[php] How to enable PHP's openssl extension to install Composer?

After editting the "right" files (all php.ini's). i had still the issue. My solution was:

  1. Adding a System variable: OPENSSL_CONF

    the value of OPENSSL_CONF should be the openssl.cnf file of your current php version.

for me it was:

  • C:\wamp\bin\php\php5.6.12\extras\ssl\openssl.cnf

-> Restart WAMP -> should work now

Source: http://php.net/manual/en/openssl.installation.php