<?php
declare(strict_types=1);
namespace GuzzleHttp\Psr7;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Message\StreamInterface;
use Psr\Http\Message\UriInterface;
final class Utils
{
/**
* Remove the items given by the keys, case insensitively from the data.
*
* @param (string|int)[] $keys
*/
public static function caselessRemove(array $keys, array $data): array
{
$result = [];
foreach ($keys as &$key) {
$key = strtolower((string) $key);
}
foreach ($data as $k => $v) {
if (!in_array(strtolower((string) $k), $keys)) {
$result[$k] = $v;
}
}
return $result;
}
/**
* Copy the contents of a stream into another stream until the given number
* of bytes have been read.
*
* @param StreamInterface $source Stream to read from
* @param StreamInterface $dest Stream to write to
* @param int $maxLen Maximum number of bytes to read. Pass -1
* to read the entire stream.
*
* @throws \RuntimeException on error.
*/
public static function copyToStream(StreamInterface $source, StreamInterface $dest, int $maxLen = -1): void
{
$bufferSize = 8192;
if ($maxLen === -1) {
while (!$source->eof()) {
if (!$dest->write($source->read($bufferSize))) {
break;
}
}
} else {
$remaining = $maxLen;
while ($remaining > 0 && !$source->eof()) {
$buf = $source->read(min($bufferSize, $remaining));
$len = strlen($buf);
if (!$len) {
break;
}
$remaining -= $len;
$dest->write($buf);
}
}
}
/**
* Copy the contents of a stream into a string until the given number of
* bytes have been read.
*
* @param StreamInterface $stream Stream to read
* @param int $maxLen Maximum number of bytes to read. Pass -1
* to read the entire stream.
*
* @throws \RuntimeException on error.
*/
public static function copyToString(StreamInterface $stream, int $maxLen = -1): string
{
$buffer = '';
if ($maxLen === -1) {
while (!$stream->eof()) {
$buf = $stream->read(1048576);
if ($buf === '') {
break;
}
$buffer .= $buf;
}
return $buffer;
}
$len = 0;
while (!$stream->eof() && $len < $maxLen) {
$buf = $stream->read($maxLen - $len);
if ($buf === '') {
break;
}
$buffer .= $buf;
$len = strlen($buffer);
}
return $buffer;
}
/**
* Calculate a hash of a stream.
*
* This method reads the entire stream to calculate a rolling hash, based
* on PHP's `hash_init` functions.
*
* @param StreamInterface $stream Stream to calculate the hash for
* @param string $algo Hash algorithm (e.g. md5, crc32, etc)
* @param bool $rawOutput Whether or not to use raw output
*
* @throws \RuntimeException on error.
*/
public static function hash(StreamInterface $stream, string $algo, bool $rawOutput = false): string
{
$pos = $stream->tell();
if ($pos > 0) {
$stream->rewind();
}
$ctx = hash_init($algo);
while (!$stream->eof()) {
hash_update($ctx, $stream->read(1048576));
}
$out = hash_final($ctx, $rawOutput);
$stream->seek($pos);
return $out;
}
/**
* Clone and modify a request with the given changes.
*
* This method is useful for reducing the number of clones needed to mutate
* a message.
*
* The changes can be one of:
* - method: (string) Changes the HTTP method.
* - set_headers: (array) Sets the given headers.
* - remove_headers: (array) Remove the given headers.
* - body: (mixed) Sets the given body.
* - uri: (UriInterface) Set the URI.
* - query: (string) Set the query string value of the URI.
* - version: (string) Set the protocol version.
*
* @param RequestInterface $request Request to clone and modify.
* @param array $changes Changes to apply.
*/
public static function modifyRequest(RequestInterface $request, array $changes): RequestInterface
{
if (!$changes) {
return $request;
}
$headers = $request->getHeaders();
if (!isset($changes['uri'])) {
$uri = $request->getUri();
} else {
// Remove the host header if one is on the URI
if ($host = $changes['uri']->getHost()) {
$changes['set_headers']['Host'] = $host;
if ($port = $changes['uri']->getPort()) {
$standardPorts = ['http' => 80, 'https' => 443];
$scheme = $changes['uri']->getScheme();
if (isset($standardPorts[$scheme]) && $port != $standardPorts[$scheme]) {
$changes['set_headers']['Host'] .= ':'.$port;
}
}
}
$uri = $changes['uri'];
}
if (!empty($changes['remove_headers'])) {
$headers = self::caselessRemove($changes['remove_headers'], $headers);
}
if (!empty($changes['set_headers'])) {
$headers = self::caselessRemove(array_keys($changes['set_headers']), $headers);
$headers = $changes['set_headers'] + $headers;
}
if (isset($changes['query'])) {
$uri = $uri->withQuery($changes['query']);
}
if ($request instanceof ServerRequestInterface) {
$new = (new ServerRequest(
$changes['method'] ?? $request->getMethod(),
$uri,
$headers,
$changes['body'] ?? $request->getBody(),
$changes['version'] ?? $request->getProtocolVersion(),
$request->getServerParams()
))
->withParsedBody($request->getParsedBody())
->withQueryParams($request->getQueryParams())
->withCookieParams($request->getCookieParams())
->withUploadedFiles($request->getUploadedFiles());
foreach ($request->getAttributes() as $key => $value) {
$new = $new->withAttribute($key, $value);
}
return $new;
}
return new Request(
$changes['method'] ?? $request->getMethod(),
$uri,
$headers,
$changes['body'] ?? $request->getBody(),
$changes['version'] ?? $request->getProtocolVersion()
);
}
/**
* Read a line from the stream up to the maximum allowed buffer length.
*
* @param StreamInterface $stream Stream to read from
* @param int|null $maxLength Maximum buffer length
*/
public static function readLine(StreamInterface $stream, int $maxLength = null): string
{
$buffer = '';
$size = 0;
while (!$stream->eof()) {
if ('' === ($byte = $stream->read(1))) {
return $buffer;
}
$buffer .= $byte;
// Break when a new line is found or the max length - 1 is reached
if ($byte === "\n" || ++$size === $maxLength - 1) {
break;
}
}
return $buffer;
}
/**
* Create a new stream based on the input type.
*
* Options is an associative array that can contain the following keys:
* - metadata: Array of custom metadata.
* - size: Size of the stream.
*
* This method accepts the following `$resource` types:
* - `Psr\Http\Message\StreamInterface`: Returns the value as-is.
* - `string`: Creates a stream object that uses the given string as the contents.
* - `resource`: Creates a stream object that wraps the given PHP stream resource.
* - `Iterator`: If the provided value implements `Iterator`, then a read-only
* stream object will be created that wraps the given iterable. Each time the
* stream is read from, data from the iterator will fill a buffer and will be
* continuously called until the buffer is equal to the requested read size.
* Subsequent read calls will first read from the buffer and then call `next`
* on the underlying iterator until it is exhausted.
* - `object` with `__toString()`: If the object has the `__toString()` method,
* the object will be cast to a string and then a stream will be returned that
* uses the string value.
* - `NULL`: When `null` is passed, an empty stream object is returned.
* - `callable` When a callable is passed, a read-only stream object will be
* created that invokes the given callable. The callable is invoked with the
* number of suggested bytes to read. The callable can return any number of
* bytes, but MUST return `false` when there is no more data to return. The
* stream object that wraps the callable will invoke the callable until the
* number of requested bytes are available. Any additional bytes will be
* buffered and used in subsequent reads.
*
* @param resource|string|int|float|bool|StreamInterface|callable|\Iterator|null $resource Entity body data
* @param array{size?: int, metadata?: array} $options Additional options
*
* @throws \InvalidArgumentException if the $resource arg is not valid.
*/
public static function streamFor($resource = '', array $options = []): StreamInterface
{
if (is_scalar($resource)) {
$stream = self::tryFopen('php://temp', 'r+');
if ($resource !== '') {
fwrite($stream, (string) $resource);
fseek($stream, 0);
}
return new Stream($stream, $options);
}
switch (gettype($resource)) {
case 'resource':
/*
* The 'php://input' is a special stream with quirks and inconsistencies.
* We avoid using that stream by reading it into php://temp
*/
/** @var resource $resource */
if ((\stream_get_meta_data($resource)['uri'] ?? '') === 'php://input') {
$stream = self::tryFopen('php://temp', 'w+');
stream_copy_to_stream($resource, $stream);
fseek($stream, 0);
$resource = $stream;
}
return new Stream($resource, $options);
case 'object':
/** @var object $resource */
if ($resource instanceof StreamInterface) {
return $resource;
} elseif ($resource instanceof \Iterator) {
return new PumpStream(function () use ($resource) {
if (!$resource->valid()) {
return false;
}
$result = $resource->current();
$resource->next();
return $result;
}, $options);
} elseif (method_exists($resource, '__toString')) {
return self::streamFor((string) $resource, $options);
}
break;
case 'NULL':
return new Stream(self::tryFopen('php://temp', 'r+'), $options);
}
if (is_callable($resource)) {
return new PumpStream($resource, $options);
}
throw new \InvalidArgumentException('Invalid resource type: '.gettype($resource));
}
/**
* Safely opens a PHP stream resource using a filename.
*
* When fopen fails, PHP normally raises a warning. This function adds an
* error handler that checks for errors and throws an exception instead.
*
* @param string $filename File to open
* @param string $mode Mode used to open the file
*
* @return resource
*
* @throws \RuntimeException if the file cannot be opened
*/
public static function tryFopen(string $filename, string $mode)
{
$ex = null;
set_error_handler(static function (int $errno, string $errstr) use ($filename, $mode, &$ex): bool {
$ex = new \RuntimeException(sprintf(
'Unable to open "%s" using mode "%s": %s',
$filename,
$mode,
$errstr
));
return true;
});
try {
/** @var resource $handle */
$handle = fopen($filename, $mode);
} catch (\Throwable $e) {
$ex = new \RuntimeException(sprintf(
'Unable to open "%s" using mode "%s": %s',
$filename,
$mode,
$e->getMessage()
), 0, $e);
}
restore_error_handler();
if ($ex) {
/** @var $ex \RuntimeException */
throw $ex;
}
return $handle;
}
/**
* Safely gets the contents of a given stream.
*
* When stream_get_contents fails, PHP normally raises a warning. This
* function adds an error handler that checks for errors and throws an
* exception instead.
*
* @param resource $stream
*
* @throws \RuntimeException if the stream cannot be read
*/
public static function tryGetContents($stream): string
{
$ex = null;
set_error_handler(static function (int $errno, string $errstr) use (&$ex): bool {
$ex = new \RuntimeException(sprintf(
'Unable to read stream contents: %s',
$errstr
));
return true;
});
try {
/** @var string|false $contents */
$contents = stream_get_contents($stream);
if ($contents === false) {
$ex = new \RuntimeException('Unable to read stream contents');
}
} catch (\Throwable $e) {
$ex = new \RuntimeException(sprintf(
'Unable to read stream contents: %s',
$e->getMessage()
), 0, $e);
}
restore_error_handler();
if ($ex) {
/** @var $ex \RuntimeException */
throw $ex;
}
return $contents;
}
/**
* Returns a UriInterface for the given value.
*
* This function accepts a string or UriInterface and returns a
* UriInterface for the given value. If the value is already a
* UriInterface, it is returned as-is.
*
* @param string|UriInterface $uri
*
* @throws \InvalidArgumentException
*/
public static function uriFor($uri): UriInterface
{
if ($uri instanceof UriInterface) {
return $uri;
}
if (is_string($uri)) {
return new Uri($uri);
}
throw new \InvalidArgumentException('URI must be a string or UriInterface');
}
}
With NFC Pay, experience seamless and secure transactions right at your fingertips. Add your cards, load your wallet, and make payments effortlessly. Activate your merchant account to receive payments or transfer money instantly to other users. NFC Pay combines security, speed, and smart features, making every transaction smooth and reliable. Embrace the future of payments with NFC Pay.
2320
Total User
2320
Happy User
Our Best Customer
How it Works
Quick Steps to NFC Pay
Getting started with NFC Pay is simple and quick. Register your account, add your cards, and you're ready to make payments in no time. Whether you're paying at a store, sending money to a friend, or managing your merchant transactions, NFC Pay makes it easy and secure.
1
Register Your Account
Download the NFC Pay app and sign up with your email or phone number. Complete the registration process by verifying your identity, and set up your secure PIN to protect your account.
2
Add Your Cards
Link your debit or credit cards to your NFC Pay wallet. Simply scan your card or enter the details manually, and you’re set to load funds, shop, and pay with ease.
3
Make Payment
To pay, simply tap your phone or scan the QR code at checkout. You can also transfer money to other users with a few taps. Enjoy fast, contactless payments with top-notch security.
Security System
Advanced Security Features Designed to Protect Your Information Effectively
NFC Pay prioritizes your security with advanced features that safeguard every transaction. From SMS or email verification to end-to-end encryption, we've implemented robust measures to ensure your data is always protected. Our security systems are designed to prevent unauthorized access and provide you with a safe and reliable payment experience.
SMS or Email Verification
Receive instant alerts for every transaction to keep track of your account activities.
KYC Solution
Verify your identity through our Know Your Customer process to prevent fraud and enhance security.
Two Factor Authentication
Dramatically supply transparent backward deliverables before caward comp internal or "organic" sources.
End-to-End Encryption
All your data and transactions are encrypted, ensuring that your sensitive information remains private.
Behavior Tracking
Monitor unusual activity patterns to detect and prevent suspicious behavior in real-time.
Why Choice Us
Top Reasons to Choose Us for Reliable and Expert Solutions
With NFC Pay, you get a trusted platform backed by proven expertise and a commitment to quality. We put our customers first, offering innovative solutions tailored to your needs, ensuring every transaction is secure, swift, and seamless.
1
Proven Expertise
Our team brings years of experience in the digital payments industry to provide reliable services.
2
Commitment to Quality
We prioritize excellence, ensuring that every aspect of our platform meets the highest standards.
3
Customer-Centric Approach
Your needs drive our solutions, and we are dedicated to delivering a superior user experience.
4
Innovative Solutions
We continuously evolve, integrating the latest technologies to enhance your payment experience.
Testimonial Section
Customer Feedback: Real Experiences from Satisfied Clients and Partners
Hear from our users who trust NFC Pay for their everyday transactions. Our commitment to security, ease of use, and exceptional service shines through in their experiences. See why our clients choose NFC Pay for their payment needs and how it has transformed the way they manage their finances.
"NFC Pay has made my transactions incredibly simple and secure. The intuitive interface and quick payment options are game-changers for my business"
"I love how NFC Pay prioritizes security without compromising on convenience. The two-factor authentication and instant alerts give me peace of mind every time I use it."
"Setting up my merchant account was a breeze, and now I can accept payments effortlessly. NFC Pay has truly streamlined my operations, saving me time and hassle."
Get the NFC Pay App for Seamless Transactions Anytime, Anywhere
Unlock the full potential of NFC Pay by downloading our app, designed to bring secure, swift, and smart transactions to your fingertips. Whether you're paying at a store, transferring money to friends, or managing your business payments, the NFC Pay app makes it effortless. Available on both iOS and Android, it's your all-in-one solution for convenient and reliable digital payments. Download now and experience the future of payments!
In the digital age, privacy concerns have become increasingly paramount, prompting the European Union to enact the General Data Protection Regulation (GDPR) in 2018. Among its many provisions, GDPR sets strict guidelines for the collection and processing of personal data, including the use of cookies on websites. Privacy Policy
