Symfony 3.0安装

是symfony的新手，从上个月开始，我在终端上使用ubuntu上的以下命令不断安装新的symfony项目

# Linux, Mac OS X
$ symfony new my_project_name

它一直工作到今天，但不仅检查了新版本，但现在它开始给我跟随错误

Downloading Symfony...

    4.93 MB/4.93 MB ▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓  100%

 Preparing project...

PHP Warning:  require(/var/www/projectname/app/SymfonyRequirements.php): failed to open stream: No such file or directory in phar:///usr/local/bin/symfony/src/Symfony/Installer/DownloadCommand.php on line 265
PHP Stack trace:
PHP   1. {main}() /usr/local/bin/symfony:0
PHP   2. require() /usr/local/bin/symfony:10
PHP   3. Symfony\Component\Console\Application->run() phar:///usr/local/bin/symfony/symfony:35
PHP   4. Symfony\Component\Console\Application->doRun() phar:///usr/local/bin/symfony/vendor/symfony/console/Application.php:126
PHP   5. Symfony\Component\Console\Application->doRunCommand() phar:///usr/local/bin/symfony/vendor/symfony/console/Application.php:195
PHP   6. Symfony\Component\Console\Command\Command->run() phar:///usr/local/bin/symfony/vendor/symfony/console/Application.php:878
PHP   7. Symfony\Installer\NewCommand->execute() phar:///usr/local/bin/symfony/vendor/symfony/console/Command/Command.php:259
PHP   8. Symfony\Installer\DownloadCommand->checkSymfonyRequirements() phar:///usr/local/bin/symfony/src/Symfony/Installer/NewCommand.php:65
PHP Fatal error:  require(): Failed opening required '/var/www/projectname/app/SymfonyRequirements.php' (include_path='.:/usr/share/php:/usr/share/pear') in phar:///usr/local/bin/symfony/src/Symfony/Installer/DownloadCommand.php on line 265
PHP Stack trace:
PHP   1. {main}() /usr/local/bin/symfony:0
PHP   2. require() /usr/local/bin/symfony:10
PHP   3. Symfony\Component\Console\Application->run() phar:///usr/local/bin/symfony/symfony:35
PHP   4. Symfony\Component\Console\Application->doRun() phar:///usr/local/bin/symfony/vendor/symfony/console/Application.php:126
PHP   5. Symfony\Component\Console\Application->doRunCommand() phar:///usr/local/bin/symfony/vendor/symfony/console/Application.php:195
PHP   6. Symfony\Component\Console\Command\Command->run() phar:///usr/local/bin/symfony/vendor/symfony/console/Application.php:878
PHP   7. Symfony\Installer\NewCommand->execute() phar:///usr/local/bin/symfony/vendor/symfony/console/Command/Command.php:259
PHP   8. Symfony\Installer\DownloadCommand->checkSymfonyRequirements() phar:///usr/local/bin/symfony/src/Symfony/Installer/NewCommand.php:65

我甚至在位置usr / local / bin / symfony检查了symfony，它就在那里 .