Composer.phar don't want to run by shell_exec from PHP script. Why?

问题

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');

回答1:

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.

回答2:

Try this

$path = 'path where, composer.phar and composer.json exists';

var_dump(shell_exec("
  cd $path;
  export COMPOSER_HOME=$path./.config/composer;
  php $path/composer.phar show -i 2>&1"));

Tested on Linux.

来源：https://stackoverflow.com/questions/16626218/composer-phar-dont-want-to-run-by-shell-exec-from-php-script-why