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Filename : StreamFactoryInterface.php
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<?php

namespace Psr\Http\Message;

interface StreamFactoryInterface
{
    /**
     * Create a new stream from a string.
     *
     * The stream SHOULD be created with a temporary resource.
     *
     * @param string $content String content with which to populate the stream.
     *
     * @return StreamInterface
     */
    public function createStream(string $content = ''): StreamInterface;

    /**
     * Create a stream from an existing file.
     *
     * The file MUST be opened using the given mode, which may be any mode
     * supported by the `fopen` function.
     *
     * The `$filename` MAY be any string supported by `fopen()`.
     *
     * @param string $filename Filename or stream URI to use as basis of stream.
     * @param string $mode Mode with which to open the underlying filename/stream.
     *
     * @return StreamInterface
     * @throws \RuntimeException If the file cannot be opened.
     * @throws \InvalidArgumentException If the mode is invalid.
     */
    public function createStreamFromFile(string $filename, string $mode = 'r'): StreamInterface;

    /**
     * Create a new stream from an existing resource.
     *
     * The stream MUST be readable and may be writable.
     *
     * @param resource $resource PHP resource to use as basis of stream.
     *
     * @return StreamInterface
     */
    public function createStreamFromResource($resource): StreamInterface;
}