woocommerce / woocommerce-gateway-stripe

		$billing_state    = ! empty( $_POST['billing_state'] ) ? wc_clean( $_POST['billing_state'] ) : '';

		$shipping_state   = ! empty( $_POST['shipping_state'] ) ? wc_clean( $_POST['shipping_state'] ) : '';

		if ( $billing_state && $billing_country ) {

			$valid_states = WC()->countries->get_states( $billing_country );

			// Valid states found for country.

			if ( ! empty( $valid_states ) && is_array( $valid_states ) && sizeof( $valid_states ) > 0 ) {

				foreach ( $valid_states as $state_abbr => $state ) {

					if ( preg_match( '/' . preg_quote( $state ) . '/i', $billing_state ) ) {

						$_POST['billing_state'] = $state_abbr;

					}

				}

			}

		}

		if ( $shipping_state && $shipping_country ) {

			$valid_states = WC()->countries->get_states( $shipping_country );

			}

		}

		if ( $shipping_state && $shipping_country ) {

			$valid_states = WC()->countries->get_states( $shipping_country );

			// Valid states found for country.

			if ( ! empty( $valid_states ) && is_array( $valid_states ) && sizeof( $valid_states ) > 0 ) {

				foreach ( $valid_states as $state_abbr => $state ) {

					if ( preg_match( '/' . preg_quote( $state ) . '/i', $shipping_state ) ) {

						$_POST['shipping_state'] = $state_abbr;

					}

				}

			}

		}

	}

	/**