WooCommerce - Shortcode to list BACS accounts on checkout page

bacs-account-shortcode.php

<?php
/* Usage: Put [bacs_account_details] shortcode in "WooCommerce > Settings > Checkout > BACS > Description field" */

/* This function outputs the BACS account details */
function list_bacs_accounts() {
$accounts = get_option( 'woocommerce_bacs_accounts');

	if ( $accounts ) {
		$list_accounts = '<table>
			<thead>
				<th>Account Name</th>
				<th>Account Number</th>
				<th>Bank Name</th>
				<th>IFSC</th>
				<th>IBAN</th>
				<th>BIC / Swift</th>
			</thead>';

		for ( $i = 0; $i < sizeof($accounts); $i++ ) {
			$list_accounts .= '
			<tr class="account">
				<td><p>' . wp_unslash( $accounts[$i]['account_name'] ) . '</p></td>
				<td><p>' . $accounts[$i]['account_number'] . '</p></td>
				<td><p>' . wp_unslash( $accounts[$i]['bank_name'] ) . '</p></td>
				<td><p>' . $accounts[$i]['sort_code'] . '</p></td>
				<td><p>' . $accounts[$i]['iban'] . '</p></td>
				<td><p>' . $accounts[$i]['bic'] . '</p></td>
			</tr>';
		}
		$list_accounts .= '</table>';
	}
    return $list_accounts;
}
add_shortcode( 'bacs_account_details', 'list_bacs_accounts' );

/* This function simply passess description field to the_content filter so that our shortcode is handled. 
By default it does not handle any shortcodes. */
function gateway_desc_schortcode_handler( $description , $id ) {
	global $woocommerce;
	return apply_filters( 'the_content', $description );
}
add_filter( 'woocommerce_gateway_description', 'gateway_desc_schortcode_handler');
?>