尝试设置UserVoice PHP SDK时，PHP扩展oauth丢失错误

我正在尝试使用Composer在本地计算机中设置UserVoice PHP SDK。我正在遵循在中指定的手册。我已经启用了oauth和mcrypt php扩展

composer.js文件包含以下内容：

{
  "require": {
    "uservoice/uservoice": ">=0.0.6"
  }
}

但当我尝试

php composer.phar install

命令时，终端中出现以下错误

Loading composer repositories with package information
Installing dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - uservoice/uservoice 0.0.9 requires ext-oauth * -> the requested PHP extension oauth is missing from your system.
    - uservoice/uservoice 0.0.8 requires ext-oauth * -> the requested PHP extension oauth is missing from your system.
    - uservoice/uservoice 0.0.7 requires ext-oauth * -> the requested PHP extension oauth is missing from your system.
    - uservoice/uservoice 0.0.6 requires ext-oauth * -> the requested PHP extension oauth is missing from your system.
    - Installation request for uservoice/uservoice >=0.0.6 -> satisfiable by uservoice/uservoice[0.0.6, 0.0.7, 0.0.8, 0.0.9].

php.ini文件配置了扩展名。我已经尝试在安装这些扩展后重新启动apache服务器，但问题仍然存在

---

我在这里遗漏了什么？

如果你在Ubuntu上，你可以使用。将此PPA添加到系统后，可以使用

aptitude install php5 oauth

安装oauth扩展包

添加PPA的说明取决于您所使用的Ubuntu版本。对于12.04，您需要安装

python软件属性

，然后可以使用

添加apt存储库

命令