woocommerce email replacement string

findreplace.php

<?php
function woocommerce_email_format_string_find( $find, $email ) {
	$find['customer_info'] = '{customer_info}';
	return $find;
}
add_filter( 'woocommerce_email_format_string_find', 'woocommerce_email_format_string_find', 10, 2 );

function woocommerce_email_format_string_replace( $replace, $email ) {
	$replace['customer_info'] = 'replacement string';
	return $replace;
}
add_filter( 'woocommerce_email_format_string_replace', 'woocommerce_email_format_string_find', 10, 2 );