Custom no access message that includes membership level names

my_pmpro_no_access_message_body.php

<?php
/**
 * Custom "no access" message that includes membership level names
 *
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
function my_pmpro_custom_no_access_message_body( $body, $required_level_ids ) {
	
	$pmpro_levels = pmpro_getAllLevels();
	$required_level_count = sizeof( $required_level_ids );
	$required_level_names = array();
	
	foreach( $pmpro_levels as $level_id => $level ) {
		if( in_array( $level_id, $required_level_ids ) ) {
			$required_level_names[] = $level->name;
		}
	}
	
	if ( $required_level_count > 1 ) {
		$levels_string = implode( ', ', array_slice( $required_level_names, 0, $required_level_count - 1 ) ) . ' and ' . end( $required_level_names );
	} else {
		$levels_string = $required_level_names[0];
	}

	$body = "This content is for {$levels_string} members only.";

	return $body;
}
add_filter( 'pmpro_no_access_message_body', 'my_pmpro_custom_no_access_message_body', 10, 2 );