Redirect Pages with /AMP/ to a different Wordpress Page Template on HikingGuy.com

functions.php

// ****************************************************************************************************	
// AMP support

	define( 'AMP_QUERY_VAR', apply_filters( 'amp_query_var', 'amp' ) );
	
	add_rewrite_endpoint( AMP_QUERY_VAR, EP_PERMALINK );

	add_filter( 'template_include', 'amp_page_template', 99 );

	function amp_page_template( $template ) {
	
		if( get_query_var( AMP_QUERY_VAR, false ) !== false ) {
 

			if ( is_single() ) {

        // amp-single.php is my page template for AMP
		
				$template = get_template_directory() .  '/amp-single.php';

			} 
			
		}

		return $template;
	}