I have an app run by laravel and experienced this error when i run composer install command from CLI.
Problem 1 - Installation request for react/zmq v0.3.0 -> satisfiable by react/zmq[v0.3.0]. - react/zmq v0.3.0 requires ext-zmq * -> the requested PHP extension zmq is missing from your system.
To enable extensions, verify that they are enabled in those .ini files: - C:\xampp\php\php.ini You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.
Here are some awesome ways to deal with that issue.
1. Download all dll here http://pecl.php.net/package/zmq to your matching OS.
Make sure you got the right one (x86 or x64) and that it is either thread safe or non- thread safe. How would you know? Time to play DLL roulette.
2. Copy libzmq.dll to your ~/xampp/php/
3. Copy php_zmq.dll to your php extension directory (eg. ~/xampp/php/ext/)
4. Then add this to your php.ini extension=php_zmq.dll