PHPDaemon\Utils\ShmEntity::read PHP Method

    public function read($offset, $length = 1)
    {
        $ret = '';
        $segno = floor($offset / $this->segsize);
        $sOffset = $offset % $this->segsize;
        while (true) {
            if (!isset($this->segments[$segno])) {
                if (!$this->open($segno)) {
                    goto ret;
                }
            }
            $ret .= shmop_read($this->segments[$segno], $sOffset, min($length - mb_orig_strlen($ret), $this->segsize));
            if (mb_orig_strlen($ret) >= $length) {
                goto ret;
            }
            ++$segno;
            $sOffset = 0;
        }
        ret:
        return $ret === '' ? false : $ret;
    }