HeaderProcessor.php
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HeaderProcessor.php
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	<?php

	namespace GuzzleHttp\Handler;

	use GuzzleHttp\Utils;

	/**
	* @internal
	*/
	final class HeaderProcessor
	{
	/**
	* Returns the HTTP version, status code, reason phrase, and headers.
	*
	* @param string[] $headers
	*
	* @return array{0:string, 1:int, 2:?string, 3:array}
	*
	* @throws \RuntimeException
	*/
	public static function parseHeaders(array $headers): array
	{
	if ($headers === []) {
	throw new \RuntimeException('Expected a non-empty array of header data');
	}

	$parts = \explode(' ', \array_shift($headers), 3);
	$version = \explode('/', $parts[0])[1] ?? null;

	if ($version === null) {
	throw new \RuntimeException('HTTP version missing from header data');
	}

	$status = $parts[1] ?? null;

	if ($status === null) {
	throw new \RuntimeException('HTTP status code missing from header data');
	}

	return [$version, (int) $status, $parts[2] ?? null, Utils::headersFromLines($headers)];
	}
	}