<?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;
    }
}

• [D] Exception
• [F] AppendStream.php
  Delete
• [F] BufferStream.php
  Delete
• [F] CachingStream.php
  Delete
• [F] DroppingStream.php
  Delete
• [F] FnStream.php
  Delete
• [F] Header.php
  Delete
• [F] HttpFactory.php
  Delete
• [F] InflateStream.php
  Delete
• [F] LazyOpenStream.php
  Delete
• [F] LimitStream.php
  Delete
• [F] Message.php
  Delete
• [F] MessageTrait.php
  Delete
• [F] MimeType.php
  Delete
• [F] MultipartStream.php
  Delete
• [F] NoSeekStream.php
  Delete
• [F] PumpStream.php
  Delete
• [F] Query.php
  Delete
• [F] Request.php
  Delete
• [F] Response.php
  Delete
• [F] Rfc7230.php
  Delete
• [F] ServerRequest.php
  Delete
• [F] Stream.php
  Delete
• [F] StreamDecoratorTrait.php
  Delete
• [F] StreamWrapper.php
  Delete
• [F] UploadedFile.php
  Delete
• [F] Uri.php
  Delete
• [F] UriComparator.php
  Delete
• [F] UriNormalizer.php
  Delete
• [F] UriResolver.php
  Delete
• [F] Utils.php
  Delete

How To Payment

Simple Steps to Complete Your Payment Securely and Efficiently

Making a payment on our website is quick and secure. Start by logging in or creating an account. Select your preferred payment method, input the required details, and review the information. Once you confirm everything is correct, click on the "Submit Payment" button. You’ll receive instant confirmation and can track your payment status through your account dashboard. It’s an easy and secure process.

• Go to the Payment Section: Access the payment area on our website or app.
• Choose Your Payment Method: Select your preferred payment option.
• Enter Payment Details: Provide the necessary payment information.
• Verify Your Information: Check that all details are correct.
• Confirm Your Payment: Click "Submit Payment" to complete the transaction.