Hook the GDPR exporter into WordPress

gdpr.php

<?php
/**
 * Hook function adding the wp-email-capture array to the GDPR friendly plugin exporter.
 *
 * @param  array $exporters All current Exporters
 * @return array            All exporters plus the WP Email Capture one.
 */
function wp_email_capture_register_plugin_exporter( $exporters ) {
	$exporters['wp-email-capture'] = array(
		'exporter_friendly_name' => __( 'WP Email Capture' ),
		'callback'               => 'wp_email_capture_plugin_exporter',
	);
	return $exporters;
} add_filter( 'wp_privacy_personal_data_exporters', 'wp_email_capture_register_plugin_exporter', 10 );

/**
 * This function links into the GDPR exporter, meaning we can begin to export registered today.
 *
 * @param  string  $email_address The email address we are looking for.
 * @param  integer $page          The page of data we are grabbing.
 * @return array                  An array of data we will need to find.
 */
function wp_email_capture_plugin_exporter( $email_address, $page = 1 ) {

	$number = 500; // Limit us to avoid timing out
	$page   = (int) $page;

	$export_items       = array();
	$emaildatatocheck[] = wp_email_capture_get_data_from_email_temp( $email_address );
	$emaildatatocheck[] = wp_email_capture_get_data_from_email_main( $email_address );
	$x                  = '';

	foreach ( $emaildatatocheck as $emaildatatemp ) {

		$datatocheck = array();
		$columns     = get_object_vars( $emaildatatemp[0] );

		foreach ( $columns as $column => $value ) {
			$datatocheck[] = $column;
		}

		foreach ( (array) $emaildatatemp as $emaildata ) {

			$x++;

			$item_id = "wp-email-capture-{$emaildata->id}";

			// Core group IDs include 'comments', 'posts', etc.
			// But you can add your own group IDs as needed
			$group_id = 'emailcapture';

			// Optional group label. Core provides these for core groups.
			// If you define your own group, the first exporter to
			// include a label will be used as the group label in the
			// final exported report
			$group_label = __( 'WP Email Capture Data' );

			$data = array();

			// Plugins can add as many items in the item data array as they want
			foreach ( $datatocheck as $header ) {

				$data[] = array(
					'name'  => $header,
					'value' => $emaildata->$header,
				);

			}

			$export_items[] = array(
				'group_id'    => $group_id,
				'group_label' => $group_label,
				'item_id'     => $item_id,
				'data'        => $data,
			);
		}
	}

	$done = $x < $number;
	return array(
		'data' => $export_items,
		'done' => $done,
	);

}