Some settings on your machine make Composer unable to work properly. Make sure that you fix the issues listed below and run this script again: The iconv OR mbstring extension is required and both are missing. Install either of them or recompile php without --disable-iconv The allow_url_fopen setting is incorrect. Add the following to the end of your `php.ini`: allow_url_fopen = On The php.ini used by your command-line PHP is: /opt/cpanel/ea-php56/root/etc/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.