The iSarch theme functions file

functions.php

<?php
// Sets up includes functions
include_once( ABSPATH . 'wp-content/themes/twentyfourteen-child/inc/enqueues.php' );
include_once( ABSPATH . 'wp-content/themes/twentyfourteen-child/inc/post-types.php' );
include_once( ABSPATH . 'wp-content/themes/twentyfourteen-child/inc/media-gallery.php' );
include_once( ABSPATH . 'wp-content/themes/twentyfourteen-child/inc/featured-template-tags.php' );

// Disable dashboard widgets
add_action('admin_menu', 'disable_default_dashboard_widgets');
function disable_default_dashboard_widgets() {
    remove_meta_box('dashboard_incoming_links', 'dashboard', 'core');
}

// Custom dashboard widget
add_action('wp_dashboard_setup', 'add_isar_required_id_widget');
function add_isar_required_id_widget() {
	wp_add_dashboard_widget('isar_required_id_widget', 'Theme info', 'isar_required_id_widget');
}
function isar_required_id_widget() {
	echo "
	<dl>
		<dt><h4>Required page slugs:</h4></dt>
		<dd><b>map</b> - <code>isar_get_id_by_slug( 'map' );</code> <pre>inc\scraps\contacts_map.php</pre></dd>
		<dd><b>tweets</b> - <code>isar_get_id_by_slug( 'tweets' );</code> <pre>inc\scraps\about_tweets.php</pre></dd>
		<dd><b>contacts</b> - <code>isar_get_id_by_slug( 'contacts' );</code> <pre>inc\scraps\slide_out.php</pre></dd>
		<dd><b>availability</b> - <code>isar_get_id_by_slug( 'availability' );</code> <pre>inc\scraps\about_availability.php,<br />inc\scraps\about_availability.php</pre></dd>
	</dl>";
}

// Add menus
function register_my_menus() {
	register_nav_menus(
		array(
			'sectors-menu' => __( 'Sectors Menu', 'twentyfourteen' ),
			'events-menu' => __( 'Events Menu', 'twentyfourteen' )
		)
	);
}
add_action( 'init', 'register_my_menus' );

/**
 * Add sidebars
 */
// Add third sidebar
function third_sidebar() {
	register_sidebar(
		array(
			'name'          => __( 'Contacts Sidebar', 'twentyfourteen' ),
			'id'            => 'sidebar-4',
			'description'   => __( 'Appears on posts and pages in the sidebar.', 'twentyfourteen' ),
			'before_widget' => '<aside id="%1$s" class="widget %2$s">',
			'after_widget'  => '</aside>',
			'before_title'  => '<h3 class="widget-title">',
			'after_title'   => '</h3>'
		)
	);
	dynamic_sidebar( 'sidebar-4' );
}
add_action( 'widgets_init', 'third_sidebar' );

// Add fourth sidebar
function fourth_sidebar() {
	register_sidebar(
		array(
			'name'          => __( 'Resources Sidebar', 'twentyfourteen' ),
			'id'            => 'sidebar-5',
			'description'   => __( 'Appears on Total Resources Page Template.', 'twentyfourteen' ),
			'before_widget' => '<aside id="%1$s" class="widget widget_nav_menu">', // widget_nav_menu i5
			'after_widget'  => '</aside>',
			'before_title'  => '<h3 class="widget-title">',
			'after_title'   => '</h3>'
		)
	);
	dynamic_sidebar( 'sidebar-5' );
}
add_action( 'widgets_init', 'fourth_sidebar' );

// Add fifth sidebar
function fifth_sidebar() {
	register_sidebar(
		array(
			'name'          => __( 'Floating Menu Sidebar', 'twentyfourteen' ),
			'id'            => 'sidebar-6',
			'description'   => __( 'Appears on Floating Menu Template sidebar.', 'twentyfourteen' ),
			'before_widget' => '<aside id="%1$s" class="widget %2$s">',
			'after_widget'  => '</aside>',
			'before_title'  => '<h3 class="widget-title">',
			'after_title'   => '</h3>',
		)
	);
	dynamic_sidebar( 'sidebar-6' );
}
add_action( 'widgets_init', 'fifth_sidebar' );

// Add sixth sidebar
function sixth_sidebar() {
	register_sidebar(
		array(
			'name'          => __( 'Projects Sidebar', 'twentyfourteen' ),
			'id'            => 'sidebar-7',
			'description'   => __( 'Appears on Projects Single sidebar.', 'twentyfourteen' ),
			'before_widget' => '<aside id="%1$s" class="widget %2$s">',
			'after_widget'  => '</aside>',
			'before_title'  => '<h3 class="widget-title">',
			'after_title'   => '</h3>'
		)
	);
}
add_action( 'widgets_init', 'sixth_sidebar' );

// Add seventh sidebar
add_action( 'widgets_init', 'seventh_sidebar' );
function seventh_sidebar() {
	register_sidebar(
		array(
			'name'          => __( 'Content Page Sidebar', 'twentyfourteen' ),
			'id'            => 'sidebar-8',
			'description'   => __( 'Appears on pages in the sidebar.', 'twentyfourteen' ),
			'before_widget' => '<aside id="%1$s" class="widget %2$s">',
			'after_widget'  => '</aside>',
			'before_title'  => '<h3 class="widget-title">',
			'after_title'   => '</h3>'
		)
	);
}

// Remove Private and Protected text in post titles
add_filter( 'the_title', 'the_title_trim' );
function the_title_trim($title) {
	$pattern[0] = '/Protected:/';
	$pattern[1] = '/Private:/';
	$replacement[0] = 'Pw:';
	$replacement[1] = 'Pr:';
	return preg_replace($pattern, $replacement, $title);
}

/**
 * Remove specific post class twice
 */
// Remove specific post class from Team Archive
add_filter( 'post_class', 'remove_projects_has_post_thumbnail_class', 20 );
function remove_projects_has_post_thumbnail_class( $classes ) {
	if( is_singular( 'projects' )
	||	is_page_template( 'page-templates/maintenance.php' )
	||	is_page_template( 'page-templates/about.php' )
	||	is_post_type_archive( 'team' )	
	||	is_singular( 'press' )	
	){
		foreach( $classes as $key => $value ){
			if( $value=='has-post-thumbnail' ){ unset( $classes[$key] ); }
		}
	}
	return $classes;
}

/**
 * Remove specific body class
 */
// Remove full-width class to prevent enlarged articles when the content sidebar is inactive
add_filter( 'body_class', 'remove_full_width_class', 11 );
function remove_full_width_class( $classes ) {
	if( is_post_type_archive( 'curriculum' )
	) $classes = array_diff( $classes, array( 'full-width' ) );
	return $classes;
}

// Remove custom-background class class
add_filter( 'body_class', 'remove_my_class', 11 );
function remove_my_class( $classes ) {
	if( is_tag( 'remove-custom-background' )
	||	is_page_template( 'page-templates/about.php' )
	||	is_page_template( 'page-templates/maintenance.php' )
	) $classes = array_diff( $classes, array( 'custom-background' ) );
	return $classes;
}

/**
 * Add specific body class
 */
// Add 'full-width loose' body classes
add_filter( 'body_class', 'full_width_loose_body_class' );
function full_width_loose_body_class( $classes ) {
	if( is_page_template( 'page-templates/full-width-loose-total.php' )
	||	is_post_type_archive( 'journal' )
	) $classes[] = 'full-width loose';
     return $classes;
}

// Add 'featured-view' body class to style the main page
add_filter( 'body_class', 'featured_view_body_class' );
function featured_view_body_class( $classes ) {
	if( is_page_template( 'page-templates/main.php' )
	) $classes[] = 'featured-view';
     return $classes;
}

// Add 'total' body class
add_filter( 'body_class', 'total_body_class' );
function total_body_class( $classes ) {
	if( is_tag( 'total' )
	||	is_singular( 'projects' )
	||	is_singular( 'press' )
	||	is_singular( 'curriculum' )
	||	is_singular( 'freebies' )
	||	is_singular( 'team' )
	||	is_singular( 'journal' )
	||	is_page()
	||	is_post_type_archive( 'team' )
	||	is_post_type_archive( 'projects' )
	||	is_post_type_archive( 'press' )
	||	is_post_type_archive( 'curriculum' )
	||	is_post_type_archive( 'journal' )
	||	is_post_type_archive( 'freebies' )
	||	is_post_type_archive( 'feeds' )
	||	is_tax( 'sector' )
	||	is_tax( 'pursuit' )
	||	is_tax( 'architect' )
	||	is_tax( 'manager' )
	||	is_tax( 'location' )
	||	is_tax( 'client' )
	||	is_tax( 'years' )
	) $classes[] = 'total';
     return $classes;
}

// Add 'transparent' body class
add_filter( 'body_class', 'transparent_body_class' );
function transparent_body_class( $classes ) {
	if( is_page_template( 'page-templates/about.php' )
	||	is_page_template( 'page-templates/maintenance.php' )
	) $classes[] = 'transparent';
     return $classes;
}

// Add page slug body class to detect the script to enqueue
add_filter( 'body_class', 'add_slug_body_class' );
function add_slug_body_class( $classes ) {
	global $post;
	if ( isset( $post ) ) { $classes[] = $post->post_type . '-' . $post->post_name; }
	return $classes;
}

// Add Curriculum post-type taxonomies archive to specific template
add_filter( 'archive_template', 'get_custom_tax_template' );
function get_custom_tax_template( $tax_template ) {
	global $post;
	if( is_tax ( 'years' )
	||	is_tax ( 'manager' )
	||	is_tax ( 'location' )
	||	is_tax ( 'client' )
	) { $tax_template = dirname( __FILE__ ) . '/taxonomy-architect.php'; }
	return $tax_template;
}

// Add Press post-type archive and single to specific template
add_filter( 'archive_template', 'get_archive_projects_template' );
function get_archive_projects_template( $archive_template ) {
	global $post;
	if( is_post_type_archive( 'press' )
	) { $archive_template = dirname( __FILE__ ) . '/archive-projects.php'; }
	return $archive_template;
}

add_filter( 'single_template', 'get_single_projects_template' );
function get_single_projects_template( $single_template ) {
	global $post;
	if( is_singular( 'press' )
	||	is_singular( 'curriculum' )
	) { $single_template = dirname( __FILE__ ) . '/single-freebies.php'; }
	return $single_template;
}


// Add Agenda pages to spacific template
add_filter( 'page_template', 'get_agenda_page_template' );
function get_agenda_page_template( $page_template ) {
	global $post;
	// Get page ID by slug
	$id = get_page_by_path( 'agenda' )->ID;
	// Switch language
	include_once( ABSPATH . 'wp-admin/includes/plugin.php' );
	if( is_plugin_active( 'polylang/polylang.php' ) ) {
		$id_it = pll_get_post( $id, 'it' );
		$id_en = pll_get_post( $id, 'en' );
		// Get template
		if( is_page( $id_it )
		||	is_page( $id_en )
		) { $page_template = dirname( __FILE__ ) . '/page-agenda.php'; }
	}
	return $page_template;
}

// Add Services pages to specific template
add_filter( 'page_template', 'get_custom_page_template' );
function get_custom_page_template( $page_template ) {
	global $post;
	if( is_page ( 'servizi' ) ) { $page_template = dirname( __FILE__ ) . '/page-services.php'; }
	return $page_template;
}

// Return an ID of an attachment by searching the database
function isar_get_attachment_id_by_url( $url ) {
	$parse_url  = explode( parse_url( WP_CONTENT_URL, PHP_URL_PATH ), $url );
	$this_host = str_ireplace( 'www.', '', parse_url( home_url(), PHP_URL_HOST ) );
	$file_host = str_ireplace( 'www.', '', parse_url( $url, PHP_URL_HOST ) );
	if ( ! isset( $parse_url[1] ) || empty( $parse_url[1] ) || ( $this_host != $file_host ) )
		return;
	global $wpdb;
	$prefix     = $wpdb->prefix;
	$attachment = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM " . $prefix . "posts WHERE guid RLIKE %s;", $parse_url[1] ) );
	return $attachment[0];
}

// Return ID Page by Slug
function isar_get_id_by_slug( $page_slug ) {
	$page = get_page_by_path( $page_slug );
	if ( $page ) {
		return $page->ID;
	} else {
		return null;
	}
}

// Translate
add_action( 'after_setup_theme', 'my_child_theme_setup' );
function my_child_theme_setup() {
    load_child_theme_textdomain( 'twentyfourteen-child', get_stylesheet_directory() . '/languages' );
}

// Drop down for taxonomies
function isar_taxonomy_dropdown(
	$taxonomy,
	$orderby = 'date',
	$order = 'DESC',
	$number = '-1',
	$name,
	$show_option_all = null,
	$show_option_none = null
	) {
	$args = array(
		'orderby' => $orderby,
		'order' => $order,
		'number' => $number,
	);
	$terms = get_terms( $taxonomy, $args );
	$name = ( $name ) ? $name : $taxonomy;
	if ( $terms ) {
		printf( '<select name="%s" class="postform">', esc_attr( $name ) );
		if ( $show_option_all ) { printf( '<option value="0">%s</option>', esc_html( $show_option_all ) ); }
		if ( $show_option_none ) { printf( '<option value="-1">%s</option>', esc_html( $show_option_none ) ); }
		foreach ( $terms as $term ) { printf( '<option value="%s">%s</option>', esc_attr( $term->slug ), esc_html( $term->name ) ); }
		print( '</select>' );
	}
}

// Rename post format
add_filter( 'esc_html', 'rename_post_formats' );
function rename_post_formats( $safe_text ) {
    if ( $safe_text == _x( 'Aside', 'Post format' ) )
		return _x( 'Snippet', 'Post format', 'twentyfourteen-child' );
    return $safe_text;
}

// Replace Image post format content
add_filter( 'the_content', 'isar_image_post_format_content' );
function isar_image_post_format_content($content) {
	global $post;
	$format = get_post_format();
	if( $format == 'image' ) {
		$content = '<img class="attachment-post-thumbnail wp-post-image" src="';
		$content .= get_the_content();
		$content .= '" alt="';
		$content .= get_the_title();
		$content .= '" />';
	}
	return $content;
}

// Append meta-box to post content
add_filter( 'the_content', 'isar_append_post_content' );
function isar_append_post_content($content) {
	global $post;
	if(	is_singular('post') == true
	||	is_singular('press') == true
	||	is_singular('curriculum') == true ) {
		$reading_a = get_post_meta($post->ID, '_meta_reading_a_key', true);
		$reading_b = get_post_meta($post->ID, '_meta_reading_b_key', true);
		$reading_c = get_post_meta($post->ID, '_meta_reading_c_key', true);
		$anchor_a = get_post_meta($post->ID, '_meta_anchor_a_key', true);
		$anchor_b = get_post_meta($post->ID, '_meta_anchor_b_key', true);
		$anchor_c = get_post_meta($post->ID, '_meta_anchor_c_key', true);
		// Print More info
		if( $reading_a != '' ) {
			$content .= '<div class="entry-meta-tax">';
			$content .= __( 'More info:', 'twentyfourteen-child' );
			$content .= '<ul>';
			$content .= '<li><a href="'.$reading_a.'" target="_blank">'. $anchor_a .'</a></li>';
			if ( $reading_b != '' ) { $content .= '<li><a href="'.$reading_b.'" target="_blank">'. $anchor_b .'</a></li>'; }
			if ( $reading_c != '' ) { $content .= '<li><a href="'.$reading_c.'" target="_blank">'. $anchor_c .'</a></li>'; }
			$content .= '</ul>';
			$content .= '</div>';
		}
	}
	return $content;
}

/**
 * Automatically close comments
 */
// Close comments in single post
add_filter( 'the_posts', 'close_comments' );
function close_comments( $posts ) {
$post_type = array( 'press', 'feeds' );
	if ( !is_single() ) { return $posts; }
	foreach( $post_type as $value ) {
		if( $value == get_post_type($posts[0]->ID) ) {
			$posts[0]->comment_status = 'closed';
			$posts[0]->ping_status    = 'closed';
			wp_update_post( $posts[0] );
		}
	}
	return $posts;
}

// Remove single post tag from blog
add_action( 'pre_get_posts', 'isar_remove_post_from_blog_by_tag' );
function isar_remove_post_from_blog_by_tag( $query ) {
	// Get tag ID by slug
	$tag_by_slug = get_term_by('slug', 'about', 'post_tag');
	$tag_id = $tag_by_slug->term_id;
	// Language
	include_once( ABSPATH . 'wp-admin/includes/plugin.php' );			
	if( is_plugin_active( 'polylang/polylang.php' ) ):
		$current_tag_id = $tag_id;
		$language = get_bloginfo( 'language' );
		if ( $language == 'it-IT' ) { $tag_id = pll_get_term( $current_tag_id, 'it' ); }
	endif;
	// Remove post within specific tag ID
    if( $query->is_main_query() && $query->is_home() ) {
        $query->set( 'tag__not_in', $tag_id  );
    }
}

// Append redirect to head
add_action('wp_head','isar_language_redirect');
function isar_language_redirect() {
	include_once( ABSPATH . 'wp-admin/includes/plugin.php' );
	if( is_plugin_active( 'polylang/polylang.php' ) ) {
		if( is_post_type_archive( 'freebies' ) && pll_current_language() !== 'en' ) {
			$languages = pll_the_languages( array( 'raw' => 1 ) );
			foreach( $languages as $language ) {
				if( $language['slug'] == 'en' ){
					// Get the english language archive url
					$url = $language['url'];
					// Redirect to the english language archive
					$redirect='<meta http-equiv="refresh" content="0; url='.$url.'" />';
					echo $redirect;
				}
			}
		}
		// Show Popup
		if( is_post_type_archive( 'freebies' ) ) {
			$popup = '
			<script>
			jQuery(document).ready(function($) {
			// Get MODAL language
			if("en" !== $.cookie("pll_language_modal_ic") ) {
				setTimeout(function() {
					$("#slide").popup("show");
				}, 3000);
			}
			});
			</script>';
			echo $popup;
		}
	}
}

// Popup cookie language
function isar_cookie_language_button( $button_class = 'hide' ) {
    include_once( ABSPATH . 'wp-admin/includes/plugin.php' );
    if( is_plugin_active( 'polylang/polylang.php' )) {
        $previous_page_id = url_to_postid($_SERVER['HTTP_REFERER']);
        $previous_language_pll = pll_get_post_language($previous_page_id);	// works only with pages not archives
        $current_language_pll = pll_current_language();
        if(( $previous_language_pll != $current_language_pll  && $previous_language_pll != '' ) || $previous_language_pll == '' ) { ?>
            <button class="slide_open <?php echo $button_class; ?>"><?php _e( 'Language', 'twentyfourteen-child' ); ?></button>
            <br />
            <div id="slide" class="page-content">
                <p class="">
				<?php // Polylang current language
					echo __( 'You are in the section', 'twentyfourteen-child' ) .' "'. pll_current_language( 'locale' ) .'" '. __( 'of the website therefore you may find some mismatch of contents with other languages.', 'twentyfourteen-child' ); ?>
				</p>
                <ul class="list-inline comma">
				<?php // Polylang available languages
					_e( 'Available contents: ', 'twentyfourteen-child' );
					pll_the_languages(); ?>
				</ul>
				<br/>
                <button class="slide_close btn-block"><?php _e( 'Close', 'twentyfourteen-child' ); ?></button>
            </div>
        <?php
		}
	}
}

?>