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<?php
/**
* ZSTD compressor using FFI and libzstd
* PoC, only for documentation purpose
*
* Copyright (c) 2019 Remi Collet
* License: CC-BY-SA
* http://creativecommons.org/licenses/by-sa/4.0/
*/
if (PHP_VERSION_ID < 70400 || !extension_loaded("ffi")) {
die("PHP 7.4 with FFI required\n");
}
printf("PHP version %s\n", PHP_VERSION);
if (PHP_SAPI == "cli" && !class_exists("\\Remi\\Zstd")) {
printf("Fallback on manual load\n");
require_once __DIR__ . '/preload-zstd.inc';
} else {
printf("Use preloaded class\n");
}
if (class_exists("\\Remi\\Zstd")) {
$t = microtime(true);
$ret = \Remi\Zstd::compress(PHP_BINARY, "testffi.zstd");
printf("\nSrc length = %d\n", $ret['in_len']);
printf("ZSTD_compressBound = %d\n", $ret['max_len']);
printf("ZSTD_compress = %d\n", $ret['out_len']);
$ret = \Remi\Zstd::decompress("testffi.zstd", "testffi.orig");
printf("Src length = %d\n", $ret['in_len']);
printf("ZSTD_decompressBound = %d\n", $ret['max_len']);
printf("ZSTD_decompress = %d\n", $ret['out_len']);
$t = microtime(true) - $t;
printf("Using FFI extension = %.3f\"\n\n", $t);
} else {
printf("FFI missing\n\n");
}
if (extension_loaded("zstd")) {
$t = microtime(true);
$src = file_get_contents(PHP_BINARY);
$len = strlen($src);
printf("Src length = %d\n", $len);
$comp = zstd_compress($src, 6);
$clen = strlen($comp);
printf("ZSTD_compress = %d\n", $clen);
$comp = substr($comp, 0, $clen);
file_put_contents("testzstd.zstd", $comp);
$comp = file_get_contents("testzstd.zstd");
$unco = zstd_uncompress($comp);
$ulen = strlen($unco);
printf("ZSTD_decompress = %d\n", $ulen);
file_put_contents("testzstd.orig", $unco);
var_dump($src === $unco);
$t = microtime(true) - $t;
printf("Using ZSTD extension = %.3f\"\n\n", $t);
} else {
printf("ZSTD missing\n\n");
}
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