Add snippet to show a list of all authors #hacktoberfest22

README.md

@@ -19,3 +19,4 @@ Below is the list of useful WordPress Snippets that you can use when developing
 + [Remove inline styling from tag cloud](https://github.com/dalenguyen/wordpress-snippets/blob/master/src/remove_inline_styling_from_tag_cloud.php)
 + [Show related posts on single](https://github.com/wajidalitabassum143/wordpress-snippets/blob/master/src/show_related_posts_on_single.php)
 + [Shortcode: show popular blog posts based on cat](https://github.com/wajidalitabassum143/wordpress-snippets/blob/master/src/show_popular_blog_posts_based_on_cat_shortcode.php)
++ [List all authors of a blog grouped by first name with a single letter as a header character](https://github.com/wajidalitabassum143/wordpress-snippets/blob/master/src/list_authors_alphabetically.php)

src/list_authors_alphabetically.php

@@ -0,0 +1,30 @@
+<?php
+
+//* List all authors of a blog grouped by first name with a single letter as a header character.
+
+function list_authors_alphabetically() {
+
+	$users = get_users( 'orderby=user_login&role=author' ); 
+
+	$first_letter = '';
+
+	foreach( $users as $user ) {
+
+		$space = strpos( $user->user_login, ' ' );
+		$letter = substr( $user->user_login, 0, 1 );
+		$letter = strtoupper( $letter );
+
+		if ( $letter != $first_letter ) {
+
+			$first_letter = $letter;
+
+			echo "<h4 id='ft_contrib_alphaletter_$first_letter'> $first_letter </h4>";
+
+		}
+
+		echo '<a href="' . get_author_posts_url( $user->ID, $user->user_nicename ) . '" title="' . $user->display_name . '">' . $user->display_name . '</a>';
+
+		echo "<br>";
+	}
+
+}