PHP不会在命令行上运行

下面是我input的确切命令，以及我按照说明操作时发生的情况。 我做了root 。 它工作正常。 抱歉!

也许下面的东西会帮助你。 如果不是的话，在我尝试任何过于复杂的事情之前，我经常会为了快速查看这样的问题而急于求成：

使用strace

strace /usr/local/bin/composer

你的命令和输出

 root@haze:~# curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer All settings correct for using Composer Downloading 1.2.0... Composer successfully installed to: /usr/local/bin/composer Use it: php /usr/local/bin/composer root@haze:~# /usr/local/bin/composer Do not run Composer as root/super user! See https://getcomposer.org/root for details ______ / ____/___ ____ ___ ____ ____ ________ _____ / / / __ \/ __ `__ \/ __ \/ __ \/ ___/ _ \/ ___/ / /___/ /_/ / / / / / / /_/ / /_/ (__ ) __/ / \____/\____/_/ /_/ /_/ .___/\____/____/\___/_/ /_/ Composer version 1.2.0 2016-07-19 01:28:52 Usage: command [options] [arguments] Options: -h, --help Display this help message -q, --quiet Do not output any message -V, --version Display this application version --ansi Force ANSI output --no-ansi Disable ANSI output -n, --no-interaction Do not ask any interactive question --profile Display timing and memory usage information --no-plugins Whether to disable plugins. -d, --working-dir=WORKING-DIR If specified, use the given directory as working directory. -v|vv|vvv, --verbose Increase the verbosity of messages: 1 for normal output, 2 for more verbose output and 3 for debug Available commands: about Short information about Composer archive Create an archive of this composer package browse Opens the package's repository URL or homepage in your browser. clear-cache Clears composer's internal package cache. clearcache Clears composer's internal package cache. config Set config options create-project Create new project from a package into given directory. depends Shows which packages cause the given package to be installed diagnose Diagnoses the system to identify common errors. dump-autoload Dumps the autoloader dumpautoload Dumps the autoloader exec Execute a vendored binary/script global Allows running commands in the global composer dir ($COMPOSER_HOME). help Displays help for a command home Opens the package's repository URL or homepage in your browser. info Show information about packages init Creates a basic composer.json file in current directory. install Installs the project dependencies from the composer.lock file if present, or falls back on the composer.json. licenses Show information about licenses of dependencies list Lists commands outdated Shows a list of installed packages that have updates available, including their latest version. prohibits Shows which packages prevent the given package from being installed remove Removes a package from the require or require-dev require Adds required packages to your composer.json and installs them run-script Run the scripts defined in composer.json. search Search for packages self-update Updates composer.phar to the latest version. selfupdate Updates composer.phar to the latest version. show Show information about packages status Show a list of locally modified packages suggests Show package suggestions update Updates your dependencies to the latest version according to composer.json, and updates the composer.lock file. validate Validates a composer.json and composer.lock why Shows which packages cause the given package to be installed why-not Shows which packages prevent the given package from being installed root@haze:~# 

OS = Ubuntu 16.04