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<?php declare(strict_types=1); namespace Psl\Filesystem; use Psl\Env; use Psl\SecureRandom; use Psl\Str; /** * Create a temporary file. * * @param non-empty-string|null $directory The directory where the temporary file will be created. * If none specified, `Env\temp_dir()` will be used to retrieve * the system default temporary directory. * @param non-empty-string|null $prefix The prefix of the generated temporary filename. * * @throws Exception\RuntimeException If unable to create the file. * @throws Exception\NotFoundException If $directory is not found. * @throws Exception\NotDirectoryException If $directory is not a directory. * @throws Exception\InvalidArgumentException If $prefix contains a directory separator. * * @return non-empty-string The absolute path to the temporary file. */ function create_temporary_file(?string $directory = null, ?string $prefix = null): string { $directory ??= Env\temp_dir(); if (!namespace\exists($directory)) { throw Exception\NotFoundException::forDirectory($directory); } if (!namespace\is_directory($directory)) { throw Exception\NotDirectoryException::for($directory); } $separator = namespace\SEPARATOR; if (null !== $prefix) { /** @psalm-suppress MissingThrowsDocblock - $offset is within bounds. */ if (Str\contains($prefix, $separator)) { throw new Exception\InvalidArgumentException(Str\format('$prefix should not contain a directory separator ( "%s" ).', $separator)); } } else { $prefix = ''; } try { /** @psalm-suppress MissingThrowsDocblock - alphabet is within range */ $filename = $directory . $separator . $prefix . SecureRandom\string(8); // @codeCoverageIgnoreStart } catch (SecureRandom\Exception\InsufficientEntropyException $e) { throw new Exception\RuntimeException('Unable to gather enough entropy to generate filename.', 0, $e); } // @codeCoverageIgnoreEnd create_file($filename); return $filename; }
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