functions.php

<?php
/*
 *  Author: Matthew T Rader | @matthew_t_rader
 *  URL: matthewtrader.com
 *  Custom functions, support, custom post types and more.
 */

/*------------------------------------*\
	External Modules/Files
\*------------------------------------*/

// Load any external files you have here

/*------------------------------------*\
	Theme Support
\*------------------------------------*/

if (!isset($content_width))
{
    $content_width = 1600;
}

if (function_exists('add_theme_support'))
{
    // Add Menu Support
    add_theme_support('menus');

    // Add Thumbnail Theme Support
    add_theme_support('post-thumbnails');
    add_image_size('large', 700, 500, true); // Large Thumbnail
    add_image_size('medium', 250, '', true); // Medium Thumbnail
    add_image_size('small', 120, '', true); // Small Thumbnail
    add_image_size('custom-size', 700, 200, true); // Custom Thumbnail Size call using the_post_thumbnail('custom-size');
    add_image_size('homepage-slider-mobile', 768, 768, true); // Large Thumbnail
    add_image_size('homepage-slider', 1600, 1600, true); // Large Thumbnail

    // Enables post and comment RSS feed links to head
    add_theme_support('automatic-feed-links');

    // Localisation Support
    load_theme_textdomain('ultraPhoto', get_template_directory() . '/languages');
}

/*------------------------------------*\
	Functions
\*------------------------------------*/

// Ultra Photo navigation
function ultraPhoto_nav()
{
	wp_nav_menu(
	array(
		'theme_location'  => 'header-menu',
		'menu'            => '',
		'container'       => 'div',
		'container_class' => 'menu-{menu slug}-container',
		'container_id'    => '',
		'menu_class'      => 'menu',
		'menu_id'         => '',
		'echo'            => true,
		'fallback_cb'     => 'wp_page_menu',
		'before'          => '',
		'after'           => '',
		'link_before'     => '',
		'link_after'      => '',
		'items_wrap'      => '<ul>%3$s</ul>',
		'depth'           => 0,
		'walker'          => ''
		)
	);
}

//Load Ultra Photo scripts (header.php)
function ultraPhoto_header_scripts()
{
//    if ($GLOBALS['pagenow'] != 'wp-login.php' && !is_admin()) {
//        
//        wp_register_script('vendor', get_template_directory_uri() . '/js/vendor/jquery.js', array('jquery'), '1.0.0'); // Custom scripts
//        wp_enqueue_script('vendor'); // Enqueue it!
//        
//         wp_register_script('ultraPhotoscripts', get_template_directory_uri() . '/scripts.js', array('jquery'), '1.0.0'); // Custom scripts
//        wp_enqueue_script('ultraPhotoscripts'); // Enqueue it!
//    
//    }
}

// Load Ultra Photo conditional scripts
function ultraPhoto_conditional_scripts()
{
//    if (is_page('pagenamehere')) {
//        wp_register_script('scriptname', get_template_directory_uri() . '/js/scriptname.js', array('jquery'), '1.0.0'); // Conditional script(s)
//        wp_enqueue_script('scriptname'); // Enqueue it!
//    }
}

// Load Ultra Photo styles
function ultraPhoto_styles()
{

//    wp_register_style('stylesheet', get_template_directory_uri() . '/style.css', array(), 'all');
//    wp_enqueue_style('stylesheet'); // Enqueue it!
}

// Register Ultra Photo Navigation
function register_ultraPhoto_menu()
{
    register_nav_menus(array( // Using array to specify more menus if needed
        'header-menu' => __('Header Menu', 'ultraPhoto'), // Main Navigation
        'sidebar-menu' => __('Sidebar Menu', 'ultraPhoto'), // Sidebar Navigation
        'extra-menu' => __('Extra Menu', 'ultraPhoto') // Extra Navigation if needed (duplicate as many as you need!)
    ));
}

// Remove the <div> surrounding the dynamic navigation to cleanup markup
function my_wp_nav_menu_args($args = '')
{
    $args['container'] = false;
    return $args;
}

// Remove Injected classes, ID's and Page ID's from Navigation <li> items
function my_css_attributes_filter($var)
{
    return is_array($var) ? array() : '';
}

// Remove invalid rel attribute values in the categorylist
function remove_category_rel_from_category_list($thelist)
{
    return str_replace('rel="category tag"', 'rel="tag"', $thelist);
}

// Add page slug to body class, love this - Credit: Starkers Wordpress Theme
function add_slug_to_body_class($classes)
{
    global $post;
    if (is_home()) {
        $key = array_search('blog', $classes);
        if ($key > -1) {
            unset($classes[$key]);
        }
    } elseif (is_page()) {
        $classes[] = sanitize_html_class($post->post_name);
    } elseif (is_singular()) {
        $classes[] = sanitize_html_class($post->post_name);
    }

    return $classes;
}


function mytheme_init() {
add_filter('comment_form_defaults','mytheme_comments_form_defaults');
}
add_action('after_setup_theme','mytheme_init');

function mytheme_comments_form_defaults($default) {
unset($default['comment_notes_after']);
return $default;
}

// If Dynamic Sidebar Exists
if (function_exists('register_sidebar'))
{
    // Define Sidebar Widget Area 1
    register_sidebar(array(
        'name' => __('Widget Area 1', 'ultraPhoto'),
        'description' => __('Description for this widget-area...', 'ultraPhoto'),
        'id' => 'widget-area-1',
        'before_widget' => '<div id="%1$s" class="%2$s">',
        'after_widget' => '</div>',
        'before_title' => '<h3>',
        'after_title' => '</h3>'
    ));

    // Define Sidebar Widget Area 2
    register_sidebar(array(
        'name' => __('Widget Area 2', 'ultraPhoto'),
        'description' => __('Description for this widget-area...', 'ultraPhoto'),
        'id' => 'widget-area-2',
        'before_widget' => '<div id="%1$s" class="%2$s">',
        'after_widget' => '</div>',
        'before_title' => '<h3>',
        'after_title' => '</h3>'
    ));
    // Define Posts Bottom Content Widget
    register_sidebar(array(
        'name' => __('Posts Bottom Content Widget', 'ultraPhoto'),
        'description' => __('For Content Appearing Below Posts Content', 'ultraPhoto'),
        'id' => 'post-bottom-content-widget',
        'before_widget' => '<div id="%1$s" class="%2$s">',
        'after_widget' => '</div>',
        'before_title' => '<h3>',
        'after_title' => '</h3>'
    ));
}

add_action('pre_get_posts', 'custom_per_page');

function custom_per_page(&$query) {
    
    if (is_post_type_archive()) {
        $query->set('posts_per_page', 24);
    }
    
    return;
}

// Remove wp_head() injected Recent Comment styles
function my_remove_recent_comments_style()
{
    global $wp_widget_factory;
    remove_action('wp_head', array(
        $wp_widget_factory->widgets['WP_Widget_Recent_Comments'],
        'recent_comments_style'
    ));
}

// Pagination for paged posts, Page 1, Page 2, Page 3, with Next and Previous Links, No plugin
function ultraPhoto_pagination()
{
    global $wp_query;
    $big = 999999999;
    echo paginate_links(array(
        'base' => str_replace($big, '%#%', get_pagenum_link($big)),
        'format' => '?paged=%#%',
        'current' => max(1, get_query_var('paged')),
        'total' => $wp_query->max_num_pages
    ));
}

// Custom Excerpts
function ultraPhoto_index($length) // Create 20 Word Callback for Index page Excerpts, call using ultraPhoto_excerpt('ultraPhoto_index');
{
    return 20;
}

// Create 40 Word Callback for Custom Post Excerpts, call using ultraPhoto_excerpt('ultraPhoto_custom_post');
function ultraPhoto_custom_post($length)
{
    return 40;
}

// Create the Custom Excerpts callback
function ultraPhoto_excerpt($length_callback = '', $more_callback = '')
{
    global $post;
    if (function_exists($length_callback)) {
        add_filter('excerpt_length', $length_callback);
    }
    if (function_exists($more_callback)) {
        add_filter('excerpt_more', $more_callback);
    }
    $output = get_the_excerpt();
    $output = apply_filters('wptexturize', $output);
    $output = apply_filters('convert_chars', $output);
    $output = '<p>' . $output . '</p>';
    echo $output;
}

// Custom View Article link to Post
function ultraPhoto_blank_view_article($more)
{
    global $post;
    return '... <a class="view-article" href="' . get_permalink($post->ID) . '">' . __('View Article', 'ultraPhoto') . '</a>';
}

// Remove Admin bar
function remove_admin_bar()
{
    return false;
}

// Remove 'text/css' from our enqueued stylesheet
function ultraPhoto_style_remove($tag)
{
    return preg_replace('~\s+type=["\'][^"\']++["\']~', '', $tag);
}

// Remove thumbnail width and height dimensions that prevent fluid images in the_thumbnail
function remove_thumbnail_dimensions( $html )
{
    $html = preg_replace('/(width|height)=\"\d*\"\s/', "", $html);
    return $html;
}

// Custom Gravatar in Settings > Discussion
function ultraPhotogravatar ($avatar_defaults)
{
    $myavatar = get_template_directory_uri() . '/img/gravatar.jpg';
    $avatar_defaults[$myavatar] = "Custom Gravatar";
    return $avatar_defaults;
}

// Threaded Comments
function enable_threaded_comments()
{
    if (!is_admin()) {
        if (is_singular() AND comments_open() AND (get_option('thread_comments') == 1)) {
            wp_enqueue_script('comment-reply');
        }
    }
}

// Custom Comments Callback
function ultraPhotocomments($comment, $args, $depth)
{
	$GLOBALS['comment'] = $comment;
	extract($args, EXTR_SKIP);

	if ( 'div' == $args['style'] ) {
		$tag = 'div';
		$add_below = 'comment';
	} else {
		$tag = 'li';
		$add_below = 'div-comment';
	}
?>
    <!-- heads up: starting < for the html tag (li or div) in the next line: -->
    <<?php echo $tag ?> <?php comment_class(empty( $args['has_children'] ) ? '' : 'parent') ?> id="comment-<?php comment_ID() ?>">
	<?php if ( 'div' != $args['style'] ) : ?>
	<div id="div-comment-<?php comment_ID() ?>" class="comment-body">
	<?php endif; ?>
	<div class="comment-author vcard">
	<?php if ($args['avatar_size'] != 0) echo get_avatar( $comment, $args['180'] ); ?>
	<?php printf(__('<cite class="fn">%s</cite> <span class="says">says:</span>'), get_comment_author_link()) ?>
	</div>
<?php if ($comment->comment_approved == '0') : ?>
	<em class="comment-awaiting-moderation"><?php _e('Your comment is awaiting moderation.') ?></em>
	<br />
<?php endif; ?>

	<div class="comment-meta commentmetadata"><a href="<?php echo htmlspecialchars( get_comment_link( $comment->comment_ID ) ) ?>">
		<?php
			printf( __('%1$s at %2$s'), get_comment_date(),  get_comment_time()) ?></a><?php edit_comment_link(__('(Edit)'),'  ','' );
		?>
	</div>

	<?php comment_text() ?>

	<div class="reply">
	<?php comment_reply_link(array_merge( $args, array('add_below' => $add_below, 'depth' => $depth, 'max_depth' => $args['max_depth']))) ?>
	</div>
	<?php if ( 'div' != $args['style'] ) : ?>
	</div>
	<?php endif; ?>
<?php }



/*------------------------------------*\
	Actions + Filters + ShortCodes
\*------------------------------------*/

// Add Actions
add_action('init', 'ultraPhoto_header_scripts'); // Add Custom Scripts to wp_head
add_action('wp_print_scripts', 'ultraPhoto_conditional_scripts'); // Add Conditional Page Scripts
add_action('get_header', 'enable_threaded_comments'); // Enable Threaded Comments
add_action('wp_enqueue_scripts', 'ultraPhoto_styles'); // Add Theme Stylesheet
add_action('init', 'register_ultraPhoto_menu'); // Add Ultra Photo Menu
add_action('init', 'create_post_type_ultraPhoto'); // Add our Ultra Photo Custom Post Type
add_action('widgets_init', 'my_remove_recent_comments_style'); // Remove inline Recent Comment Styles from wp_head()
add_action('init', 'ultraPhoto_pagination'); // Add our ultraPhoto Pagination

// Remove Actions
remove_action('wp_head', 'feed_links_extra', 3); // Display the links to the extra feeds such as category feeds
remove_action('wp_head', 'feed_links', 2); // Display the links to the general feeds: Post and Comment Feed
remove_action('wp_head', 'rsd_link'); // Display the link to the Really Simple Discovery service endpoint, EditURI link
remove_action('wp_head', 'wlwmanifest_link'); // Display the link to the Windows Live Writer manifest file.
remove_action('wp_head', 'index_rel_link'); // Index link
remove_action('wp_head', 'parent_post_rel_link', 10, 0); // Prev link
remove_action('wp_head', 'start_post_rel_link', 10, 0); // Start link
remove_action('wp_head', 'adjacent_posts_rel_link', 10, 0); // Display relational links for the posts adjacent to the current post.
remove_action('wp_head', 'wp_generator'); // Display the XHTML generator that is generated on the wp_head hook, WP version
remove_action('wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0);
remove_action('wp_head', 'rel_canonical');
remove_action('wp_head', 'wp_shortlink_wp_head', 10, 0);
remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
remove_action( 'wp_print_styles', 'print_emoji_styles' );


// Add Filters
add_filter('avatar_defaults', 'ultraPhotogravatar'); // Custom Gravatar in Settings > Discussion
add_filter('body_class', 'add_slug_to_body_class'); // Add slug to body class (Starkers build)
add_filter('widget_text', 'do_shortcode'); // Allow shortcodes in Dynamic Sidebar
add_filter('widget_text', 'shortcode_unautop'); // Remove <p> tags in Dynamic Sidebars (better!)
add_filter('wp_nav_menu_args', 'my_wp_nav_menu_args'); // Remove surrounding <div> from WP Navigation
// add_filter('nav_menu_css_class', 'my_css_attributes_filter', 100, 1); // Remove Navigation <li> injected classes (Commented out by default)
// add_filter('nav_menu_item_id', 'my_css_attributes_filter', 100, 1); // Remove Navigation <li> injected ID (Commented out by default)
// add_filter('page_css_class', 'my_css_attributes_filter', 100, 1); // Remove Navigation <li> Page ID's (Commented out by default)
add_filter('the_category', 'remove_category_rel_from_category_list'); // Remove invalid rel attribute
add_filter('the_excerpt', 'shortcode_unautop'); // Remove auto <p> tags in Excerpt (Manual Excerpts only)
add_filter('the_excerpt', 'do_shortcode'); // Allows Shortcodes to be executed in Excerpt (Manual Excerpts only)
add_filter('excerpt_more', 'ultraPhoto_blank_view_article'); // Add 'View Article' button instead of [...] for Excerpts
add_filter('style_loader_tag', 'ultraPhoto_style_remove'); // Remove 'text/css' from enqueued stylesheet
add_filter('post_thumbnail_html', 'remove_thumbnail_dimensions', 10); // Remove width and height dynamic attributes to thumbnails
add_filter('image_send_to_editor', 'remove_thumbnail_dimensions', 10); // Remove width and height dynamic attributes to post images

// Remove Filters
remove_filter('the_excerpt', 'wpautop'); // Remove <p> tags from Excerpt altogether

// Shortcodes
add_shortcode('ultraPhoto_shortcode_demo', 'ultraPhoto_shortcode_demo'); // You can place [ultraPhoto_shortcode_demo] in Pages, Posts now.
add_shortcode('ultraPhoto_shortcode_demo_2', 'ultraPhoto_shortcode_demo_2'); // Place [ultraPhoto_shortcode_demo_2] in Pages, Posts now.

// Shortcodes above would be nested like this -
// [ultraPhoto_shortcode_demo] [ultraPhoto_shortcode_demo_2] Here's the page title! [/ultraPhoto_shortcode_demo_2] [/ultraPhoto_shortcode_demo]

/*------------------------------------*\
	Custom Post Types
\*------------------------------------*/

// Create 1 Custom Post type for a Demo, called ultraPhoto-Blank
function create_post_type_ultraPhoto()
{
    register_taxonomy_for_object_type('category', 'ultraPhoto-blank'); // Register Taxonomies for Category
    register_taxonomy_for_object_type('post_tag', 'ultraPhoto-blank');
    register_post_type('ultraPhoto-blank', // Register Custom Post Type
        array(
        'labels' => array(
            'name' => __('Ultra Photo Custom Post', 'ultraPhoto'), // Rename these to suit
            'singular_name' => __('Ultra Photo Custom Post', 'ultraPhoto'),
            'add_new' => __('Add New', 'ultraPhoto'),
            'add_new_item' => __('Add New Ultra Photo Custom Post', 'ultraPhoto'),
            'edit' => __('Edit', 'ultraPhoto'),
            'edit_item' => __('Edit Ultra Photo Custom Post', 'ultraPhoto'),
            'new_item' => __('New Ultra Photo Custom Post', 'ultraPhoto'),
            'view' => __('View Ultra Photo Custom Post', 'ultraPhoto'),
            'view_item' => __('View Ultra Photo Custom Post', 'ultraPhoto'),
            'search_items' => __('Search Ultra Photo Custom Post', 'ultraPhoto'),
            'not_found' => __('No Ultra Photo Custom Posts found', 'ultraPhoto'),
            'not_found_in_trash' => __('No Ultra Photo Custom Posts found in Trash', 'ultraPhoto')
        ),
        'public' => false,
        'hierarchical' => true, // Allows your posts to behave like Hierarchy Pages
        'has_archive' => true,
        'supports' => array(
            'title',
            'editor',
            'excerpt',
            'thumbnail'
        ), // Go to Dashboard Custom Ultra Photo post for supports
        'can_export' => true, // Allows export in Tools > Export
        'taxonomies' => array(
            'post_tag',
            'category'
        ) // Add Category and Post Tags support
    ));
}

/*------------------------------------*\
	ShortCode Functions
\*------------------------------------*/

// Shortcode Demo with Nested Capability
function ultraPhoto_shortcode_demo($atts, $content = null)
{
    return '<div class="shortcode-demo">' . do_shortcode($content) . '</div>'; // do_shortcode allows for nested Shortcodes
}

// Shortcode Demo with simple <h2> tag
function ultraPhoto_shortcode_demo_2($atts, $content = null) // Demo Heading H2 shortcode, allows for nesting within above element. Fully expandable.
{
    return '<h2>' . $content . '</h2>';
}

//add hatom data
function add_suf_hatom_data($content) {
    $t = get_the_modified_time('F jS, Y');
    $author = get_the_author();
    $title = get_the_title();
if (is_home() || is_singular() || is_archive() ) {
        $content .= '<div class="hatom-extra"><span class="entry-title">'.$title.'</span> was last modified: <span class="updated"> '.$t.'</span> by <span class="author vcard"><span class="fn">'.$author.'</span></span></div>';
    }
    return $content;
    }
add_filter('the_content', 'add_suf_hatom_data');

function add_alt_tags($content)
{
        global $post;
        preg_match_all('/<img (.*?)\/>/', $content, $images);
        if(!is_null($images))
        {
                foreach($images[1] as $index => $value)
                {
                        if(!preg_match('/alt=/', $value))
                        {
                                $new_img = str_replace('<img', '<img alt="'.$post->post_title.'"', $images[0][$index]);
                                $content = str_replace($images[0][$index], $new_img, $content);
                        }
                }
        }
        return $content;
}
add_filter('the_content', 'add_alt_tags', 99999);

function jetpackme_filter_exclude_category( $filters ) {
    $filters[] = array( 'not' =>
      array( 'term' => array( 'category.slug' => 'no-related' ) )
    );
    return $filters;
}
add_filter( 'jetpack_relatedposts_filter_filters', 'jetpackme_filter_exclude_category' );


add_filter('post_gallery', 'my_post_gallery', 10, 2);
function my_post_gallery($output, $attr) {
    global $post;

    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,
        'itemtag' => 'dl',
        'icontag' => 'dt',
        'captiontag' => 'dd',
        'columns' => 3,
        'size' => 'thumbnail',
        'include' => '',
        'exclude' => ''
    ), $attr));

    $id = intval($id);
    if ('RAND' == $order) $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];
        }
    }

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

    // Here's your actual output, you may customize it to your need
    $output = "<div class=\"gallery\">\n";
    
    $thumb_id = get_post_thumbnail_id(get_the_ID()); 
    $alt = get_post_meta($thumb_id, '_wp_attachment_image_alt', true); if( $alt ): endif;

    // Now you loop through each attachment
    foreach ($attachments as $id => $attachment) {
        // Fetch the thumbnail (or full image, it's up to you)
//      $img = wp_get_attachment_image_src($id, 'medium');
//      $img = wp_get_attachment_image_src($id, 'my-custom-image-size');
        $img = wp_get_attachment_image_src($id, 'full');

        $output .= "<amp-img  layout=\"responsive\" src=\"{$img[0]}\" width=\"{$img[1]}\" height=\"{$img[2]}\" alt=\"{$alt}\" />\n";
        $output .= "</amp-img>\n";
    }

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

    return $output;
}

// Remove jQuery Migrate Script from header and Load jQuery from Google API
function crunchify_stop_loading_wp_embed_and_jquery() {
	if (!is_admin()) {
		wp_deregister_script('wp-embed');
		wp_deregister_script('jquery');  // Bonus: remove jquery too if it's not required
	}
}
add_action('init', 'crunchify_stop_loading_wp_embed_and_jquery');


function ultraPhoto_theme_customizer( $wp_customize ) {
    
    
    // Add logo image field to customizer
    $wp_customize->add_setting( 'ultraPhoto_logo' );
    
    $wp_customize->add_control( new WP_Customize_Image_Control( $wp_customize, 'ultraPhoto_logo', array(
        'label'    => __( 'Logo', 'ultraPhoto' ),
        'section'  => 'title_tagline',
        'settings' => 'ultraPhoto_logo',
    ) ) );
    
    
    // Add logo width to customizer
    $wp_customize->add_setting( 'ultraPhoto_number_setting_w', array(
      'capability' => 'edit_theme_options',
      'sanitize_callback' => 'ultraPhoto_sanitize_number_absint',
      'default' => 7,
    ) );

    $wp_customize->add_control( 'ultraPhoto_number_setting_w', array(
      'type' => 'number',
      'section'  => 'title_tagline',
      'label' => __( 'Logo Width' ),
      'description' => __( "Add height and width to make the logo maintain it's ratio for amp" ),
    ) );
    
    
    // Add logo height to customizer
    $wp_customize->add_setting( 'ultraPhoto_number_setting_h', array(
      'capability' => 'edit_theme_options',
      'sanitize_callback' => 'ultraPhoto_sanitize_number_absint',
      'default' => 5,
    ) );

    $wp_customize->add_control( 'ultraPhoto_number_setting_h', array(
      'type' => 'number',
      'section'  => 'title_tagline',
      'label' => __( 'Logo Height' ),
    ) );
    
    

    function ultraPhoto_sanitize_number_absint( $number, $setting ) {
      // Ensure $number is an absolute integer (whole number, zero or greater).
      $number = absint( $number );

      // If the input is an absolute integer, return it; otherwise, return the default
      return ( $number ? $number : $setting->default );
    }
    
}
add_action( 'customize_register', 'ultraPhoto_theme_customizer' );

/**
 *
 * @param Checks for ssl returns https if needed
 * @param int $p
 * @return filter
 */
function get_theme_mod_img($mod_name){
     return str_replace(array('http:', 'https:'), '', get_theme_mod($mod_name));
}

?>