author-bio.php

<?php
/**
 * Author description.
 */

if ( get_the_author_meta( 'description' ) ) :
	?>
<div class="author-info
	<?php
	if ( ! is_single() ) :
		?>
	bg-faded<?php endif; ?>">
	<div class="row">
		<div class="col-sm-12">
			<h2>
				<?php
					echo get_avatar( get_the_author_meta( 'user_email' ), apply_filters( 'themes_starter_author_bio_avatar_size', 48 ) ) . '&nbsp;';
					printf( esc_html__( 'About %s', 'my-theme' ), get_the_author() );
				?>
			</h2>
			<p class="author-description">
				<?php the_author_meta( 'description' ); ?>
			</p>
			<p class="author-links">
				<?php
				if ( ! empty( get_the_author_meta( 'user_url' ) ) ) {
					printf( '<a href="%s" class="www btn btn-secondary btn-sm">' . esc_html__( 'Website', 'my-theme' ) . '</a>', esc_url( get_the_author_meta( 'user_url' ) ) );
				}

					// Add new Profile fields for Users in functions.php
					$fields = array(
						array(
							'meta'  => 'facebook_profile',
							'label' => 'Facebook',
						),
						array(
							'meta'  => 'twitter_profile',
							'label' => 'Twitter',
						),
						array(
							'meta'  => 'linkedin_profile',
							'label' => 'LinkedIn',
						),
						array(
							'meta'  => 'xing_profile',
							'label' => 'Xing',
						),
						array(
							'meta'  => 'github_profile',
							'label' => 'GitHub',
						),
					);

					foreach ( $fields as $key => $data ) {
						$author_link = get_the_author_meta( esc_attr( $data['meta'] ) );
						if ( ! empty( $author_link ) ) {
							$label = $data['label'];
							echo ' <a href="' . esc_url( $author_link ) . '" class="btn btn-secondary btn-sm" title="' . esc_attr( $label ) . '">' . esc_html( $label ) . '</a> ';
						}
					}
					?>
			</p>
		</div><!-- /.col -->
	</div><!-- /.row -->
</div><!-- /.author-info -->
	<?php
	endif;
?>