diff --git a/lib/imap.php b/lib/imap.php
index 046ba94..c162400 100644
--- a/lib/imap.php
+++ b/lib/imap.php
@@ -65,12 +65,12 @@ class OC_User_IMAP extends \OCA\user_external\Base {
 		if(count($users) === 1) {
 			$username = $uid;
 			$uid = $users[0];
- 		// Check if we only want logins from ONE domain and strip the domain part from UID		
-		}elseif($this->domain != '') {
+ 		// Check if we only want logins from ONE domain and strip the domain part from UID
+	}elseif($this->domain !== '') {
  			$pieces = explode('@', $uid);
- 			if(count($pieces) == 1) {
+ 			if(count($pieces) === 1) {
  				$username = $uid . "@" . $this->domain;
- 			}elseif((count($pieces) == 2) and ($pieces[1] == $this->domain)) {
+ 			}elseif((count($pieces) === 2) and ($pieces[1] === $this->domain)) {
  				$username = $uid;
  				$uid = $pieces[0];
  			}else{
@@ -79,7 +79,7 @@ class OC_User_IMAP extends \OCA\user_external\Base {
  		}else{
  			$username = $uid;
  		}
- 
+
  		$mbox = @imap_open($this->mailbox, $username, $password, OP_HALFOPEN, 1);
 		imap_errors();
 		imap_alerts();
diff --git a/lib/smb.php b/lib/smb.php
index f2595a1..7d16d18 100644
--- a/lib/smb.php
+++ b/lib/smb.php
@@ -53,7 +53,7 @@ class OC_User_SMB extends \OCA\user_external\Base{
 		} else if (strpos($lastline, 'NT_STATUS_BAD_NETWORK_NAME') !== false) {
 			//login on minor error
 			goto login;
-		} else if ($retval != 0) {
+		} else if ($retval !== 0) {
 			//some other error
 			OCP\Util::writeLog(
 				'user_external', 'ERROR: smbclient error: ' . trim($lastline),
@@ -91,4 +91,3 @@ class OC_User_SMB extends \OCA\user_external\Base{
 		return false;
 	}
 }
-
diff --git a/lib/webdavauth.php b/lib/webdavauth.php
index 65ea7b7..a77adfe 100644
--- a/lib/webdavauth.php
+++ b/lib/webdavauth.php
@@ -34,7 +34,7 @@ class WebDavAuth extends Base {
 		list($protocol, $path) = $arr;
 		$url= $protocol.'://'.urlencode($uid).':'.urlencode($password).'@'.$path;
 		$headers = get_headers($url);
-		if($headers==false) {
+		if($headers === false) {
 			\OCP\Util::writeLog('OC_USER_WEBDAVAUTH', 'Not possible to connect to WebDAV Url: "'.$protocol.'://'.$path.'" ', 3);
 			return false;