I rebuilt PHP last night to include APC and all of a sudden composer stopped working in my project. Whenever I ran a simple update, install or dump-autoload I’d get:
$ composer update PHP Fatal error: include(): Cannot redeclare class symfony\component\process\process in phar:///usr/local/bin/composer/vendor/composer/ClassLoader.php on line 183 Fatal error: include(): Cannot redeclare class symfony\component\process\process in phar:///usr/local/bin/composer/vendor/composer/ClassLoader.php on line 183
A quick google told me others also had the same issue.
It seems that there’s a bug between composer.phar and APC. From one of the composer issues:
Quite weird, but then again the php docs seem to acknowledge that APC should not really be enabled on the CLI. It seems to be a phar+apc bug, see https://bugs.php.net/bug.php?id=59398 https://bugs.php.net/bug.php?id=59829 https://bugs.php.net/bug.php?id=59907 as well.
There are a couple of things you can do to fix this, but they all involve turning off APC for php-cli. First, run composer diag to see whether any more information can be gleaned:
$ composer diag Checking platform settings: FAIL The apc.enable_cli setting is incorrect. Add the following to the end of your `php.ini`: apc.enable_cli = Off The php.ini used by your command-line PHP is: /opt/php-5.4.15/lib/php.ini If you can not modify the ini file, you can also run `php -d option=value` to modify ini values on the fly. You can use -d multiple times.
If you get that message, you know you have the same problem as I did :) You can also check the troubleshooting page on getcomposer.org
You can try running the self-update (for me I don’t reference the .phar file because I use the unix install convention).
php /usr/local/bin/composer self-update
Those are really just everyday things to try if you have composer issues, to really fix this you need to disable APC for php-cli. You should set this option to 0 in your php.ini
If you don’t have access to php.ini, you can disable APC on the CLI per command:
php -d apc.enable_cli=0 /usr/local/bin/composer install
Note: if you have composer.phar in your project you could just do:
php -d apc.enable_cli=0 composer.phar install