<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Process;

use Symfony\Component\Process\Exception\RuntimeException;

/**
 * Provides a way to continuously write to the input of a Process until the InputStream is closed.
 *
 * @author Nicolas Grekas <p@tchwork.com>
 *
 * @implements \IteratorAggregate<int, string>
 */
class InputStream implements \IteratorAggregate
{
    /** @var callable|null */
    private $onEmpty = null;
    private $input = [];
    private $open = true;

    /**
     * Sets a callback that is called when the write buffer becomes empty.
     */
    public function onEmpty(callable $onEmpty = null)
    {
        $this->onEmpty = $onEmpty;
    }

    /**
     * Appends an input to the write buffer.
     *
     * @param resource|string|int|float|bool|\Traversable|null $input The input to append as scalar,
     *                                                                stream resource or \Traversable
     */
    public function write(mixed $input)
    {
        if (null === $input) {
            return;
        }
        if ($this->isClosed()) {
            throw new RuntimeException(sprintf('"%s" is closed.', static::class));
        }
        $this->input[] = ProcessUtils::validateInput(__METHOD__, $input);
    }

    /**
     * Closes the write buffer.
     */
    public function close()
    {
        $this->open = false;
    }

    /**
     * Tells whether the write buffer is closed or not.
     */
    public function isClosed()
    {
        return !$this->open;
    }

    public function getIterator(): \Traversable
    {
        $this->open = true;

        while ($this->open || $this->input) {
            if (!$this->input) {
                yield '';
                continue;
            }
            $current = array_shift($this->input);

            if ($current instanceof \Iterator) {
                yield from $current;
            } else {
                yield $current;
            }
            if (!$this->input && $this->open && null !== $onEmpty = $this->onEmpty) {
                $this->write($onEmpty($this));
            }
        }
    }
}

• [D] Exception
• [D] Pipes
• [F] CHANGELOG.md
  Delete
• [F] composer.json
  Delete
• [F] ExecutableFinder.php
  Delete
• [F] InputStream.php
  Delete
• [F] LICENSE
  Delete
• [F] PhpExecutableFinder.php
  Delete
• [F] PhpProcess.php
  Delete
• [F] Process.php
  Delete
• [F] ProcessUtils.php
  Delete
• [F] README.md
  Delete

Contact Section

Get in Touch with Us for Any Questions or Support

We’d love to hear from you! Whether you have questions, feedback, or need support, our team is here to help. Reach out to us via email, phone, or visit our office. We’re committed to providing you with exceptional service and ensuring your experience with NFC Pay is seamless and satisfying. Let’s connect!

Name*

Email*

Message*

Send Message

Our Location

20-22 Wenlock Road, England, N1 7GU

Call us on: +03601 885399

Our office hours Monday–Friday, 9am - 9pm

Email us directly

support@example.com