Sync plugins from current page

Signed-off-by: Adrian Nöthlich <git@promasu.tech>

wp-content/plugins/wp-statistics/includes/functions/purge-hits.php

@@ -0,0 +1,67 @@
+<?php
+function wp_statistics_purge_visitor_hits( $purge_hits ) {
+	GLOBAL $wpdb, $WP_Statistics;
+
+	// If it's less than 10 hits, don't do anything.
+	if ( $purge_hits > 9 ) {
+		// Purge the visitor's with more than the defined hits.
+		$result = $wpdb->get_results(
+			$wpdb->prepare( "SELECT * FROM {$wpdb->prefix}statistics_visitor WHERE `hits` > %s", $purge_hits )
+		);
+
+		$to_delete = array();
+
+		// Loop through the results and store the requried information in an array.  We don't just process it now as deleting
+		// the rows from the visitor table will mess up the results from our first query.
+		foreach ( $result as $row ) {
+			$to_delete[] = array( $row->ID, $row->last_counter, $row->hits );
+		}
+		if ( count( $to_delete ) > 0 ) {
+			foreach ( $to_delete as $item ) {
+				// First update the daily hit count.
+				$wpdb->query(
+					$wpdb->prepare(
+						"UPDATE {$wpdb->prefix}statistics_visit SET `visit` = `visit` - %d WHERE `last_counter` = %s;",
+						$item[2],
+						$item[1]
+					)
+				);
+				// Next remove the visitor.  Note we can't do both in a single query, looks like $wpdb doesn't like executing them together.
+				$wpdb->query(
+					$wpdb->prepare( "DELETE FROM {$wpdb->prefix}statistics_visitor WHERE `id` = %s;", $item[0] )
+				);
+			}
+
+			$result_string = sprintf(
+				__( '%s records purged successfully.', 'wp-statistics' ),
+				'<code>' . count( $to_delete ) . '</code>'
+			);
+		} else {
+			$result_string = __( 'No visitors found to purge.', 'wp-statistics' );
+		}
+	} else {
+		$result_string = __( 'Number of hits must be greater than or equal to 10!', 'wp-statistics' );
+	}
+
+	if ( $WP_Statistics->get_option( 'prune_report' ) == true ) {
+		$blogname  = get_bloginfo( 'name' );
+		$blogemail = get_bloginfo( 'admin_email' );
+
+		$headers[] = "From: $blogname <$blogemail>";
+		$headers[] = "MIME-Version: 1.0";
+		$headers[] = "Content-type: text/html; charset=utf-8";
+
+		if ( $WP_Statistics->get_option( 'email_list' ) == '' ) {
+			$WP_Statistics->update_option( 'email_list', $blogemail );
+		}
+
+		wp_mail(
+			$WP_Statistics->get_option( 'email_list' ),
+			__( 'Database pruned on', 'wp-statistics' ) . ' ' . $blogname,
+			$result_string,
+			$headers
+		);
+	}
+
+	return $result_string;
+}