functions.php

<?php

// functions.php

function learningWordPress_resources() {
	
	wp_enqueue_style('style', get_stylesheet_uri());
	
}

add_action('wp_enqueue_scripts', 'learningWordPress_resources');



// Get top ancestor
function get_top_ancestor_id()  {
    
    global $post;
    
    if ($post->post_parent) {
        $ancestors = array_reverse(get_post_ancestors($post->ID));
        return $ancestors[0];
    }
    
    // If doesn't have a parent page
    return $post->ID;
}

// Does page have children?
function has_children() {
    
    global $post;
    
    $pages = get_pages('child_of=' . $post->ID);
    return count($pages);
    
}

// Customize excerpt word count length
function custom_excerpt_length() {
    return 25;
}

add_filter('excerpt_length', 'custom_excerpt_length');


// Theme Setup
function learningWordPress_setup() {
    
    // Navigation Menus
    register_nav_menus(array(
        'primary' => __( 'Primary Menu'),
        'footer' => __( 'Footer Menu'),
    ));    
    
    // Add featured image support
    add_theme_support('post-thumbnails');
    
    // Register new image sizes
    add_image_size('small-thumbnail', 180, 120, true); // hard crop
    add_image_size('banner-image', 920, 210, array('left','top'));
    add_image_size('latest-thumb', 100, 100, true);
    
    // Add post format support
    add_theme_support('post-formats', array('aside', 'gallery', 'link'));
    
    
}

add_action('after_setup_theme', 'learningWordPress_setup');


// Add our widget locations
function ourWidgetsInit() {
    
    // register sidebar widget locations
    register_sidebar( array(
        'name' => 'Sidebar',
        'id' => 'sidebar1',
        'before_widget' => '<div class="widget_item">',
        'after_widget' => '</div>',
        'before_title' => '<h4 class="my-special-class">',
        'after_title' => '</h4>'
    ));

    register_sidebar( array(
        'name' => 'Footer Area 1',
        'id' => 'footer1',
        'before_widget' => '<div class="widget_item">',
        'after_widget' => '</div>',
        'before_title' => '<h4 class="my-special-class">',
        'after_title' => '</h4>'
    ));

    register_sidebar( array(
        'name' => 'Footer Area 2',
        'id' => 'footer2',
        'before_widget' => '<div class="widget_item">',
        'after_widget' => '</div>',
    ));

    register_sidebar( array(
        'name' => 'Footer Area 3',
        'id' => 'footer3',
        'before_widget' => '<div class="widget_item">',
        'after_widget' => '</div>',
    ));

    register_sidebar( array(
        'name' => 'Footer Area 4',
        'id' => 'footer4',
        'before_widget' => '<div class="widget_item">',
        'after_widget' => '</div>',
    ));
}

add_action('widgets_init', 'ourWidgetsInit');