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Util
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FileHasher.php
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<?php declare (strict_types=1); namespace Rector\Util; use Rector\Exception\ShouldNotHappenException; /** * @see \Rector\Tests\Util\FileHasherTest */ final class FileHasher { /** * cryptographic insecure hasing of a string */ public function hash(string $string) : string { return \hash($this->getAlgo(), $string); } /** * cryptographic insecure hasing of files * * @param string[] $files */ public function hashFiles(array $files) : string { $configHash = ''; $algo = $this->getAlgo(); foreach ($files as $file) { $hash = \hash_file($algo, $file); if ($hash === \false) { throw new ShouldNotHappenException(\sprintf('File %s is not readable', $file)); } $configHash .= $hash; } return $configHash; } private function getAlgo() : string { //see https://php.watch/articles/php-hash-benchmark if (\PHP_VERSION_ID >= 80100) { // if xxh128 is available use it, as it is way faster return 'xxh128'; } return 'md4'; } }