Laravel 5.3没有安装

Question

我感觉在安装laravel5.3框架的困难，问题是，当我用composer create-project --prefer-dist laravel/laravel blog作曲家安装最新版本，它会自动当我在composer.json文件更改laravel 5.2到laravel 5.3安装laravel 5.2，而不是`laravel 5.3

并运行composer update提示错误是这样的。

Your requirements could not be resolved to an installable set of packages. 

    Problem 1 
    - laravel/framework v5.3.9 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.8 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.7 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.6 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.5 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.4 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.3 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.28 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.27 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.26 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.25 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.24 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.23 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.22 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.21 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.20 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.2 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.19 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.18 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.17 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.16 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.15 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.14 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.13 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.12 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.11 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.10 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.1 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - laravel/framework v5.3.0 requires php >=5.6.4 -> your PHP version (5.6.3) does not satisfy that requirement. 
    - Installation request for laravel/framework 5.3.* -> satisfiable by laravel/framework[v5.3.0, v5.3.1, v5.3.10, v5.3.11, v5.3.12, v5.3.13, v5.3.14, v5.3.15, v5.3.16, v5.3.17, v5.3.18, v5.3.19, v5.3.2, v5.3.20, v5.3.21, v5.3.22, v5.3.23, v5.3.24, v5.3.25, v5.3.26, v5.3.27, v5.3.28, v5.3.3, v5.3.4, v5.3.5, v5.3.6, v5.3.7, v5.3.8, v5.3.9]. 

但我有新安装的XAMPP这说明我的PHP version是7.0.13（本回声 '当前PHP版本：' 检查。phpversion（）;） 发生了什么事？为什么我无法安装Laravel 5.3？

Answer 1

我认为这是最好安装一个新的Laravel 5.3，而不是升级。这是更多的工作，但避免许多问题。

运行composer create-project --prefer-dist laravel/laravel blog前，用laravel 5.3 require configuration

UPDATE
您可以尝试composer create-project --prefer-dist laravel/laravel=5.3.* blog特定laravel版本，然后运行composer update比较您的系统配置。

Answer 2

，首先你应该更新你的PHP版本（使用7.0），因为laravel 5.3通常与php7.0工作， 那么之后你应该composer.json从5.2更改laravel版本5.3，然后运行作曲家更新!!!!!! 一切都会好起来。