) .'"' : '';
    $attributes .= ! empty($item->target)     ? ' target="' . esc_attr($item->target    ) .'"' : '';
    $attributes .= ! empty($item->xfn)        ? ' rel="'    . esc_attr($item->xfn       ) .'"' : '';
    $attributes .= ! empty($item->url)        ? ' href="'   . esc_attr($item->url       ) .'"' : '';
    $attributes .= ($args->has_children)    ? ' class="dropdown-toggle" data-toggle="dropdown"' : '';

    $item_output  = $args->before;
    $item_output .= '<a'. $attributes .'>';
    $item_output .= $args->link_before . apply_filters('the_title', $item->title, $item->ID) . $args->link_after;
    $item_output .= ($args->has_children) ? ' <b class="caret"></b>' : '';
    $item_output .= '</a>';
    $item_output .= $args->after;

    $output .= apply_filters('walker_nav_menu_start_el', $item_output, $item, $depth, $args);
  }

  function display_element($element, &$children_elements, $max_depth, $depth = 0, $args, &$output) {
    if (!$element) { return; }

    $id_field = $this->db_fields['id'];

    if (is_array($args[0])) {
      $args[0]['has_children'] = !empty($children_elements[$element->$id_field]);
    } elseif (is_object($args[0])) {
      $args[0]->has_children = !empty($children_elements[$element->$id_field]);
    }

    $cb_args = array_merge(array(&$output, $element, $depth), $args);
    call_user_func_array(array(&$this, 'start_el'), $cb_args);

    $id = $element->$id_field;

    if (($max_depth == 0 || $max_depth > $depth+1) && isset($children_elements[$id])) {
      foreach ($children_elements[$id] as $child) {
        if (!isset($newlevel)) {
          $newlevel = true;
          $cb_args = array_merge(array(&$output, $depth), $args);
          call_user_func_array(array(&$this, 'start_lvl'), $cb_args);
        }
        $this->display_element($child, $children_elements, $max_depth, $depth + 1, $args, $output);
      }
      unset($children_elements[$id]);
    }

    if (isset($newlevel) && $newlevel) {
      $cb_args = array_merge(array(&$output, $depth), $args);
      call_user_func_array(array(&$this, 'end_lvl'), $cb_args);
    }

    $cb_args = array_merge(array(&$output, $element, $depth), $args);
    call_user_func_array(array(&$this, 'end_el'), $cb_args);
  }
}

/**
 * Cleanup wp_nav_menu_args
 *
 * Remove the container
 * Use Roots_Nav_Walker() by default
 */
function roots_nav_menu_args($args = '') {
  $roots_nav_menu_args['container']  = false;

  if (!$args['items_wrap']) {
    $roots_nav_menu_args['items_wrap'] = '<ul class="%2$s">%3$s</ul>';
  }

  if (current_theme_supports('bootstrap-top-navbar')) {
    $roots_nav_menu_args['depth'] = 2;
  }

  if (!$args['walker']) {
    $roots_nav_menu_args['walker'] = new Roots_Nav_Walker();
  }

  return array_merge($args, $roots_nav_menu_args);
}

add_filter('wp_nav_menu_args', 'roots_nav_menu_args');


/**
 * Remove unnecessary self-closing tags
 */
function roots_remove_self_closing_tags($input) {
  return str_replace(' />', '>', $input);
}

add_filter('get_avatar',          'roots_remove_self_closing_tags'); // <img />
add_filter('comment_id_fields',   'roots_remove_self_closing_tags'); // <input />
add_filter('post_thumbnail_html', 'roots_remove_self_closing_tags'); // <img />

/**
 * Don't return the default description in the RSS feed if it hasn't been changed
 */
function roots_remove_default_description($bloginfo) {
  $default_tagline = 'Just another WordPress site';

  return ($bloginfo === $default_tagline) ? '' : $bloginfo;
}

add_filter('get_bloginfo_rss', 'roots_remove_default_description');

/**
 * Allow more tags in TinyMCE including <iframe> and <script>
 */
function roots_change_mce_options($options) {
  $ext = 'pre[id|name|class|style],iframe[align|longdesc|name|width|height|frameborder|scrolling|marginheight|marginwidth|src],script[charset|defer|language|src|type]';

  if (isset($initArray['extended_valid_elements'])) {
    $options['extended_valid_elements'] .= ',' . $ext;
  } else {
    $options['extended_valid_elements'] = $ext;
  }

  return $options;
}

add_filter('tiny_mce_before_init', 'roots_change_mce_options');

/**
 * Cleanup output of stylesheet <link> tags
 */
add_filter('style_loader_tag', 'roots_clean_style_tag');

function roots_clean_style_tag($input) {
  preg_match_all("!<link rel='stylesheet'\s?(id='[^']+')?\s+href='(.*)' type='text/css' media='(.*)' />!", $input, $matches);
  // Only display media if it's print
  $media = $matches[3][0] === 'print' ? ' media="print"' : '';
  return '<link rel="stylesheet" href="' . $matches[2][0] . '"' . $media . '>' . "\n";
}

/**
 * Apply filters to body_class()
 */
function roots_body_class_filter($classes) {
  // Add 'top-navbar' class if using Bootstrap's Navbar
  if (current_theme_supports('bootstrap-top-navbar')) {
    $classes[] = 'top-navbar';
  }

  return $classes;
}
add_filter('body_class', 'roots_body_class_filter');

/**
 * Add additional classes onto widgets
 *
 * @link http://wordpress.org/support/topic/how-to-first-and-last-css-classes-for-sidebar-widgets
 */
function roots_widget_first_last_classes($params) {
  global $my_widget_num;

  $this_id = $params[0]['id'];
  $arr_registered_widgets = wp_get_sidebars_widgets();

  if (!$my_widget_num) {
    $my_widget_num = array();
  }

  if (!isset($arr_registered_widgets[$this_id]) || !is_array($arr_registered_widgets[$this_id])) {
    return $params;
  }

  if (isset($my_widget_num[$this_id])) {
    $my_widget_num[$this_id] ++;
  } else {
    $my_widget_num[$this_id] = 1;
  }

  $class = 'class="widget-' . $my_widget_num[$this_id] . ' ';

  if ($my_widget_num[$this_id] == 1) {
    $class .= 'widget-first ';
  } elseif ($my_widget_num[$this_id] == count($arr_registered_widgets[$this_id])) {
    $class .= 'widget-last ';
  }

  $params[0]['before_widget'] = preg_replace('/class=\"/', "$class", $params[0]['before_widget'], 1);

  return $params;

}

add_filter('dynamic_sidebar_params', 'roots_widget_first_last_classes');

/**
 * Wrap embedded media as suggested by Readability
 *
 * @link https://gist.github.com/965956
 * @link http://www.readability.com/publishers/guidelines#publisher
 */
function roots_embed_wrap($cache, $url, $attr = '', $post_ID = '') {
  return '<div class="entry-content-asset">' . $cache . '</div>';
}

add_filter('embed_oembed_html', 'roots_embed_wrap', 10, 4);
add_filter('embed_googlevideo', 'roots_embed_wrap', 10, 2);

/**
 * Tell WordPress to use searchform.php from the templates/ directory
 */
function roots_get_search_form() {
  locate_template('/templates/searchform.php', true, true);
}

add_filter('get_search_form', 'roots_get_search_form');
	<?php

	/**
	* Redirects search results from /?s=query to /search/query/, converts %20 to +
	*
	* @link http://txfx.net/wordpress-plugins/nice-search/
	*/
	function roots_nice_search_redirect() {
	if (is_search() && strpos($_SERVER['REQUEST_URI'], '/wp-admin/') === false && strpos($_SERVER['REQUEST_URI'], '/search/') === false) {
	wp_redirect(home_url('/search/' . str_replace(array(' ', '%20'), array('+', '+'), urlencode(get_query_var('s')))), 301);
	exit();
	}
	}

	add_action('template_redirect', 'roots_nice_search_redirect');

	/**
	* Fix for get_search_query() returning +'s between search terms
	*/
	function roots_search_query($escaped = true) {
	$query = apply_filters('roots_search_query', get_query_var('s'));

	if ($escaped) {
	$query = esc_attr($query);
	}

	return urldecode($query);
	}

	add_filter('get_search_query', 'roots_search_query');

	/**
	* Fix for empty search queries redirecting to home page
	*
	* @link http://wordpress.org/support/topic/blank-search-sends-you-to-the-homepage#post-1772565
	* @link http://core.trac.wordpress.org/ticket/11330
	*/
	function roots_request_filter($query_vars) {
	if (isset($_GET['s']) && empty($_GET['s'])) {
	$query_vars['s'] = ' ';
	}

	return $query_vars;
	}

	add_filter('request', 'roots_request_filter');

	/**
	* Root relative URLs
	*
	* WordPress likes to use absolute URLs on everything - let's clean that up.
	* Inspired by http://www.456bereastreet.com/archive/201010/how_to_make_wordpress_urls_root_relative/
	*
	* You can enable/disable this feature in config.php:
	* current_theme_supports('root-relative-urls');
	*
	* @author Scott Walkinshaw <scott.walkinshaw@gmail.com>
	*/
	function roots_root_relative_url($input) {
	$output = preg_replace_callback(
	'!(https?://[^/\|"]+)([^"]+)?!',
	create_function(
	'$matches',
	// If full URL is home_url("/") and this isn't a subdir install, return a slash for relative root
	'if (isset($matches[0]) && $matches[0] === home_url("/") && str_replace("http://", "", home_url("/", "http"))==$_SERVER["HTTP_HOST"]) { return "/";' .
	// If domain is equal to home_url("/"), then make URL relative
	'} elseif (isset($matches[0]) && strpos($matches[0], home_url("/")) !== false) { return $matches[2];' .
	// If domain is not equal to home_url("/"), do not make external link relative
	'} else { return $matches[0]; };'
	),
	$input
	);

	return $output;
	}

	/**
	* Terrible workaround to remove the duplicate subfolder in the src of <script> and <link> tags
	* Example: /subfolder/subfolder/css/style.css
	*/
	function roots_fix_duplicate_subfolder_urls($input) {
	$output = roots_root_relative_url($input);
	preg_match_all('!([^/]+)/([^/]+)!', $output, $matches);

	if (isset($matches[1]) && isset($matches[2])) {
	if ($matches[1][0] === $matches[2][0]) {
	$output = substr($output, strlen($matches[1][0]) + 1);
	}
	}

	return $output;
	}

	function enable_root_relative_urls() {
	return !(is_admin() && in_array($GLOBALS['pagenow'], array('wp-login.php', 'wp-register.php'))) && current_theme_supports('root-relative-urls');
	}

	if (enable_root_relative_urls()) {
	$root_rel_filters = array(
	'bloginfo_url',
	'theme_root_uri',
	'stylesheet_directory_uri',
	'template_directory_uri',
	'plugins_url',
	'the_permalink',
	'wp_list_pages',
	'wp_list_categories',
	'wp_nav_menu',
	'the_content_more_link',
	'the_tags',
	'get_pagenum_link',
	'get_comment_link',
	'month_link',
	'day_link',
	'year_link',
	'tag_link',
	'the_author_posts_link'
	);

	add_filters($root_rel_filters, 'roots_root_relative_url');

	add_filter('script_loader_src', 'roots_fix_duplicate_subfolder_urls');
	add_filter('style_loader_src', 'roots_fix_duplicate_subfolder_urls');
	}

	/**
	* Cleanup language_attributes() used in <html> tag
	*
	* Change lang="en-US" to lang="en"
	* Remove dir="ltr"
	*/
	function roots_language_attributes() {
	$attributes = array();
	$output = '';

	if (function_exists('is_rtl')) {
	if (is_rtl() == 'rtl') {
	$attributes[] = 'dir="rtl"';
	}
	}

	$lang = get_bloginfo('language');

	if ($lang && $lang !== 'en-US') {
	$attributes[] = "lang=\"$lang\"";
	} else {
	$attributes[] = 'lang="en"';
	}

	$output = implode(' ', $attributes);
	$output = apply_filters('roots_language_attributes', $output);

	return $output;
	}

	add_filter('language_attributes', 'roots_language_attributes');

	/**
	* Remove the WordPress version from RSS feeds
	*/
	function roots_remove_generator() { return; }

	add_filter('the_generator', 'roots_remove_generator');

	/**
	* Cleanup wp_head()
	*
	* Remove unnecessary <link>'s
	* Remove inline CSS used by Recent Comments widget
	* Remove inline CSS used by posts with galleries
	* Remove self-closing tag and change ''s to "'s on rel_canonical()
	*/
	function roots_head_cleanup() {
	// http://wpengineer.com/1438/wordpress-header/
	remove_action('wp_head', 'feed_links', 2);
	remove_action('wp_head', 'feed_links_extra', 3);
	remove_action('wp_head', 'rsd_link');
	remove_action('wp_head', 'wlwmanifest_link');
	remove_action('wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0);
	remove_action('wp_head', 'wp_generator');
	remove_action('wp_head', 'wp_shortlink_wp_head', 10, 0);

	add_action('wp_head', 'roots_remove_recent_comments_style', 1);
	add_filter('use_default_gallery_style', '__return_null');

	if (!class_exists('WPSEO_Frontend')) {
	remove_action('wp_head', 'rel_canonical');
	add_action('wp_head', 'roots_rel_canonical');
	}
	}

	function roots_rel_canonical() {
	global $wp_the_query;

	if (!is_singular()) {
	return;
	}

	if (!$id = $wp_the_query->get_queried_object_id()) {
	return;
	}

	$link = get_permalink($id);
	echo "\t<link rel=\"canonical\" href=\"$link\">\n";
	}

	function roots_remove_recent_comments_style() {
	global $wp_widget_factory;

	if (isset($wp_widget_factory->widgets['WP_Widget_Recent_Comments'])) {
	remove_action('wp_head', array($wp_widget_factory->widgets['WP_Widget_Recent_Comments'], 'recent_comments_style'));
	}
	}

	add_action('init', 'roots_head_cleanup');

	/**
	* Cleanup gallery_shortcode()
	*
	* Re-create the [gallery] shortcode and use thumbnails styling from Bootstrap
	*
	* @link http://twitter.github.com/bootstrap/components.html#thumbnails
	*/
	function roots_gallery($attr) {
	global $post, $wp_locale;

	static $instance = 0;
	$instance++;

	$output = apply_filters('post_gallery', '', $attr);

	if ($output != '') {
	return $output;
	}

	if (isset($attr['orderby'])) {
	$attr['orderby'] = sanitize_sql_orderby($attr['orderby']);
	if (!$attr['orderby']) {
	unset($attr['orderby']);
	}
	}

	extract(shortcode_atts(array(
	'order' => 'ASC',
	'orderby' => 'menu_order ID',
	'id' => $post->ID,
	'icontag' => 'li',
	'captiontag' => 'p',
	'columns' => 3,
	'size' => 'thumbnail',
	'include' => '',
	'exclude' => ''
	), $attr));

	$id = intval($id);

	if ($order === 'RAND') {
	$orderby = 'none';
	}

	if (!empty($include)) {
	$include = preg_replace( '/[^0-9,]+/', '', $include );
	$_attachments = get_posts( array('include' => $include, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby) );

	$attachments = array();
	foreach ($_attachments as $key => $val) {
	$attachments[$val->ID] = $_attachments[$key];
	}
	} elseif (!empty($exclude)) {
	$exclude = preg_replace('/[^0-9,]+/', '', $exclude);
	$attachments = get_children(array('post_parent' => $id, 'exclude' => $exclude, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby));
	} else {
	$attachments = get_children(array('post_parent' => $id, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby));
	}

	if (empty($attachments)) {
	return '';
	}

	if (is_feed()) {
	$output = "\n";
	foreach ($attachments as $att_id => $attachment)
	$output .= wp_get_attachment_link($att_id, $size, true) . "\n";
	return $output;
	}

	$captiontag = tag_escape($captiontag);
	$columns = intval($columns);
	$itemwidth = $columns > 0 ? floor(100/$columns) : 100;
	$float = is_rtl() ? 'right' : 'left';
	$selector = "gallery-{$instance}";

	$gallery_style = $gallery_div = '';

	if (apply_filters('use_default_gallery_style', true)) {
	$gallery_style = '';
	}

	$size_class = sanitize_html_class($size);
	$gallery_div = "<ul id='$selector' class='thumbnails gallery galleryid-{$id} gallery-columns-{$columns} gallery-size-{$size_class}'>";
	$output = apply_filters('gallery_style', $gallery_style . "\n\t\t" . $gallery_div);

	$i = 0;
	foreach ($attachments as $id => $attachment) {
	$link = isset($attr['link']) && 'file' == $attr['link'] ? wp_get_attachment_link($id, $size, false, false) : wp_get_attachment_link($id, $size, true, false);

	$output .= "
	<{$icontag} class=\"gallery-item\">
	$link
	";
	if ($captiontag && trim($attachment->post_excerpt)) {
	$output .= "
	<{$captiontag} class=\"gallery-caption hidden\">
	" . wptexturize($attachment->post_excerpt) . "
	</{$captiontag}>";
	}
	$output .= "</{$icontag}>";
	if ($columns > 0 && ++$i % $columns == 0) {
	$output .= '';
	}
	}

	$output .= "</ul>\n";

	return $output;
	}

	remove_shortcode('gallery');
	add_shortcode('gallery', 'roots_gallery');

	/**
	* Add class="thumbnail" to attachment items
	*/
	function roots_attachment_link_class($html) {
	$postid = get_the_ID();
	$html = str_replace('<a', '<a class="thumbnail"', $html);
	return $html;
	}

	add_filter('wp_get_attachment_link', 'roots_attachment_link_class', 10, 1);

	/**
	* Add Bootstrap thumbnail styling to images with captions
	* Use <figure> and <figcaption>
	*
	* @link http://justintadlock.com/archives/2011/07/01/captions-in-wordpress
	*/
	function roots_caption($output, $attr, $content) {
	if (is_feed()) {
	return $output;
	}

	$defaults = array(
	'id' => '',
	'align' => 'alignnone',
	'width' => '',
	'caption' => ''
	);

	$attr = shortcode_atts($defaults, $attr);

	// If the width is less than 1 or there is no caption, return the content wrapped between the [caption] tags
	if (1 > $attr['width'] \|\| empty($attr['caption'])) {
	return $content;
	}

	// Set up the attributes for the caption <div>
	$attributes = (!empty($attr['id']) ? ' id="' . esc_attr($attr['id']) . '"' : '' );
	$attributes .= ' class="thumbnail wp-caption ' . esc_attr($attr['align']) . '"';
	$attributes .= ' style="width: ' . esc_attr($attr['width']) . 'px"';

	$output = '<figure' . $attributes .'>';
	$output .= do_shortcode($content);
	$output .= '<figcaption class="caption wp-caption-text">' . $attr['caption'] . '</figcaption>';
	$output .= '</figure>';

	return $output;
	}

	add_filter('img_caption_shortcode', 'roots_caption', 10, 3);

	/**
	* Remove unnecessary dashboard widgets
	*
	* @link http://www.deluxeblogtips.com/2011/01/remove-dashboard-widgets-in-wordpress.html
	*/
	function roots_remove_dashboard_widgets() {
	remove_meta_box('dashboard_incoming_links', 'dashboard', 'normal');
	remove_meta_box('dashboard_plugins', 'dashboard', 'normal');
	remove_meta_box('dashboard_primary', 'dashboard', 'normal');
	remove_meta_box('dashboard_secondary', 'dashboard', 'normal');
	}

	add_action('admin_init', 'roots_remove_dashboard_widgets');

	/**
	* Cleanup the_excerpt()
	*/
	function roots_excerpt_length($length) {
	return POST_EXCERPT_LENGTH;
	}

	function roots_excerpt_more($more) {
	return ' … <a href="' . get_permalink() . '">' . __('Continued', 'roots') . '</a>';
	}

	add_filter('excerpt_length', 'roots_excerpt_length');
	add_filter('excerpt_more', 'roots_excerpt_more');

	/**
	* Replace various active menu class names with "active"
	*/
	function roots_wp_nav_menu($text) {
	$text = preg_replace('/(current(-menu-\|[-_]page[-_])(item\|parent\|ancestor))/', 'active', $text);
	$text = preg_replace('/( active){2,}/', ' active', $text);
	return $text;
	}

	add_filter('wp_nav_menu', 'roots_wp_nav_menu');

	/**
	* Cleaner walker for wp_nav_menu()
	*
	* Walker_Nav_Menu (WordPress default) example output:
	* <li id="menu-item-8" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-8"><a href="/">Home</a></li>
	* <li id="menu-item-9" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-9"><a href="/sample-page/">Sample Page</a></l
	*
	* Roots_Nav_Walker example output:
	* <li class="menu-home"><a href="/">Home</a></li>
	* <li class="menu-sample-page"><a href="/sample-page/">Sample Page</a></li>
	*/
	class Roots_Nav_Walker extends Walker_Nav_Menu {
	function check_current($classes) {
	return preg_match('/(current[-_])\|active\|dropdown/', $classes);
	}

	function start_lvl(&$output, $depth = 0, $args = array()) {
	$output .= "\n<ul class=\"dropdown-menu\">\n";
	}

	function start_el(&$output, $item, $depth = 0, $args = array(), $id = 0) {
	global $wp_query;
	$indent = ($depth) ? str_repeat("\t", $depth) : '';

	$slug = sanitize_title($item->title);
	$id = 'menu-' . $slug;

	$class_names = $value = '';
	$li_attributes = '';
	$classes = empty($item->classes) ? array() : (array) $item->classes;

	$classes = array_filter($classes, array(&$this, 'check_current'));

	if ($args->has_children) {
	$classes[] = 'dropdown';
	$li_attributes .= ' data-dropdown="dropdown"';
	}

	if ($custom_classes = get_post_meta($item->ID, '_menu_item_classes', true)) {
	foreach ($custom_classes as $custom_class) {
	$classes[] = $custom_class;
	}
	}

	$class_names = join(' ', apply_filters('nav_menu_css_class', array_filter($classes), $item, $args));
	$class_names = $class_names ? ' class="' . $id . ' ' . esc_attr($class_names) . '"' : ' class="' . $id . '"';

	$output .= $indent . '<li' . $class_names . '>';

	$attributes = ! empty($item->attr_title) ? ' title="' . esc_attr($item->attr_title) .'"' : '';
	$attributes .= ! empty($item->target) ? ' target="' . esc_attr($item->target ) .'"' : '';
	$attributes .= ! empty($item->xfn) ? ' rel="' . esc_attr($item->xfn ) .'"' : '';
	$attributes .= ! empty($item->url) ? ' href="' . esc_attr($item->url ) .'"' : '';
	$attributes .= ($args->has_children) ? ' class="dropdown-toggle" data-toggle="dropdown"' : '';

	$item_output = $args->before;
	$item_output .= '<a'. $attributes .'>';
	$item_output .= $args->link_before . apply_filters('the_title', $item->title, $item->ID) . $args->link_after;
	$item_output .= ($args->has_children) ? ' <b class="caret"></b>' : '';
	$item_output .= '</a>';
	$item_output .= $args->after;

	$output .= apply_filters('walker_nav_menu_start_el', $item_output, $item, $depth, $args);
	}

	function display_element($element, &$children_elements, $max_depth, $depth = 0, $args, &$output) {
	if (!$element) { return; }

	$id_field = $this->db_fields['id'];

	if (is_array($args[0])) {
	$args[0]['has_children'] = !empty($children_elements[$element->$id_field]);
	} elseif (is_object($args[0])) {
	$args[0]->has_children = !empty($children_elements[$element->$id_field]);
	}

	$cb_args = array_merge(array(&$output, $element, $depth), $args);
	call_user_func_array(array(&$this, 'start_el'), $cb_args);

	$id = $element->$id_field;

	if (($max_depth == 0 \|\| $max_depth > $depth+1) && isset($children_elements[$id])) {
	foreach ($children_elements[$id] as $child) {
	if (!isset($newlevel)) {
	$newlevel = true;
	$cb_args = array_merge(array(&$output, $depth), $args);
	call_user_func_array(array(&$this, 'start_lvl'), $cb_args);
	}
	$this->display_element($child, $children_elements, $max_depth, $depth + 1, $args, $output);
	}
	unset($children_elements[$id]);
	}

	if (isset($newlevel) && $newlevel) {
	$cb_args = array_merge(array(&$output, $depth), $args);
	call_user_func_array(array(&$this, 'end_lvl'), $cb_args);
	}

	$cb_args = array_merge(array(&$output, $element, $depth), $args);
	call_user_func_array(array(&$this, 'end_el'), $cb_args);
	}
	}

	/**
	* Cleanup wp_nav_menu_args
	*
	* Remove the container
	* Use Roots_Nav_Walker() by default
	*/
	function roots_nav_menu_args($args = '') {
	$roots_nav_menu_args['container'] = false;

	if (!$args['items_wrap']) {
	$roots_nav_menu_args['items_wrap'] = '<ul class="%2$s">%3$s</ul>';
	}

	if (current_theme_supports('bootstrap-top-navbar')) {
	$roots_nav_menu_args['depth'] = 2;
	}

	if (!$args['walker']) {
	$roots_nav_menu_args['walker'] = new Roots_Nav_Walker();
	}

	return array_merge($args, $roots_nav_menu_args);
	}

	add_filter('wp_nav_menu_args', 'roots_nav_menu_args');


	/**
	* Remove unnecessary self-closing tags
	*/
	function roots_remove_self_closing_tags($input) {
	return str_replace(' />', '>', $input);
	}

	add_filter('get_avatar', 'roots_remove_self_closing_tags'); // <img />
	add_filter('comment_id_fields', 'roots_remove_self_closing_tags'); // <input />
	add_filter('post_thumbnail_html', 'roots_remove_self_closing_tags'); // <img />

	/**
	* Don't return the default description in the RSS feed if it hasn't been changed
	*/
	function roots_remove_default_description($bloginfo) {
	$default_tagline = 'Just another WordPress site';

	return ($bloginfo === $default_tagline) ? '' : $bloginfo;
	}

	add_filter('get_bloginfo_rss', 'roots_remove_default_description');

	/**
	* Allow more tags in TinyMCE including <iframe> and <script>
	*/
	function roots_change_mce_options($options) {
	$ext = 'pre[id\|name\|class\|style],iframe[align\|longdesc\|name\|width\|height\|frameborder\|scrolling\|marginheight\|marginwidth\|src],script[charset\|defer\|language\|src\|type]';

	if (isset($initArray['extended_valid_elements'])) {
	$options['extended_valid_elements'] .= ',' . $ext;
	} else {
	$options['extended_valid_elements'] = $ext;
	}

	return $options;
	}

	add_filter('tiny_mce_before_init', 'roots_change_mce_options');

	/**
	* Cleanup output of stylesheet <link> tags
	*/
	add_filter('style_loader_tag', 'roots_clean_style_tag');

	function roots_clean_style_tag($input) {
	preg_match_all("!<link rel='stylesheet'\s?(id='[^']+')?\s+href='(.)' type='text/css' media='(.)' />!", $input, $matches);
	// Only display media if it's print
	$media = $matches[3][0] === 'print' ? ' media="print"' : '';
	return '<link rel="stylesheet" href="' . $matches[2][0] . '"' . $media . '>' . "\n";
	}

	/**
	* Apply filters to body_class()
	*/
	function roots_body_class_filter($classes) {
	// Add 'top-navbar' class if using Bootstrap's Navbar
	if (current_theme_supports('bootstrap-top-navbar')) {
	$classes[] = 'top-navbar';
	}

	return $classes;
	}
	add_filter('body_class', 'roots_body_class_filter');

	/**
	* Add additional classes onto widgets
	*
	* @link http://wordpress.org/support/topic/how-to-first-and-last-css-classes-for-sidebar-widgets
	*/
	function roots_widget_first_last_classes($params) {
	global $my_widget_num;

	$this_id = $params[0]['id'];
	$arr_registered_widgets = wp_get_sidebars_widgets();

	if (!$my_widget_num) {
	$my_widget_num = array();
	}

	if (!isset($arr_registered_widgets[$this_id]) \|\| !is_array($arr_registered_widgets[$this_id])) {
	return $params;
	}

	if (isset($my_widget_num[$this_id])) {
	$my_widget_num[$this_id] ++;
	} else {
	$my_widget_num[$this_id] = 1;
	}

	$class = 'class="widget-' . $my_widget_num[$this_id] . ' ';

	if ($my_widget_num[$this_id] == 1) {
	$class .= 'widget-first ';
	} elseif ($my_widget_num[$this_id] == count($arr_registered_widgets[$this_id])) {
	$class .= 'widget-last ';
	}

	$params[0]['before_widget'] = preg_replace('/class=\"/', "$class", $params[0]['before_widget'], 1);

	return $params;

	}

	add_filter('dynamic_sidebar_params', 'roots_widget_first_last_classes');

	/**
	* Wrap embedded media as suggested by Readability
	*
	* @link https://gist.github.com/965956
	* @link http://www.readability.com/publishers/guidelines#publisher
	*/
	function roots_embed_wrap($cache, $url, $attr = '', $post_ID = '') {
	return '<div class="entry-content-asset">' . $cache . '</div>';
	}

	add_filter('embed_oembed_html', 'roots_embed_wrap', 10, 4);
	add_filter('embed_googlevideo', 'roots_embed_wrap', 10, 2);

	/**
	* Tell WordPress to use searchform.php from the templates/ directory
	*/
	function roots_get_search_form() {
	locate_template('/templates/searchform.php', true, true);
	}

	add_filter('get_search_form', 'roots_get_search_form');