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33 lines
1006 B
Markdown
33 lines
1006 B
Markdown
---
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title: Compression Streams
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permalink: /compression-streams
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---
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This package implements compression and decompression streams based on Zlib. `ZlibOutputStream` can be used for compression, while `ZlibInputStream` can be used for decompression. Both can simply wrap an existing stream to apply them. Both accept an `$encoding` and `$options` parameter in their constructor.
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## Examples
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```php
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$inputStream = new ResourceInputStream(STDIN);
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$gzInputStream = new ZlibInputStream($inputStream, \ZLIB_ENCODING_GZIP);
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while (null !== $chunk = yield $gzInputStream) {
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print $chunk;
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}
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```
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```php
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$outputStream = new ResourceOutputStream(STDOUT);
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$gzOutputStream = new ZlibOutputStream($outputStream, \ZLIB_ENCODING_GZIP);
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for ($i = 0; $i < 100; $i++) {
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yield $gzOutputStream->write(bin2hex(random_bytes(32));
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}
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yield $gzOutputStream->end();
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```
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## See also
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* [`./examples/gzip-compress.php`](../examples/gzip-compress.php)
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* [`./examples/gzip-decompress.php`](../examples/gzip-decompress.php)
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