diff --git a/lam/lib/tools.inc b/lam/lib/tools.inc
index 9e3f15e05..6da0be0e8 100644
--- a/lam/lib/tools.inc
+++ b/lam/lib/tools.inc
@@ -39,7 +39,7 @@ function getTools(): array {
 	$entry = $toolsDir->read();
 	// include all files in the tools directory
 	while ($entry) {
-		if ((substr($entry, strlen($entry) - 4, 4) == '.inc') && is_file($toolsDirName . '/' . $entry)) {
+		if ((substr($entry, strlen($entry) - 4, 4) === '.inc') && is_file($toolsDirName . '/' . $entry)) {
 			include_once($toolsDirName . '/' . $entry);
 		}
 		$entry = $toolsDir->read();
diff --git a/lam/lib/types.inc b/lam/lib/types.inc
index 39063eed7..355dd4389 100644
--- a/lam/lib/types.inc
+++ b/lam/lib/types.inc
@@ -256,21 +256,21 @@ class ConfiguredType {
 			$units = ldap_get_entries($connection, $sr);
 			cleanLDAPResult($units);
 			// extract Dns
-			$count = sizeof($units);
+			$count = count($units);
 			for ($i = 0; $i < $count; $i++) {
-				if (in_array('container', $units[$i]['objectclass'])) {
-					// Active Directory fix, hide system containers
-					if (preg_match('/.*cn=system,dc=.+/i', $units[$i]['dn']) || preg_match('/.*CN=program data,dc=.+/i', $units[$i]['dn'])) {
-						continue;
-					}
+				// Active Directory fix, hide system containers
+				if (in_array('container', $units[$i]['objectclass'])
+					&& (preg_match('/.*cn=system,dc=.+/i', $units[$i]['dn'])
+						|| preg_match('/.*CN=program data,dc=.+/i', $units[$i]['dn']))) {
+					continue;
 				}
 				$ret[] = $units[$i]['dn'];
 			}
 		}
 		// add root suffix if needed
 		$found = false;
-		for ($i = 0; $i < sizeof($ret); $i++) { // search suffix case-insensitive
-			if (strtolower($this->getSuffix()) == strtolower($ret[$i])) {
+		for ($i = 0; $i < count($ret); $i++) { // search suffix case-insensitive
+			if (strtolower($this->getSuffix()) === strtolower($ret[$i])) {
 				$found = true;
 				break;
 			}
diff --git a/rector.php b/rector.php
index d701f1146..a67773e37 100644
--- a/rector.php
+++ b/rector.php
@@ -2,6 +2,7 @@
 
 use Rector\CodeQuality\Rector\Empty_\SimplifyEmptyCheckOnEmptyArrayRector;
 use Rector\CodeQuality\Rector\For_\ForRepeatedCountToOwnVariableRector;
+use Rector\CodeQuality\Rector\Identical\FlipTypeControlToUseExclusiveTypeRector;
 use Rector\Config\RectorConfig;
 use Rector\Php70\Rector\StaticCall\StaticCallOnNonStaticToInstanceCallRector;
 use Rector\Php73\Rector\FuncCall\StringifyStrNeedlesRector;
@@ -36,7 +37,8 @@ return RectorConfig::configure()
 		RestoreDefaultNullToNullableTypePropertyRector::class,
 		ForRepeatedCountToOwnVariableRector::class,
 		SimplifyEmptyCheckOnEmptyArrayRector::class,
-		DisallowedEmptyRuleFixerRector::class
+		DisallowedEmptyRuleFixerRector::class,
+		FlipTypeControlToUseExclusiveTypeRector::class
 	])
 	->withFileExtensions([
 		'php',