fix inconsistency between number of total visits and first date

Date has been taken from the first data point of the output range while
the total number of hits is directly requested from the database.
Now the first date is also qeueried along with the taotal count.

CHANGELOG.md

@@ -1,6 +1,9 @@
 # Changelog
 All notable changes to this project will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org/).
 
+## unreleased
+* Fix date inconsistency for number of total visits (#150)
+
 ## 1.7.0
 * Fix JavaScript embedding when bots visit before caching (#84) (#86) 
 * Fix offset in visitor reporting due to different timezones between PHP and database (#117, props @sophiehuiberts)

inc/class-statify-dashboard.php

@@ -380,8 +380,9 @@ private static function _select_data() {
 						$current_date
 					)
 				),
-				'since_beginning' => $wpdb->get_var(
-					"SELECT COUNT(`created`) FROM `$wpdb->statify`"
+				'since_beginning' => $wpdb->get_row(
+					"SELECT COUNT(`created`) AS `count`, MIN(`created`) AS `date` FROM `$wpdb->statify`",
+					ARRAY_A
 				),
 			);
 		}

views/widget-front.php

@@ -101,11 +101,11 @@ class_exists( 'Statify' ) || exit;
 				</tr>
 				<tr>
 					<td class="b">
-						<?php echo (int) $stats['visit_totals']['since_beginning']; ?>
+						<?php echo (int) $stats['visit_totals']['since_beginning']['count']; ?>
 					</td>
 					<td class="t">
 						<?php esc_html_e( 'since', 'statify' ); ?>
-						<?php echo esc_html( date_i18n( get_option( 'date_format' ), strtotime( $stats['visits'][0]['date'] ) ) ); ?>
+						<?php echo esc_html( date_i18n( get_option( 'date_format' ), strtotime( $stats['visit_totals']['since_beginning']['date'] ) ) ); ?>
 					</td>
 				</tr>
 			</table>