# depicter/trunk/modules/GuzzleHttp/Psr7/LazyOpenStream.php

Depicter — Popup & Slider Builder, version trunk. 50 lines.

- Page: https://pluginprobe.com/plugins/depicter/trunk/code/modules/GuzzleHttp/Psr7/LazyOpenStream.php
- Raw: https://pluginprobe.com/plugins/depicter/trunk/raw/modules/GuzzleHttp/Psr7/LazyOpenStream.php
- Modified: 2024-03-02T11:03:48+00:00

Line numbers below start at 1. Link to a line or a range by appending a fragment to the
page URL, for example `https://pluginprobe.com/plugins/depicter/trunk/code/modules/GuzzleHttp/Psr7/LazyOpenStream.php#L10-L20`.

```php
<?php

declare(strict_types=1);

namespace Depicter\GuzzleHttp\Psr7;

use Depicter\Psr\Http\Message\StreamInterface;

/**
 * Lazily reads or writes to a file that is opened only after an IO operation
 * take place on the stream.
 */
final class LazyOpenStream implements StreamInterface
{
    use StreamDecoratorTrait;

    /** @var string */
    private $filename;

    /** @var string */
    private $mode;

    /**
     * @var StreamInterface
     */
    private $stream;

    /**
     * @param string $filename File to lazily open
     * @param string $mode     fopen mode to use when opening the stream
     */
    public function __construct(string $filename, string $mode)
    {
        $this->filename = $filename;
        $this->mode = $mode;

        // unsetting the property forces the first access to go through
        // __get().
        unset($this->stream);
    }

    /**
     * Creates the underlying stream lazily when required.
     */
    protected function createStream(): StreamInterface
    {
        return Utils::streamFor(Utils::tryFopen($this->filename, $this->mode));
    }
}

```