ALIOSS::is_object_exist PHP Method

    public function is_object_exist($bucket, $object, $options = null)
    {
        //options
        $this->validate_options($options);
        if (!$options) {
            $options = array();
        }
        //bucket
        $this->is_empty($bucket, OSS_BUCKET_IS_NOT_ALLOWED_EMPTY);
        //object
        $this->is_empty($object, OSS_OBJECT_IS_NOT_ALLOWED_EMPTY);
        $options[self::OSS_BUCKET] = $bucket;
        $options[self::OSS_METHOD] = 'GET';
        $options[self::OSS_OBJECT] = $object;
        $response = $this->get_object_meta($bucket, $object, $options);
        return $response;
    }