vendor/zendframework/zend-diactoros/src/functions/marshal_protocol_version_from_sapi.php

   1 <?php
   2 /**
   3  * @see       https://github.com/zendframework/zend-diactoros for the canonical source repository
   4  * @copyright Copyright (c) 2018 Zend Technologies USA Inc. (https://www.zend.com)
   5  * @license   https://github.com/zendframework/zend-diactoros/blob/master/LICENSE.md New BSD License
   6  */
   7
   8 namespace Zend\Diactoros;
   9
  10 use UnexpectedValueException;
  11
  12 use function preg_match;
  13
  14 /**
  15  * Return HTTP protocol version (X.Y) as discovered within a `$_SERVER` array.
  16  *
  17  * @param array $server
  18  * @return string
  19  * @throws UnexpectedValueException if the $server['SERVER_PROTOCOL'] value is
  20  *     malformed.
  21  */
  22 function marshalProtocolVersionFromSapi(array $server)
  23 {
  24     if (! isset($server['SERVER_PROTOCOL'])) {
  25         return '1.1';
  26     }
  27
  28     if (! preg_match('#^(HTTP/)?(?P<version>[1-9]\d*(?:\.\d)?)$#', $server['SERVER_PROTOCOL'], $matches)) {
  29         throw new UnexpectedValueException(sprintf(
  30             'Unrecognized protocol version (%s)',
  31             $server['SERVER_PROTOCOL']
  32         ));
  33     }
  34
  35     return $matches['version'];
  36 }