Creating An Authors Widget

display-skeleton.php

public function widget( $args, $instance ) {

	echo $args['before_widget'];

	if( !empty( $instance['title'] ) ) {
		echo $args['before_title'] . apply_filters( 'widget_title', $instance['title'], $instance, $this->id_base ) . $args['after_title'];
	}
	
	// Main Widget Code Here

	echo $args['after_widget'];

}

enqueue-style.php

wp_enqueue_style( 'my-author-list' );

enqueue_action.php

add_action( 'wp_enqueue_scripts', array( $this, 'widget_styles' ) );

form.php

public function form( $instance ) {

	// Field Values
	$title = ( !empty( $instance['title'] ) ) ? $instance['title'] : '';
	$count = ( !empty( $instance['count'] ) ) ? $instance['count'] : 5;
	$orderby = ( !empty( $instance['orderby'] ) ) ? $instance['orderby'] : 'post_count';
	$order = ( !empty( $instance['order'] ) ) ? $instance['order'] : 'desc';

	// Field Options
	$orderby_options = array(
		'ID' => 'ID'
		'email' => 'Email'
		'post_count' => 'Post Count'
	);

	$order_options = array(
		'desc' => 'Descending',
		'asc' => 'Ascending'
	);

?>

<div class='unread-posts'>
    <p>
        <label for="<?php echo $this->get_field_name( 'title' ); ?>">Title: </label>
        <input class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" type="text" value="<?php echo esc_attr( $title ); ?>" />
    </p>

    <p>
        <label for="<?php echo $this->get_field_name( 'count' ); ?>">Authors To Show: </label>
        <input class="widefat" id="<?php echo $this->get_field_id( 'count' ); ?>" name="<?php echo $this->get_field_name( 'count' ); ?>" type="text" value="<?php echo esc_attr( $count ); ?>" />
    </p>

    <p>
        <label for="<?php echo $this->get_field_name( 'orderby' ); ?>">Order By: </label>
        <select class='widefat'  id="<?php echo $this->get_field_id( 'orderby' ); ?>" name="<?php echo $this->get_field_name( 'orderby' ); ?>">
            <?php foreach( $orderby_options as $value => $name ) : ?>
                <option <?php selected( $orderby, $value ) ?> value='<?php echo $value ?>'><?php echo $name ?></option>
            <?php endforeach ?>
        </select>
    </p>
    
    <p>
        <label for="<?php echo $this->get_field_name( 'order' ); ?>">Order By: </label>
        <select class='widefat'  id="<?php echo $this->get_field_id( 'order' ); ?>" name="<?php echo $this->get_field_name( 'order' ); ?>">
            <?php foreach( $orderby_options as $value => $name ) : ?>
                <option <?php selected( $order, $value ) ?> value='<?php echo $value ?>'><?php echo $name ?></option>
            <?php endforeach ?>
        </select>
    </p>
    

</div>
<?php
}

get_users.php

<?php $args = array(
	'blog_id'      => $GLOBALS['blog_id'],
	'role'         => '',
	'meta_key'     => '',
	'meta_value'   => '',
	'meta_compare' => '',
	'meta_query'   => array(),
	'include'      => array(),
	'exclude'      => array(),
	'orderby'      => 'login',
	'order'        => 'ASC',
	'offset'       => '',
	'search'       => '',
	'number'       => '',
	'count_total'  => false,
	'fields'       => 'all',
	'who'          => ''
 ); ?>

$args = array(
	'who' => 'authors',
	'number' => $instance['count'],
	'orderby' => $instance['orderby'],
	'order' => $instance['order'],
);

$users = get_users( $args );

plugin.php

<?php
/**
* Plugin Name: My Author List
* Plugin URI: http://danielpataki.com
* Description: This widget displays a list of authors.
* Version: 1.0.0
* Author: Daniel Pataki
* Author URI: http://danielpataki.com
* License: GPL2
*/

register-style.php

function widget_styles() {
	wp_register_style( 'my-author-list', plugin_dir_url( __FILE__ ) . 'my-author-list.css' );
}

restrict-widget.php

add_action( 'ta/post_query', 'my_ta_post_query', 10, 2 );
function my_ta_post_query( $query_args, $instance ) {
	$query_args['date_query'] = array(
		array(
			'dayofweek' => array( 2,6 ),
			'compare'   => 'NOT BETWEEN',
		),
	);
	$query_args['category_name'] = 'featured';
	
	return $query_args;
}

user_loop.php

if( !empty( $users ) ) {
	echo '<ul>';
	foreach( $users as $user ) {
		echo '<li>';
		echo '<a href="' . $user->user_url . '">' . get_avatar( $user->ID, 64 ) . '</a>';
		echo '<a href="' . $user->user_url . '">' . $user->display_name . '</a>';
		echo '</li>';
	}
	echo '</ul>';
}
else {
	echo 'No Users To Show';
}

widget-skeleton.php

class My_Author_List_Widget extends WP_Widget {

	public function __construct() {
		$widget_details = array(
			'classname' => 'my-author-list',
			'description' => 'A simple author display widget'
		);
	
		parent::__construct( 'my-author-list', 'My Author List', $widget_details );
	
	}

	public function form( $instance ) {
	
	}


	public function widget( $args, $instance ) {
	
	}
  
	public function update( $new_instance, $old_instance ) {
	
	}

}

add_action( 'widgets_init', function(){
     register_widget( 'My_Author_List_Widget' );
});