WooCommerce - Add Saudi Riyal currency and symbol

plugin.php

<?php

function wc_add_saudi_riyal_currency( $currencies ) {
	$currencies['SAR'] = 'Saudi Riyal';

	return $currencies;
}

add_filter( 'woocommerce_currencies', 'wc_add_saudi_riyal_currency' );

function wc_add_saudi_riyal_symbol( $symbol, $currency ) {
	return 'SAR' === $currency ? '&#x631;.&#x633;' : $symbol;
}

add_filter( 'woocommerce_currency_symbol', 'wc_add_saudi_riyal_symbol', 10, 2 );