src/Driver/MysqliScriptCache.php
protected function get($key)
    {
        $value = null;
        $request = $this->connection->prepare('SELECT our_value FROM adback_cache_table WHERE our_key = ? LIMIT 1');
        $request->bind_param('s', $key);

        $request->execute();
        $request->bind_result($value);
        $request->fetch();
        $request->free_result();

        return $value;
    }
protected function get($key)
    {
        $value = null;
        $request = $this->connection->prepare('SELECT our_value FROM adback_cache_table WHERE our_key = ? LIMIT 1');
        $request->bind_param('s', $key);

        $request->execute();
        $request->bind_result($value);
        $request->fetch();
        $request->free_result();

        return $value;
    }
@param string $key

@return string|null