diff --git a/src/Fingerprint.php b/src/Fingerprint.php
index eca54f0..d9a5c21 100644
--- a/src/Fingerprint.php
+++ b/src/Fingerprint.php
@@ -6,79 +6,79 @@
  */
 class Fingerprint
 {
-	private static $conn;
-	private static $ip;
-	private static $port;
-	private static $comkey;
-	private static $isConnected = false;
-	private static $NL = "\r\n";
-
-	private static $payload = [
-		'GetAttLog' => '<GetAttLog><ArgComKey xsi:type=\"xsd:integer\">#COMKEY</ArgComKey>#PIN</GetAttLog>',
-		'GetUserInfo' => '<GetUserInfo><ArgComKey xsi:type=\"xsd:integer\">#COMKEY</ArgComKey>#PIN</GetUserInfo>'
-	];
-
-	public function connect($ip, $port=80, $comkey=0)
-	{
-		static::$ip = $ip;
-		static::$port = $port;
-		static::$comkey = $comkey;
-
-		static::$conn = @fsockopen(static::$ip, static::$port, $errno, $errstr, 1);
-
-		if (static::$conn) {
-			static::$isConnected = true;
-		}else{
-			static::$isConnected = false;
-		}
-		
-		return (new static);
-	}
-
-	public function getStatus()
-	{
-		return static::$isConnected ? 'connected' : 'disconnected';
-	}
-
-	public function getUserInfo($pin='all')
-	{
-		$payload = self::$payload['GetUserInfo'];
-
-		static::connect(static::$ip, static::$port, static::$comkey);
-
-		if (is_array($pin)) {
-			$pinPayload = "";
-			foreach ($pin as $value) {
-				$pinPayload .= "<Arg><PIN>".$value."</PIN></Arg>";
-			}
-			$pin = $pinPayload;
-		}else {
-			$pin = "<Arg><PIN>".$pin."</PIN></Arg>";
-		}
-
-		$payload = str_replace("#PIN", $pin, $payload);
-
-		$this->generateRequest($payload);
+    private static $conn;
+    private static $ip;
+    private static $port;
+    private static $comkey;
+    private static $isConnected = false;
+    private static $NL = "\r\n";
+
+    private static $payload = [
+        'GetAttLog' => '<GetAttLog><ArgComKey xsi:type=\"xsd:integer\">#COMKEY</ArgComKey>#PIN</GetAttLog>',
+        'GetUserInfo' => '<GetUserInfo><ArgComKey xsi:type=\"xsd:integer\">#COMKEY</ArgComKey>#PIN</GetUserInfo>'
+    ];
+
+    public function connect($ip, $port=80, $comkey=0)
+    {
+        static::$ip = $ip;
+        static::$port = $port;
+        static::$comkey = $comkey;
+
+        static::$conn = @fsockopen(static::$ip, static::$port, $errno, $errstr, 1);
+
+        if (static::$conn) {
+            static::$isConnected = true;
+        }else{
+            static::$isConnected = false;
+        }
+        
+        return (new static);
+    }
+
+    public function getStatus()
+    {
+        return static::$isConnected ? 'connected' : 'disconnected';
+    }
+
+    public function getUserInfo($pin='all')
+    {
+        $payload = self::$payload['GetUserInfo'];
+
+        static::connect(static::$ip, static::$port, static::$comkey);
+
+        if (is_array($pin)) {
+            $pinPayload = "";
+            foreach ($pin as $value) {
+                $pinPayload .= "<Arg><PIN>".$value."</PIN></Arg>";
+            }
+            $pin = $pinPayload;
+        }else {
+            $pin = "<Arg><PIN>".$pin."</PIN></Arg>";
+        }
+
+        $payload = str_replace("#PIN", $pin, $payload);
+
+        $this->generateRequest($payload);
 
         $buffer = "";
-	    $isStartNow = false;
-	    while ($res = fgets(static::$conn, 1024)) {
-	        if (strpos($res, "<GetUserInfoResponse>") !== false) {
-	            $isStartNow = true;
-	        }
-	        if($isStartNow) {
-	            $buffer = $buffer.$res;
-	        }
-	    }
+        $isStartNow = false;
+        while ($res = fgets(static::$conn, 1024)) {
+            if (strpos($res, "<GetUserInfoResponse>") !== false) {
+                $isStartNow = true;
+            }
+            if($isStartNow) {
+                $buffer = $buffer.$res;
+            }
+        }
 
-	    $gaRes = ["<GetUserInfoResponse>", "</GetUserInfoResponse>", "\r\n"];
-	    $buffer = str_replace($gaRes, "", $buffer);
+        $gaRes = ["<GetUserInfoResponse>", "</GetUserInfoResponse>", "\r\n"];
+        $buffer = str_replace($gaRes, "", $buffer);
 
-	    fclose(static::$conn);
-	    return static::parseUserInfoData($buffer);
-	}
+        fclose(static::$conn);
+        return static::parseUserInfoData($buffer);
+    }
 
-	private static function parseUserInfoData($data="") {
+    private static function parseUserInfoData($data="") {
 
         $dataRow = explode("<Row>", $data);
         array_shift($dataRow);
@@ -110,49 +110,49 @@ private static function parseUserInfoData($data="") {
         return $userData;
     }
 
-	public function getAttendance($pin='all', $date_start=null, $date_end=null)
-	{
-		if ($date_start != null && $date_end == null) {
-			$date_end = $date_start;
-		}
+    public function getAttendance($pin='all', $date_start=null, $date_end=null)
+    {
+        if ($date_start != null && $date_end == null) {
+            $date_end = $date_start;
+        }
 
-		$payload = self::$payload['GetAttLog'];
+        $payload = self::$payload['GetAttLog'];
 
-		static::connect(static::$ip, static::$port, static::$comkey);
+        static::connect(static::$ip, static::$port, static::$comkey);
 
-		if (is_array($pin)) {
-			$pinPayload = "";
-			foreach ($pin as $value) {
-				$pinPayload .= "<Arg><PIN>".$value."</PIN></Arg>";
-			}
-			$pin = $pinPayload;
-		}else {
-			$pin = "<Arg><PIN>".$pin."</PIN></Arg>";
-		}
+        if (is_array($pin)) {
+            $pinPayload = "";
+            foreach ($pin as $value) {
+                $pinPayload .= "<Arg><PIN>".$value."</PIN></Arg>";
+            }
+            $pin = $pinPayload;
+        }else {
+            $pin = "<Arg><PIN>".$pin."</PIN></Arg>";
+        }
 
-		$payload = str_replace("#PIN", $pin, $payload);
+        $payload = str_replace("#PIN", $pin, $payload);
 
-		$this->generateRequest($payload);
+        $this->generateRequest($payload);
 
         $buffer = "";
-	    $isStartNow = false;
-	    while ($res = fgets(static::$conn, 1024)) {
-	        if (strpos($res, "<GetAttLogResponse>") !== false) {
-	            $isStartNow = true;
-	        }
-	        if($isStartNow) {
-	            $buffer = $buffer.$res;
-	        }
-	    }
-
-	    $gaRes = ["<GetAttLogResponse>", "</GetAttLogResponse>", "\r\n"];
-	    $buffer = str_replace($gaRes, "", $buffer);
-
-	    fclose(static::$conn);
-	    return static::parseAttendanceData($buffer, $date_start, $date_end);
-	}
-
-	private static function parseAttendanceData($data="", $date_start=null, $date_end=null) {
+        $isStartNow = false;
+        while ($res = fgets(static::$conn, 1024)) {
+            if (strpos($res, "<GetAttLogResponse>") !== false) {
+                $isStartNow = true;
+            }
+            if($isStartNow) {
+                $buffer = $buffer.$res;
+            }
+        }
+
+        $gaRes = ["<GetAttLogResponse>", "</GetAttLogResponse>", "\r\n"];
+        $buffer = str_replace($gaRes, "", $buffer);
+
+        fclose(static::$conn);
+        return static::parseAttendanceData($buffer, $date_start, $date_end);
+    }
+
+    private static function parseAttendanceData($data="", $date_start=null, $date_end=null) {
         $dataRow = explode("<Row>", $data);
         array_shift($dataRow);
 
@@ -168,29 +168,29 @@ private static function parseAttendanceData($data="", $date_start=null, $date_en
             $workcode = static::getValueFromTag($endRow, "<WorkCode>", "</WorkCode>");
 
             if ($date_start != null &&  $date_end != null) {
-            	
-            	$rangeDate = static::dateRange($date_start, $date_end);
+                
+                $rangeDate = static::dateRange($date_start, $date_end);
 
-            	$dateCheck = explode(' ', $datetime)[0];
+                $dateCheck = explode(' ', $datetime)[0];
 
-            	if (in_array($dateCheck, $rangeDate)) {
-		            $fingerData[] = [
-		                'pin' => $fid,
-		                'datetime' => $datetime,
-		                'verified' => $verified,
-		                'status' => $status,
-		                'workcode' => $workcode,
-		            ];
-            	}
+                if (in_array($dateCheck, $rangeDate)) {
+                    $fingerData[] = [
+                        'pin' => $fid,
+                        'datetime' => $datetime,
+                        'verified' => $verified,
+                        'status' => $status,
+                        'workcode' => $workcode,
+                    ];
+                }
 
             } else {
-            	$fingerData[] = [
-	                'pin' => $fid,
-	                'datetime' => $datetime,
-	                'verified' => $verified,
-	                'status' => $status,
-	                'workcode' => $workcode,
-	            ];
+                $fingerData[] = [
+                    'pin' => $fid,
+                    'datetime' => $datetime,
+                    'verified' => $verified,
+                    'status' => $status,
+                    'workcode' => $workcode,
+                ];
             }
         }
 
@@ -213,7 +213,7 @@ private static function getValueFromTag($a, $b, $c)
 
     private static function dateRange($startDate, $endDate)
     {
-    	$dateRange = [];
+        $dateRange = [];
         $period = new \DatePeriod(
             new \DateTime($startDate),
             new \DateInterval('P1D'),
@@ -224,21 +224,21 @@ private static function dateRange($startDate, $endDate)
             array_push($dateRange, $value->format('Y-m-d'));
         }
 
-		array_push($dateRange, date('Y-m-d', strtotime($endDate)));
+        array_push($dateRange, date('Y-m-d', strtotime($endDate)));
 
         return $dateRange;
     }
 
-	private function generateRequest($payload)
-	{
-		$payload = str_replace("#COMKEY", static::$comkey, $payload);
-		fputs(static::$conn, "POST /iWsService HTTP/1.0".self::$NL);
+    private function generateRequest($payload)
+    {
+        $payload = str_replace("#COMKEY", static::$comkey, $payload);
+        fputs(static::$conn, "POST /iWsService HTTP/1.0".self::$NL);
         fputs(static::$conn, "Content-Type: text/xml".self::$NL);
         fputs(static::$conn, "Content-Length: ".strlen($payload).self::$NL.self::$NL);
         fputs(static::$conn, $payload.self::$NL);
-	}
+    }
 
-	public function __call($method, $parameters)
+    public function __call($method, $parameters)
     {
         return $this->$method(...$parameters);
     }