50 lines
1.1 KiB
PHP
50 lines
1.1 KiB
PHP
<?php
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declare(strict_types=1);
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namespace GuzzleHttp\Psr7;
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use Psr\Http\Message\StreamInterface;
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/**
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* Lazily reads or writes to a file that is opened only after an IO operation
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* take place on the stream.
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*/
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final class LazyOpenStream implements StreamInterface
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{
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use StreamDecoratorTrait;
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/** @var string */
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private $filename;
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/** @var string */
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private $mode;
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/**
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* @var StreamInterface
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*/
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private $stream;
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/**
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* @param string $filename File to lazily open
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* @param string $mode fopen mode to use when opening the stream
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*/
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public function __construct(string $filename, string $mode)
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{
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$this->filename = $filename;
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$this->mode = $mode;
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// unsetting the property forces the first access to go through
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// __get().
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unset($this->stream);
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}
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/**
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* Creates the underlying stream lazily when required.
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*/
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protected function createStream(): StreamInterface
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{
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return Utils::streamFor(Utils::tryFopen($this->filename, $this->mode));
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}
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}
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