jms/序列化程序无法安装

Question

我正在使用 symfony 2.8，当我尝试使用 composer 安装 jms/serializer 包时，它显示此错误，

composer require jms/serializer-bundle

Problem 1
- jms/serializer-bundle 1.0.0 requires jms/serializer ^1.0.0 -> satisfiable by jms/serializer[1.0.0, 1.1.0, 1.2.0, 1.3.0, 1.3.1, 1.4.0, 1.4.1, 1.4.2, 1.5.0, 1.6.0, 1.6.1, 1.6.2, 1.7.0, 1.7.1, 1.8.0, 1.8.1, 1.9.0].
- jms/serializer-bundle 1.5.0 requires php >=5.4.0 -> your PHP version (7.1.1) overridden by "config.platform.php" version (5.3.9) does not satisfy that requirement.
- jms/serializer-bundle 1.4.0 requires php >=5.4.0 -> your PHP version (7.1.1) overridden by "config.platform.php" version (5.3.9) does not satisfy that requirement.
- jms/serializer-bundle 1.3.1 requires php >=5.4.0 -> your PHP version (7.1.1) overridden by "config.platform.php" version (5.3.9) does not satisfy that requirement.
- jms/serializer-bundle 1.3.0 requires php >=5.4.0 -> your PHP version (7.1.1) overridden by "config.platform.php" version (5.3.9) does not satisfy that requirement.
- jms/serializer-bundle 1.2.1 requires php >=5.4.0 -> your PHP version (7.1.1) overridden by "config.platform.php" version (5.3.9) does not satisfy that requirement.
- jms/serializer-bundle 1.2.0 requires php >=5.4.0 -> your PHP version (7.1.1) overridden by "config.platform.php" version (5.3.9) does not satisfy that requirement.
- jms/serializer-bundle 1.1.0 requires php >=5.4.0 -> your PHP version (7.1.1) overridden by "config.platform.php" version (5.3.9) does not satisfy that requirement.
- jms/serializer 1.9.0 requires php >=5.5.0 -> your PHP version (7.1.1) overridden by "config.platform.php" version (5.3.9) does not satisfy that requirement.
- jms/serializer 1.8.1 requires php >=5.5.0 -> your PHP version (7.1.1) overridden by "config.platform.php" version (5.3.9) does not satisfy that requirement.

我该如何解决？

Answer 1

在我的 composer.json 中，删除以下行：

"config": {
    "platform": {
        "php": "5.3.9"
    }
},

现在它开始工作了。