Footer.php file for AMP pages template for WordPress site

footer.php

<?php
/**
 * Replace the footer text on your AMP pages
 *
 * This function will remove the default text on your AMP footer and will customize it for your site. 
 * Add this to your amp folder under your active theme.
 *
 * @author  MetaBlogue
 * @license GPL-2.0+
 * @link    https://metablogue.com/configure-enable-amp-wordpress/
 */
?>
<footer class="amp-wp-footer">
	<div>
		<h2><a href="<?php echo esc_url( esc_html__( 'https://example.com/blog/', 'amp' ) ); ?>">
				<?php
				// translators: %s is Blog.
				echo esc_html( sprintf( __( '%s', 'amp' ), 'Blog' ) );
				?> 
			</a></h2>
		<p><?php echo esc_html( wptexturize( do_shortcode('[footer_copyright first="2017"]') ) ); ?>
			&middot; <a href="<?php echo esc_url( esc_html__( 'https://example.com/', 'amp' ) ); ?>">
				<?php
				// translators: %s is Example.
				echo esc_html( sprintf( __( '%s', 'amp' ), 'Example' ) );
				?> 
			</a> &middot; All Rights Reserved
		</p>
		<a href="#top" class="back-to-top"><?php esc_html_e( 'Back to top', 'amp' ); ?></a>
	</div>
</footer>