尝试创建 sylius 项目时从作曲家获取安装请求错误

Question

当我尝试执行时：

composer create-project -s dev sylius/sylius:dev-master

我收到以下错误：

Installing sylius/sylius (dev-master 0da3c0022d3118135e56908dfa4c69e6699770ce)
  - Installing sylius/sylius (dev-master master)
    Cloning master
Created project in sylius
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Your requirements could not be resolved to an installable set of packages.
  Problem 1
    - Installation request for fabpot/goutte v1.0.3 -> satisfiable by fabpot/goutte[v1.0.3].
    - fabpot/goutte v1.0.3 requires ext-curl * -> the requested PHP extension curl is missing from your system.
  Problem 2
    - Installation request for instaclick/php-webdriver 1.0.17 -> satisfiable by instaclick/php-webdriver[1.0.17].
    - instaclick/php-webdriver 1.0.17 requires ext-curl * -> the requested PHP extension curl is missing from your system.
  Problem 3
    - fabpot/goutte v1.0.3 requires ext-curl * -> the requested PHP extension curl is missing from your system.
    - behat/mink-goutte-driver v1.0.9 requires fabpot/goutte ~1.0.1 -> satisfiable by fabpot/goutte[v1.0.3].
    - Installation request for behat/mink-goutte-driver v1.0.9 -> satisfiable by behat/mink-goutte-driver[v1.0.9].

Answer 1

当您缺少 PHP curl 扩展时，会发生此错误。某些 sylius 依赖项依赖于该扩展。

要解决此错误，只需安装并启用 php-curl 扩展。

使用 apt-get：

sudo apt-get install php5-curl

或关注：

http://php.net/manual/en/curl.installation.php

Answer 2

将minimum-stability选项添加到 composer.json 文件。

{
    "require": {
        "php-ews/php-ews": "dev-master"
    },
    "minimum-stability": "dev"
}