Klasa do weryfikacji czynnego płatnika VAT

SE/se-lib/VAT.php

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+<?php
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
+ *
+ *  Value Add Tax (VAT) library
+ *  Author: Mariusz Muszyński
+ *
+ *  Public static methods:
+ *
+ *    public bool VAT::validateNIP ( string $nip )
+ *      Tells whether the given string is a correct polish tax identification number (TIN/NIP)
+ *
+ *      Parameters:
+ *
+ *        nip
+ *          Polish tax identification number
+ *
+ *  Public dynamic methods:
+ *
+ *    public VAT::__construct ( void )
+ *      Creates a new VAT object.
+ *
+ *    public bool VAT::isActiveVatPayer ( string $nip )
+ *      Tells whether the given NIP belongs to an active VAT payer
+ *
+ *      Parameters:
+ *
+ *        nip
+ *          Polish tax identification number
+ *
+ *    public mixed VAT::getMessage ( [ bool $whole = false ] )
+ *      Returns last message after using VAT::isActiveVatPayer
+ *
+ *      Parameters:
+ *
+ *        whole
+ *          When TRUE, whole message is returned as an array
+ *          When FALSE, only main message is returned as a string
+ *
+ *  HINT:
+ *    It's faster to create one object and do many executes of VAT::isActiveVatPayer method
+ *    than creating separate objects for each VAT::isActiveVatPayer execute.
+ *
+ * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+ *
+ *  An example of usage:
+ *
+ *  $vat = new VAT();
+ *  $nip_array = ["5932268672", "6040018535"];
+ *  foreach ($nip_array as $nip)
+ *  {
+ *      echo $nip . " - ";
+ *      try
+ *      {
+ *          $result = $vat->isActiveVatPayer($nip);
+ *          if ($result) echo "is active VAT payer";
+ *          else echo "is not active VAT payer";
+ *          echo " (" . $vat->getMessage() . ")\n";
+ *      }
+ *      catch (Exception $e)
+ *      {
+ *          echo "An error occurred (" . $e->getMessage() . ")\n";
+ *      }
+ *  }
+ *
+\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+Class VAT {
+
+	private $ch, $dom, $headers;
+	private $cookies = "php://memory";
+	private $message = [""];
+	private $initialized = false;
+
+	private function getHeaders($ch, $header) {
+		$len = strlen($header);
+		$header = explode(':', $header, 2);
+		if (count($header) < 2) return $len;
+		$this->headers[trim($header[0])] = trim($header[1]);
+		return $len;
+	}
+
+	private function checkHeaders() {
+		if (!(isset($this->headers['Fast-Ver-Last']) && $this->headers['Fast-Ver-Last'])) throw new Exception("Błąd danych ze strony Ministerstwa Finansów");
+	}
+
+	public static function validateNIP($nip) {
+		$prefix = substr($nip, 0, 2);
+		if (!is_numeric($prefix)) $nip = substr($nip, 2);
+		else $prefix = null;
+		if ($prefix && $prefix != "PL") return false;
+		if (strlen($nip) != 10 || (!is_numeric($nip))) return false;
+		$control = (($nip[0] * 6 + $nip[1] * 5 + $nip[2] * 7 + $nip[3] * 2 + $nip[4] * 3 + $nip[5] * 4 + $nip[6] * 5 + $nip[7] * 6 + $nip[8] * 7) % 11 ) % 10;
+		return ($control == $nip[9]);
+	}
+
+	private static function paramsUrlEncode($params) {
+		$array = [];
+		foreach ($params as $param => $value) $array[] = $param . "=" . urlencode($value);
+		return implode("&", $array);
+	}
+
+	private function execute() {
+		$this->headers = [];
+		$result = curl_exec($this->ch);
+		if (curl_getinfo($this->ch)['http_code'] != 200) throw new Exception("Błąd połączenia ze stroną Ministerstwa Finansów");
+		return $result;
+	}
+
+	private function initialize() {
+		$this->ch = curl_init();
+		curl_setopt($this->ch, CURLOPT_URL, "http://www.finanse.mf.gov.pl/web/wp/pp/sprawdzanie-statusu-podmiotu-w-vat");
+		curl_setopt($this->ch, CURLOPT_RETURNTRANSFER, true);
+		curl_setopt($this->ch, CURLOPT_FOLLOWLOCATION, true);
+		curl_setopt($this->ch, CURLOPT_SSL_VERIFYHOST, false);
+		curl_setopt($this->ch, CURLOPT_SSL_VERIFYPEER, false);
+		curl_setopt($this->ch, CURLOPT_CONNECTTIMEOUT, 10);
+		curl_setopt($this->ch, CURLOPT_COOKIEJAR, $this->cookies);
+		curl_setopt($this->ch, CURLOPT_COOKIEFILE, $this->cookies);
+		curl_setopt($this->ch, CURLOPT_HEADERFUNCTION, "self::getHeaders");
+		$this->execute();
+		
+		$this->checkHeaders();
+		$params = [
+			"Load" => "1",
+			"FAST_VERLAST__" => $this->headers['Fast-Ver-Last'],
+		];
+		curl_setopt($this->ch, CURLOPT_URL, "https://ppuslugi.mf.gov.pl/_/?" . self::paramsUrlEncode($params));
+		$this->execute();
+
+		curl_setopt($this->ch, CURLOPT_URL, "https://ppuslugi.mf.gov.pl/_/EventOccurred");
+		$this->initialized = true;
+	}
+
+	private function reinitialize() {
+		$this->checkHeaders();
+		$params = [
+			"DOC_MODAL_ID__" => "0",
+			"EVENT__" => "b-9",
+			"FAST_VERLAST__" => $this->headers['Fast-Ver-Last'],
+		];
+		curl_setopt($this->ch, CURLOPT_POSTFIELDS, self::paramsUrlEncode($params));
+		$this->execute();
+	}
+
+	private function getResult($result) {
+		$search = ['/\<br(\s*)?\/?\>/i', '/[[:blank:]]{2,}/', '/[\x00-\x1F\x80-\xFF]/'];
+		$replace = ['|', ' ', ''];
+		$json = preg_replace($search, $replace, $result);
+		$array = json_decode($json, true);
+		if (!($array && isset($array['html']))) throw new Exception("Błąd danych ze strony Ministerstwa Finansów");
+		$html = $array['html'];
+		$this->dom->loadHTML(mb_convert_encoding($html, 'HTML-ENTITIES', 'UTF-8'));
+		$this->message = array_map("trim", array_values(array_diff(explode("|", $this->dom->getElementById("caption2_b-3")->textContent), [''])));
+		if (!$this->message) throw new Exception("Błąd danych ze strony Ministerstwa Finansów");
+		switch ($this->message[0]) {
+			case "Podmiot o podanym identyfikatorze podatkowym NIP jest zarejestrowany jako podatnik VAT czynny" : return true;
+			case "Podmiot o podanym identyfikatorze podatkowym NIP nie jest zarejestrowany jako podatnik VAT" : return false;
+			default: throw new Exception("Nieznany rezultat");
+		}
+	}
+
+	public function getMessage($whole = false) {
+		if ($whole) return $this->message;
+		else return $this->message[0];
+	}
+
+	public function isActiveVatPayer($nip) {
+		$nip = str_replace("-", "", trim($nip));
+		if (!$this->validateNIP($nip)) throw new Exception("Błędny NIP");
+
+		if (!$this->initialized) $this->initialize();
+		else $this->reinitialize();
+
+		$this->checkHeaders();
+		$params = [
+			"b-7" => $nip,
+			"DOC_MODAL_ID__" => "0",
+			"EVENT__" => "b-8",
+			"FAST_VERLAST__" => $this->headers['Fast-Ver-Last'],
+		];
+		curl_setopt($this->ch, CURLOPT_POSTFIELDS, self::paramsUrlEncode($params));
+		return $this->getResult($this->execute());
+	}
+
+	function __construct() {
+		$this->dom = new DOMDocument();
+	}
+
+	function __destruct() {
+		curl_close($this->ch);
+	}
+}