Filter WooCommerce orders by payment methods in admin panel

filter-orders-by-payment-methods.php

<?php

/**
 * Create a list of all available payment methods, even inactive ones
 *
 * @return void
 */
function ywp_filter_orders_by_payment_method() {
	global $typenow;

	if ( 'shop_order' !== $typenow || ! current_user_can( 'edit_shop_orders' ) ) {
		return;
	}

	$gateways      = WC()->payment_gateways->payment_gateways();
	$gateways_list = sprintf(
		'<select name="ywp-payment-method"><option value="">%s</option>',
		esc_html__( 'All Payment Methods' ),
	);

	foreach ( $gateways as $id => $gateway ) {
		$gateways_list .= sprintf(
			'<option value="%s" %s>%s</option>',
			esc_attr( $id ),
			! empty( $_GET['ywp-payment-method'] ) ? selected( $id, $_GET['ywp-payment-method'], false ) : '',
			esc_html( $gateway->get_method_title() ),
		);
	}

	echo $gateways_list . '</select>';
}

add_action( 'restrict_manage_posts', 'ywp_filter_orders_by_payment_method', 20 );

/**
 * Change request query to do filter orders by selected payment method
 *
 * @param $query
 *
 * @return mixed
 */
function ywp_filter_orders_by_payment_method_query( $query ) {
	global $typenow;

	if ( 'shop_order' !== $typenow || ! current_user_can( 'edit_shop_orders' ) || empty( $_GET['ywp-payment-method'] ) ) {
		return $query;
	}

	$query['meta_key']   = '_payment_method';
	$query['meta_value'] = wc_clean( $_GET['ywp-payment-method'] );

	return $query;
}

add_filter( 'request', 'ywp_filter_orders_by_payment_method_query' );