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/**
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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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 * 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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 * take place on the stream.
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 */
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#[\AllowDynamicProperties]
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 */
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final class LazyOpenStream implements StreamInterface
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final class LazyOpenStream implements StreamInterface
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{
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{
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    use StreamDecoratorTrait;
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    use StreamDecoratorTrait;
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    /** @var string */
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    /** @var string */
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    private $mode;
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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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    /**
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     * @param string $filename File to lazily open
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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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     * @param string $mode     fopen mode to use when opening the stream
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     */
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     */
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    public function __construct(string $filename, string $mode)
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    public function __construct(string $filename, string $mode)
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    {
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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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        $this->filename = $filename;
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        // __get().
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        $this->mode = $mode;
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        unset($this->stream);
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    }
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    }
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