Composer Warning: openssl extension is missing. How to enable in WAMP
WAMP uses different php.ini files in the CLI and for Apache. when you enable php_openssl through the WAMP UI, you enable it for Apache, not for the CLI.
You need to modify C:\wamp\bin\php\php-5.4.3\php.ini to enable it for the CLI.
Install Composer fails with The openssl extension is missing error
I suspect "php.ini-production" is a dummy configuration file suitable for live environments. Do a php -i at the console and find the 'php.ini' path, to see where it is expecting the ini file to be kept. This is normally expecting "php.ini", and may not actually exist - if it does not, copy php.ini-development (or similar) to the location required.
This is near the top of (a very long) output, so you may find redirecting it to a file helpful (php -i > C:\phpinfo.txt).
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