Add symbol United Arab Emirates Dirham

functions.php

<?php
// Add symbol United Arab Emirates Dirham
add_filter( 'woocommerce_currencies', 'add_custom_currency' );
function add_custom_currency( $currencies ) {
	$currencies['AED'] = __( 'United Arab Emirates Dirham', 'woocommerce' );
	return $currencies;
}

add_filter('woocommerce_currency_symbol', 'add_custom_currency_symbol', 10, 2);
function add_custom_currency_symbol( $currency_symbol, $currency ) {
	switch( $currency ) {
		case 'AED': $currency_symbol = 'AED '; break;
	}
	return $currency_symbol;
}