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function wp_ajax_wp_privacy_export_personal_data() {

	if ( empty( $_POST['id'] ) ) {
		wp_send_json_error( __( 'Missing request ID.' ) );
	}

	$request_id = (int) $_POST['id'];

	if ( $request_id < 1 ) {
		wp_send_json_error( __( 'Invalid request ID.' ) );
	}

	if ( ! current_user_can( 'export_others_personal_data' ) ) {
		wp_send_json_error( __( 'Sorry, you are not allowed to perform this action.' ) );
	}

	check_ajax_referer( 'wp-privacy-export-personal-data-' . $request_id, 'security' );

	// Get the request.
	$request = wp_get_user_request( $request_id );

	if ( ! $request || 'export_personal_data' !== $request->action_name ) {
		wp_send_json_error( __( 'Invalid request type.' ) );
	}

	$email_address = $request->email;
	if ( ! is_email( $email_address ) ) {
		wp_send_json_error( __( 'A valid email address must be given.' ) );
	}

	if ( ! isset( $_POST['exporter'] ) ) {
		wp_send_json_error( __( 'Missing exporter index.' ) );
	}

	$exporter_index = (int) $_POST['exporter'];

	if ( ! isset( $_POST['page'] ) ) {
		wp_send_json_error( __( 'Missing page index.' ) );
	}

	$page = (int) $_POST['page'];

	$send_as_email = isset( $_POST['sendAsEmail'] ) ? ( 'true' === $_POST['sendAsEmail'] ) : false;

	/**
	 * Filters the array of exporter callbacks.
	 *
	 * @since 4.9.6
	 *
	 * @param array $args {
	 *     An array of callable exporters of personal data. Default empty array.
	 *
	 *     @type array ...$0 {
	 *         Array of personal data exporters.
	 *
	 *         @type callable $callback               Callable exporter function that accepts an
	 *                                                email address and a page number and returns an
	 *                                                array of name => value pairs of personal data.
	 *         @type string   $exporter_friendly_name Translated user facing friendly name for the
	 *                                                exporter.
	 *     }
	 * }
	 */
	$exporters = apply_filters( 'wp_privacy_personal_data_exporters', array() );

	if ( ! is_array( $exporters ) ) {
		wp_send_json_error( __( 'An exporter has improperly used the registration filter.' ) );
	}

	// Do we have any registered exporters?
	if ( 0 < count( $exporters ) ) {
		if ( $exporter_index < 1 ) {
			wp_send_json_error( __( 'Exporter index cannot be negative.' ) );
		}

		if ( $exporter_index > count( $exporters ) ) {
			wp_send_json_error( __( 'Exporter index is out of range.' ) );
		}

		if ( $page < 1 ) {
			wp_send_json_error( __( 'Page index cannot be less than one.' ) );
		}

		$exporter_keys = array_keys( $exporters );
		$exporter_key  = $exporter_keys[ $exporter_index - 1 ];
		$exporter      = $exporters[ $exporter_key ];

		if ( ! is_array( $exporter ) ) {
			wp_send_json_error(
				/* translators: %s: Exporter array index. */
				sprintf( __( 'Expected an array describing the exporter at index %s.' ), $exporter_key )
			);
		}

		if ( ! array_key_exists( 'exporter_friendly_name', $exporter ) ) {
			wp_send_json_error(
				/* translators: %s: Exporter array index. */
				sprintf( __( 'Exporter array at index %s does not include a friendly name.' ), $exporter_key )
			);
		}

		$exporter_friendly_name = $exporter['exporter_friendly_name'];

		if ( ! array_key_exists( 'callback', $exporter ) ) {
			wp_send_json_error(
				/* translators: %s: Exporter friendly name. */
				sprintf( __( 'Exporter does not include a callback: %s.' ), esc_html( $exporter_friendly_name ) )
			);
		}

		if ( ! is_callable( $exporter['callback'] ) ) {
			wp_send_json_error(
				/* translators: %s: Exporter friendly name. */
				sprintf( __( 'Exporter callback is not a valid callback: %s.' ), esc_html( $exporter_friendly_name ) )
			);
		}

		$callback = $exporter['callback'];
		$response = call_user_func( $callback, $email_address, $page );

		if ( is_wp_error( $response ) ) {
			wp_send_json_error( $response );
		}

		if ( ! is_array( $response ) ) {
			wp_send_json_error(
				/* translators: %s: Exporter friendly name. */
				sprintf( __( 'Expected response as an array from exporter: %s.' ), esc_html( $exporter_friendly_name ) )
			);
		}

		if ( ! array_key_exists( 'data', $response ) ) {
			wp_send_json_error(
				/* translators: %s: Exporter friendly name. */
				sprintf( __( 'Expected data in response array from exporter: %s.' ), esc_html( $exporter_friendly_name ) )
			);
		}

		if ( ! is_array( $response['data'] ) ) {
			wp_send_json_error(
				/* translators: %s: Exporter friendly name. */
				sprintf( __( 'Expected data array in response array from exporter: %s.' ), esc_html( $exporter_friendly_name ) )
			);
		}

		if ( ! array_key_exists( 'done', $response ) ) {
			wp_send_json_error(
				/* translators: %s: Exporter friendly name. */
				sprintf( __( 'Expected done (boolean) in response array from exporter: %s.' ), esc_html( $exporter_friendly_name ) )
			);
		}
	} else {
		// No exporters, so we're done.
		$exporter_key = '';

		$response = array(
			'data' => array(),
			'done' => true,
		);
	}

	/**
	 * Filters a page of personal data exporter data. Used to build the export report.
	 *
	 * Allows the export response to be consumed by destinations in addition to Ajax.
	 *
	 * @since 4.9.6
	 *
	 * @param array  $response        The personal data for the given exporter and page number.
	 * @param int    $exporter_index  The index of the exporter that provided this data.
	 * @param string $email_address   The email address associated with this personal data.
	 * @param int    $page            The page number for this response.
	 * @param int    $request_id      The privacy request post ID associated with this request.
	 * @param bool   $send_as_email   Whether the final results of the export should be emailed to the user.
	 * @param string $exporter_key    The key (slug) of the exporter that provided this data.
	 */
	$response = apply_filters( 'wp_privacy_personal_data_export_page', $response, $exporter_index, $email_address, $page, $request_id, $send_as_email, $exporter_key );

	if ( is_wp_error( $response ) ) {
		wp_send_json_error( $response );
	}

	wp_send_json_success( $response );
}