Stream::openZvalStream( string $body )

229    private static function openZvalStream(string $body)230    {231        static $wrapper;232        $wrapper ?? \stream_wrapper_register('Nyholm-Psr7-Zval', $wrapper = \get_class(new class233        {234            public $context;235            private $data;236            private $position = 0;237            public function stream_open(): bool238            {239                $this->data = \stream_context_get_options($this->context)['Nyholm-Psr7-Zval']['data'];240                \stream_context_set_option($this->context, 'Nyholm-Psr7-Zval', 'data', null);241                return \true;242            }243            public function stream_read(int $count): string244            {245                $result = \substr($this->data, $this->position, $count);246                $this->position += \strlen($result);247                return $result;248            }249            public function stream_write(string $data): int250            {251                $this->data = \substr_replace($this->data, $data, $this->position, \strlen($data));252                $this->position += \strlen($data);253                return \strlen($data);254            }255            public function stream_tell(): int256            {257                return $this->position;258            }259            public function stream_eof(): bool260            {261                return \strlen($this->data) <= $this->position;262            }263            public function stream_stat(): array264            {265                return [266                    'mode' => 33206,267                    // POSIX_S_IFREG | 0666268                    'nlink' => 1,269                    'rdev' => -1,270                    'size' => \strlen($this->data),271                    'blksize' => -1,272                    'blocks' => -1,273                ];274            }275            public function stream_seek(int $offset, int $whence): bool276            {277                if (\SEEK_SET === $whence && (0 <= $offset && \strlen($this->data) >= $offset)) {278                    $this->position = $offset;279                } elseif (\SEEK_CUR === $whence && 0 <= $offset) {280                    $this->position += $offset;281                } elseif (\SEEK_END === $whence && (0 > $offset && 0 <= $offset = \strlen($this->data) + $offset)) {282                    $this->position = $offset;283                } else {284                    return \false;285                }286                return \true;287            }288            public function stream_set_option(): bool289            {290                return \true;291            }292            public function stream_truncate(int $new_size): bool293            {294                if ($new_size) {295                    $this->data = \substr($this->data, 0, $new_size);296                    $this->position = \min($this->position, $new_size);297                } else {298                    $this->data = '';299                    $this->position = 0;300                }301                return \true;302            }303        }));304        $context = \stream_context_create(['Nyholm-Psr7-Zval' => ['data' => $body]]);305        if (!$stream = @\fopen('Nyholm-Psr7-Zval://', 'r+', \false, $context)) {306            \stream_wrapper_register('Nyholm-Psr7-Zval', $wrapper);307            $stream = \fopen('Nyholm-Psr7-Zval://', 'r+', \false, $context);308        }