diff --git a/class/class-mainwp-backup.php b/class/class-mainwp-backup.php
index 90f93e2..e5d77af 100644
--- a/class/class-mainwp-backup.php
+++ b/class/class-mainwp-backup.php
@@ -2,6 +2,8 @@
 
 namespace MainWP\Child;
 
+// phpcs:disable WordPress.WP.AlternativeFunctions -- to custom functions.
+
 class MainWP_Backup {
 	protected static $instance = null;
 	protected $excludeZip;
@@ -138,11 +140,11 @@ class MainWP_Backup {
 	}
 
 	public function m_zip_file( $files, $archive ) {
-		$this->zip                 = new ZipArchive();
+		$this->zip                 = new \ZipArchive();
 		$this->zipArchiveFileCount = 0;
 		$this->zipArchiveSizeCount = 0;
 
-		$zipRes = $this->zip->open( $archive, ZipArchive::CREATE );
+		$zipRes = $this->zip->open( $archive, \ZipArchive::CREATE );
 		if ( $zipRes ) {
 			foreach ( $files as $file ) {
 				$this->add_fileToZip( $file, basename( $file ) );
@@ -161,7 +163,7 @@ class MainWP_Backup {
 	public function m_zip_file_pcl( $files, $archive ) {
 		// Zip this backup folder.
 		require_once ABSPATH . 'wp-admin/includes/class-pclzip.php';
-		$this->zip = new PclZip( $archive );
+		$this->zip = new \PclZip( $archive );
 
 		$error = false;
 		foreach ( $files as $file ) {
@@ -180,7 +182,7 @@ class MainWP_Backup {
 	 * @return bool
 	 */
 	public function check_zip_support() {
-		return class_exists( 'ZipArchive' );
+		return class_exists( '\ZipArchive' );
 	}
 
 	/**
@@ -201,11 +203,11 @@ class MainWP_Backup {
 	 */
 	public function create_zip_full_backup( $filepath, $excludes, $addConfig, $includeCoreFiles, $excludezip, $excludenonwp ) {
 		$this->excludeZip          = $excludezip;
-		$this->zip                 = new ZipArchive();
+		$this->zip                 = new \ZipArchive();
 		$this->zipArchiveFileCount = 0;
 		$this->zipArchiveSizeCount = 0;
 		$this->zipArchiveFileName  = $filepath;
-		$zipRes                    = $this->zip->open( $filepath, ZipArchive::CREATE );
+		$zipRes                    = $this->zip->open( $filepath, \ZipArchive::CREATE );
 		if ( $zipRes ) {
 			$nodes = glob( ABSPATH . '*' );
 			if ( ! $includeCoreFiles ) {
@@ -442,7 +444,7 @@ class MainWP_Backup {
 
 		// Zip this backup folder.
 		require_once ABSPATH . 'wp-admin/includes/class-pclzip.php';
-		$this->zip = new PclZip( $filepath );
+		$this->zip = new \PclZip( $filepath );
 		$this->zip->create( $backupFolder, PCLZIP_OPT_REMOVE_PATH, $backupFolder );
 		if ( $addConfig ) {
 			global $wpdb;
@@ -614,7 +616,7 @@ class MainWP_Backup {
 			if ( function_exists( 'gc_collect_cycles' ) ) {
 				gc_collect_cycles();
 			}
-			$this->zip = new ZipArchive();
+			$this->zip = new \ZipArchive();
 			$this->zip->open( $this->zipArchiveFileName );
 			$this->zipArchiveFileCount = 0;
 			$this->zipArchiveSizeCount = 0;
diff --git a/class/class-mainwp-child-back-up-buddy.php b/class/class-mainwp-child-back-up-buddy.php
index 1cd52af..a246317 100644
--- a/class/class-mainwp-child-back-up-buddy.php
+++ b/class/class-mainwp-child-back-up-buddy.php
@@ -12,7 +12,7 @@
  * Extension URL: https://mainwp.com/extension/mainwpbuddy/
  */
 
-// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- use external code.
+// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- root namespace to use external code.
 
 class MainWP_Child_Back_Up_Buddy {
 
diff --git a/class/class-mainwp-child-back-up-wordpress.php b/class/class-mainwp-child-back-up-wordpress.php
index 1397622..d45f0ee 100644
--- a/class/class-mainwp-child-back-up-wordpress.php
+++ b/class/class-mainwp-child-back-up-wordpress.php
@@ -13,7 +13,7 @@
  * Extension URL: https://mainwp.com/extension/backupwordpress/
  */
 
-// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- use external code.
+// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- root namespace to use external code.
 
 class MainWP_Child_Back_Up_WordPress {
 	public static $instance     = null;
diff --git a/class/class-mainwp-child-back-wp-up.php b/class/class-mainwp-child-back-wp-up.php
index 9bf9f08..1429952 100644
--- a/class/class-mainwp-child-back-wp-up.php
+++ b/class/class-mainwp-child-back-wp-up.php
@@ -13,7 +13,7 @@
  * Extension URL: https://mainwp.com/extension/backwpup/
  */
 
-// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- use external code.
+// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- root namespace to use external code.
 
 if ( ! defined( 'MAINWP_BACKWPUP_DEVELOPMENT' ) ) {
 	define( 'MAINWP_BACKWPUP_DEVELOPMENT', false );
diff --git a/class/class-mainwp-child-install.php b/class/class-mainwp-child-install.php
index 93f466a..df0c8f5 100644
--- a/class/class-mainwp-child-install.php
+++ b/class/class-mainwp-child-install.php
@@ -206,7 +206,7 @@ class MainWP_Child_Install {
 
 		$result = array();
 		foreach ( $urls as $url ) {
-			$installer  = new WP_Upgrader();
+			$installer  = new \WP_Upgrader();
 			$ssl_verify = true;
 			// @see wp-admin/includes/class-wp-upgrader.php
 			if ( isset( $_POST['sslVerify'] ) && '0' === $_POST['sslVerify'] ) {
diff --git a/class/class-mainwp-child-ithemes-security.php b/class/class-mainwp-child-ithemes-security.php
index 127575d..12426a3 100644
--- a/class/class-mainwp-child-ithemes-security.php
+++ b/class/class-mainwp-child-ithemes-security.php
@@ -13,7 +13,7 @@
  * Extension URL: https://mainwp.com/extension/ithemes-security/
  */
 
-// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- use external code.
+// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- root namespace to use external code.
 
 class MainWP_Child_IThemes_Security {
 	public static $instance     = null;
diff --git a/class/class-mainwp-child-links-checker.php b/class/class-mainwp-child-links-checker.php
index 20b12a3..07e5f4f 100644
--- a/class/class-mainwp-child-links-checker.php
+++ b/class/class-mainwp-child-links-checker.php
@@ -9,7 +9,7 @@
  * The code is used for the MainWP Broken Links Checker Extension (Retired Extension)
  */
 
-// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- use external code.
+// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- root namespace to use external code.
 
 class MainWP_Child_Links_Checker {
 
diff --git a/class/class-mainwp-child-pagespeed.php b/class/class-mainwp-child-pagespeed.php
index caa046d..0887c25 100644
--- a/class/class-mainwp-child-pagespeed.php
+++ b/class/class-mainwp-child-pagespeed.php
@@ -12,7 +12,7 @@
  * Extension URL: https://mainwp.com/extension/page-speed/
  */
 
-// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- use external code.
+// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- root namespace to use external code.
 
 class MainWP_Child_Pagespeed {
 
diff --git a/class/class-mainwp-child-server-information.php b/class/class-mainwp-child-server-information.php
index d362431..d01c246 100644
--- a/class/class-mainwp-child-server-information.php
+++ b/class/class-mainwp-child-server-information.php
@@ -1074,7 +1074,7 @@ class MainWP_Child_Server_Information {
 	}
 
 	protected static function get_zip_archive_enabled() {
-		return class_exists( 'ZipArchive' );
+		return class_exists( '\ZipArchive' );
 	}
 
 	protected static function get_gzip_enabled() {
diff --git a/class/class-mainwp-child-staging.php b/class/class-mainwp-child-staging.php
index f4ab1bd..e550ad4 100644
--- a/class/class-mainwp-child-staging.php
+++ b/class/class-mainwp-child-staging.php
@@ -12,6 +12,8 @@
  * Extension URL: https://mainwp.com/extension/staging/
  */
 
+// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- root namespace to use external code.
+
 class MainWP_Child_Staging {
 
 	public static $instance     = null;
diff --git a/class/class-mainwp-child-stats.php b/class/class-mainwp-child-stats.php
index 91398c9..c346c6b 100644
--- a/class/class-mainwp-child-stats.php
+++ b/class/class-mainwp-child-stats.php
@@ -166,9 +166,7 @@ class MainWP_Child_Stats {
 
 		$information['dbsize'] = MainWP_Child_DB::get_size();
 
-		global $mainWPChild;
-		$max_his = $mainWPChild->get_max_history();
-
+		$max_his = MainWP_Connect::instance()->get_max_history();
 		$auths                  = get_option( 'mainwp_child_auth' );
 		$information['extauth'] = ( $auths && isset( $auths[ $max_his ] ) ? $auths[ $max_his ] : null );
 
diff --git a/class/class-mainwp-child-timecapsule.php b/class/class-mainwp-child-timecapsule.php
index fca3487..39f8a10 100644
--- a/class/class-mainwp-child-timecapsule.php
+++ b/class/class-mainwp-child-timecapsule.php
@@ -11,7 +11,7 @@
  * Extension URL: https://mainwp.com/extension/time-capsule/
  */
 
-// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- use external code.
+// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- root namespace to use external code.
 
 class MainWP_Child_Timecapsule {
 	public static $instance     = null;
diff --git a/class/class-mainwp-child-updates.php b/class/class-mainwp-child-updates.php
index 4cc75e8..f006011 100644
--- a/class/class-mainwp-child-updates.php
+++ b/class/class-mainwp-child-updates.php
@@ -96,7 +96,7 @@ class MainWP_Child_Updates {
 				$slug = ( isset( $update['slug'] ) ? $update['slug'] : $update['Name'] );
 
 				if ( isset( $update['url'] ) ) {
-					$installer                        = new WP_Upgrader();
+					$installer                        = new \WP_Upgrader();
 					$result                           = $installer->run(
 						array(
 							'package'           => $update['url'],
diff --git a/class/class-mainwp-child-woocommerce-status.php b/class/class-mainwp-child-woocommerce-status.php
index 965347f..0e7278d 100644
--- a/class/class-mainwp-child-woocommerce-status.php
+++ b/class/class-mainwp-child-woocommerce-status.php
@@ -11,7 +11,7 @@
  * Extension URL: https://mainwp.com/extension/woocommerce-status/
  */
 
-// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- use external code.
+// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- root namespace to use external code.
 
 class MainWP_Child_WooCommerce_Status {
 	public static $instance = null;
diff --git a/class/class-mainwp-child-wordfence.php b/class/class-mainwp-child-wordfence.php
index 0e4ae91..dd51da3 100644
--- a/class/class-mainwp-child-wordfence.php
+++ b/class/class-mainwp-child-wordfence.php
@@ -11,7 +11,7 @@
  * Extension URL: https://mainwp.com/extension/wordfence/
  */
 
-// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- use external code.
+// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- root namespace to use external code.
 
 class MainWP_Child_Wordfence {
 	public static $instance        = null;
diff --git a/class/class-mainwp-child-wp-rocket.php b/class/class-mainwp-child-wp-rocket.php
index 3bd4099..2a144e5 100644
--- a/class/class-mainwp-child-wp-rocket.php
+++ b/class/class-mainwp-child-wp-rocket.php
@@ -12,7 +12,7 @@
  * Extension URL: https://mainwp.com/extension/rocket/
  */
 
-// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- use external code.
+// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- root namespace to use external code.
 
 class MainWP_Child_WP_Rocket {
 	public static $instance     = null;
diff --git a/class/class-mainwp-child-wpvivid-backuprestore.php b/class/class-mainwp-child-wpvivid-backuprestore.php
index 93b31f8..76fc3a7 100644
--- a/class/class-mainwp-child-wpvivid-backuprestore.php
+++ b/class/class-mainwp-child-wpvivid-backuprestore.php
@@ -1,6 +1,6 @@
 <?php
 
-// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- use external code.
+// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- root namespace to use external code.
 
 class MainWP_Child_WPvivid_BackupRestore {
 
diff --git a/class/class-mainwp-child.php b/class/class-mainwp-child.php
index de0afaa..56d062f 100644
--- a/class/class-mainwp-child.php
+++ b/class/class-mainwp-child.php
@@ -26,7 +26,7 @@ class MainWP_Child {
 
 	public $plugin_slug;
 	private $plugin_dir;
-	private $maxHistory = 5;
+	
 
 	public static $brandingTitle = null;
 
@@ -756,10 +756,6 @@ class MainWP_Child {
 		<?php
 	}
 
-	public function get_max_history() {
-		return $this->maxHistory;
-	}
-
 	public function parse_init() {
 
 		if ( isset( $_REQUEST['cloneFunc'] ) ) {
diff --git a/class/class-mainwp-clone-install.php b/class/class-mainwp-clone-install.php
index b749677..578bfbc 100644
--- a/class/class-mainwp-clone-install.php
+++ b/class/class-mainwp-clone-install.php
@@ -2,6 +2,8 @@
 
 namespace MainWP\Child;
 
+// phpcs:disable WordPress.WP.AlternativeFunctions -- to custom functions.
+
 class MainWP_Clone_Install {
 	protected $file;
 	public $config;
@@ -34,7 +36,7 @@ class MainWP_Clone_Install {
 	 * @return bool
 	 */
 	public function check_zip_support() {
-		return class_exists( 'ZipArchive' );
+		return class_exists( '\ZipArchive' );
 	}
 
 	/**
@@ -60,7 +62,7 @@ class MainWP_Clone_Install {
 		} elseif ( $this->check_zip_console() ) {
 			return false;
 		} elseif ( $this->check_zip_support() ) {
-			$zip    = new ZipArchive();
+			$zip    = new \ZipArchive();
 			$zipRes = $zip->open( $this->file );
 			if ( $zipRes ) {
 				$zip->deleteName( 'wp-config.php' );
@@ -72,7 +74,7 @@ class MainWP_Clone_Install {
 
 			return false;
 		} else {
-			$zip   = new PclZip( $this->file );
+			$zip   = new \PclZip( $this->file );
 			$list  = $zip->delete( PCLZIP_OPT_BY_NAME, 'wp-config.php' );
 			$list2 = $zip->delete( PCLZIP_OPT_BY_NAME, 'clone' );
 			if ( 0 === $list ) {
@@ -115,7 +117,7 @@ class MainWP_Clone_Install {
 		} elseif ( $this->check_zip_console() ) {
 			return false;
 		} elseif ( $this->check_zip_support() ) {
-			$zip    = new ZipArchive();
+			$zip    = new \ZipArchive();
 			$zipRes = $zip->open( $this->file );
 			if ( $zipRes ) {
 				$content = $zip->locateName( $file );
@@ -292,7 +294,7 @@ class MainWP_Clone_Install {
 			if ( $this->check_zip_console() ) {
 				return false;
 			} elseif ( $this->check_zip_support() ) {
-				$zip    = new ZipArchive();
+				$zip    = new \ZipArchive();
 				$zipRes = $zip->open( $this->file );
 				if ( $zipRes ) {
 					$content = $zip->get_from_name( 'clone/config.txt' );
@@ -303,7 +305,7 @@ class MainWP_Clone_Install {
 
 				return false;
 			} else {
-				$zip     = new PclZip( $this->file );
+				$zip     = new \PclZip( $this->file );
 				$content = $zip->extract( PCLZIP_OPT_BY_NAME, 'clone/config.txt', PCLZIP_OPT_EXTRACT_AS_STRING );
 				if ( ! is_array( $content ) || ! isset( $content[0]['content'] ) ) {
 					return false;
@@ -350,7 +352,7 @@ class MainWP_Clone_Install {
 	 * @return bool
 	 */
 	public function extract_zip_backup() {
-		$zip    = new ZipArchive();
+		$zip    = new \ZipArchive();
 		$zipRes = $zip->open( $this->file );
 		if ( $zipRes ) {
 			$zip->extract_to( ABSPATH );
@@ -379,7 +381,7 @@ class MainWP_Clone_Install {
 	}
 
 	public function extract_zip_pcl_backup() {
-		$zip = new PclZip( $this->file );
+		$zip = new \PclZip( $this->file );
 		if ( 0 === $zip->extract( PCLZIP_OPT_PATH, ABSPATH, PCLZIP_OPT_REPLACE_NEWER ) ) {
 			return false;
 		}
@@ -611,7 +613,7 @@ class MainWP_Clone_Install {
 		if ( ! isset( $_REQUEST['f'] ) || ( '' === $_REQUEST['f'] ) ) {
 			return;
 		}
-		if ( ! $this->is_valid_auth( $_REQUEST['key'] ) ) {
+		if ( ! MainWP_Connect::instance()->is_valid_auth( $_REQUEST['key'] ) ) {
 			return;
 		}
 
@@ -725,19 +727,4 @@ class MainWP_Clone_Install {
 			return true;
 	}
 
-
-	public function is_valid_auth( $key ) {
-		$auths = get_option( 'mainwp_child_auth' );
-		if ( ! $auths ) {
-			return false;
-		}
-		for ( $i = 0; $i <= $this->maxHistory; $i ++ ) {
-			if ( isset( $auths[ $i ] ) && ( $auths[ $i ] === $key ) ) {
-				return true;
-			}
-		}
-
-		return false;
-	}
-
 }
diff --git a/class/class-mainwp-connect.php b/class/class-mainwp-connect.php
index 90e26df..a82752a 100644
--- a/class/class-mainwp-connect.php
+++ b/class/class-mainwp-connect.php
@@ -4,7 +4,8 @@ namespace MainWP\Child;
 
 class MainWP_Connect {
 
-	public static $instance = null;
+	public static $instance = null;	
+	private $maxHistory = 5;
 
 	/**
 	 * Method get_class_name()
@@ -459,4 +460,24 @@ class MainWP_Connect {
 			MainWP_Helper::update_option( 'mainwp_child_auth', $auths, 'yes' );
 		}
 	}
+		
+	public function is_valid_auth( $key ) {
+		$auths = get_option( 'mainwp_child_auth' );
+		if ( ! $auths ) {
+			return false;
+		}
+		for ( $i = 0; $i <= $this->maxHistory; $i ++ ) {
+			if ( isset( $auths[ $i ] ) && ( $auths[ $i ] === $key ) ) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+	
+	
+	public function get_max_history() {
+		return $this->maxHistory;
+	}
+	
 }
diff --git a/class/class-mainwp-wordpress-seo.php b/class/class-mainwp-wordpress-seo.php
index 5629366..7778851 100644
--- a/class/class-mainwp-wordpress-seo.php
+++ b/class/class-mainwp-wordpress-seo.php
@@ -12,7 +12,7 @@
  * Extension URL: https://mainwp.com/extension/wordpress-seo/
  */
 
-// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- use external code.
+// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions -- root namespace to use external code.
 
 class MainWP_WordPress_SEO {
 	public static $instance = null;