Composer.phar 不想由 shell_exec 从 PHP 脚本运行.为什么?

Trying to execute it with all possible params, such as -d and full path etc.. No errors. When running another commands, all is ok, when running composer from CMD, all is ok too. Have tried exec, system, shell_exec etc.. What it could be?

echo system('php composer.phar install');

解决方案

Try outputting the error stream as well:

system('php composer.phar install 2>&1');

It might give you more of a hint as to what is going wrong.