我正在尝试使用以下命令安装composer：
sudo curl -s https://getcomposer.org/installer | PHP
而我收到此错误：
All settings correct for using Composer Downloading... Download Failed: Failed to open stream: Permission denied Downloading... Download Failed: Failed to open stream: Permission denied Downloading... Download Failed: Failed to open stream: Permission denied The download Failed repeatedly,aborting.
我不知道为什么？你有好主意吗？我试着谷歌但没什么.
