Service

<?php declare(strict_types=1); namespace GuzzleHttp\Psr7; use Psr\Http\Message\StreamInterface; /** * PHP stream implementation. */ class Stream implements StreamInterface { /** * @see https://www.php.net/manual/en/function.fopen.php * @see https://www.php.net/manual/en/function.gzopen.php */ private const READABLE_MODES = '/r|a\+|ab\+|w\+|wb\+|x\+|xb\+|c\+|cb\+/'; private const WRITABLE_MODES = '/a|w|r\+|rb\+|rw|x|c/'; /** @var resource */ private $stream; /** @var int|null */ private $size; /** @var bool */ private $seekable; /** @var bool */ private $readable; /** @var bool */ private $writable; /** @var string|null */ private $uri; /** @var mixed[] */ private $customMetadata; /** * This constructor accepts an associative array of options. * * - size: (int) If a read stream would otherwise have an indeterminate * size, but the size is known due to foreknowledge, then you can * provide that size, in bytes. * - metadata: (array) Any additional metadata to return when the metadata * of the stream is accessed. * * @param resource $stream Stream resource to wrap. * @param array{size?: int, metadata?: array} $options Associative array of options. * * @throws \InvalidArgumentException if the stream is not a stream resource */ public function __construct($stream, array $options = []) { if (!is_resource($stream)) { throw new \InvalidArgumentException('Stream must be a resource'); } if (isset($options['size'])) { $this->size = $options['size']; } $this->customMetadata = $options['metadata'] ?? []; $this->stream = $stream; $meta = stream_get_meta_data($this->stream); $this->seekable = $meta['seekable']; $this->readable = (bool) preg_match(self::READABLE_MODES, $meta['mode']); $this->writable = (bool) preg_match(self::WRITABLE_MODES, $meta['mode']); $this->uri = $this->getMetadata('uri'); } /** * Closes the stream when the destructed */ public function __destruct() { $this->close(); } public function __toString(): string { try { if ($this->isSeekable()) { $this->seek(0); } return $this->getContents(); } catch (\Throwable $e) { if (\PHP_VERSION_ID >= 70400) { throw $e; } trigger_error(sprintf('%s::__toString exception: %s', self::class, (string) $e), E_USER_ERROR); return ''; } } public function getContents(): string { if (!isset($this->stream)) { throw new \RuntimeException('Stream is detached'); } if (!$this->readable) { throw new \RuntimeException('Cannot read from non-readable stream'); } return Utils::tryGetContents($this->stream); } public function close(): void { if (isset($this->stream)) { if (is_resource($this->stream)) { fclose($this->stream); } $this->detach(); } } public function detach() { if (!isset($this->stream)) { return null; } $result = $this->stream; unset($this->stream); $this->size = $this->uri = null; $this->readable = $this->writable = $this->seekable = false; return $result; } public function getSize(): ?int { if ($this->size !== null) { return $this->size; } if (!isset($this->stream)) { return null; } // Clear the stat cache if the stream has a URI if ($this->uri) { clearstatcache(true, $this->uri); } $stats = fstat($this->stream); if (is_array($stats) && isset($stats['size'])) { $this->size = $stats['size']; return $this->size; } return null; } public function isReadable(): bool { return $this->readable; } public function isWritable(): bool { return $this->writable; } public function isSeekable(): bool { return $this->seekable; } public function eof(): bool { if (!isset($this->stream)) { throw new \RuntimeException('Stream is detached'); } return feof($this->stream); } public function tell(): int { if (!isset($this->stream)) { throw new \RuntimeException('Stream is detached'); } $result = ftell($this->stream); if ($result === false) { throw new \RuntimeException('Unable to determine stream position'); } return $result; } public function rewind(): void { $this->seek(0); } public function seek($offset, $whence = SEEK_SET): void { $whence = (int) $whence; if (!isset($this->stream)) { throw new \RuntimeException('Stream is detached'); } if (!$this->seekable) { throw new \RuntimeException('Stream is not seekable'); } if (fseek($this->stream, $offset, $whence) === -1) { throw new \RuntimeException('Unable to seek to stream position ' .$offset.' with whence '.var_export($whence, true)); } } public function read($length): string { if (!isset($this->stream)) { throw new \RuntimeException('Stream is detached'); } if (!$this->readable) { throw new \RuntimeException('Cannot read from non-readable stream'); } if ($length < 0) { throw new \RuntimeException('Length parameter cannot be negative'); } if (0 === $length) { return ''; } try { $string = fread($this->stream, $length); } catch (\Exception $e) { throw new \RuntimeException('Unable to read from stream', 0, $e); } if (false === $string) { throw new \RuntimeException('Unable to read from stream'); } return $string; } public function write($string): int { if (!isset($this->stream)) { throw new \RuntimeException('Stream is detached'); } if (!$this->writable) { throw new \RuntimeException('Cannot write to a non-writable stream'); } // We can't know the size after writing anything $this->size = null; $result = fwrite($this->stream, $string); if ($result === false) { throw new \RuntimeException('Unable to write to stream'); } return $result; } /** * @return mixed */ public function getMetadata($key = null) { if (!isset($this->stream)) { return $key ? null : []; } elseif (!$key) { return $this->customMetadata + stream_get_meta_data($this->stream); } elseif (isset($this->customMetadata[$key])) { return $this->customMetadata[$key]; } $meta = stream_get_meta_data($this->stream); return $meta[$key] ?? null; } }

Service Section

Our Services: Streamlining Your Payment Experience with Excellence

Discover how our services are designed to enhance your NFC Pay experience with convenience, security, and innovative solutions. From managing transactions to secure payments, we are dedicated to providing seamless support every step of the way.

Secure Card Storage

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Merchant Account Setup

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Real-Time Transaction Tracking

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Customer Support

Our dedicated support team is available to assist you with any queries or issues. Whether you need help with setting up your account or resolving transaction-related questions, we’re here to provide prompt and reliable assistance.