Your requirements could not be resolved to an installable set of packages.
Problem 1
- atoum/atoum 1.2.5 requires php >=5.3.3,<7 -> your PHP version (7.2.15) does not satisfy that requirement.
- atoum/atoum 1.2.4 requires ext-xml * -> the requested PHP extension xml is missing from your system.
- atoum/atoum 1.2.3 requires ext-xml * -> the requested PHP extension xml is missing from your system.
- atoum/atoum 1.2.2 requires ext-xml * -> the requested PHP extension xml is missing from your system.
- atoum/atoum 1.2.1 requires ext-xml * -> the requested PHP extension xml is missing from your system.
- atoum/atoum 1.2.0 requires ext-xml * -> the requested PHP extension xml is missing from your system.
- atoum/atoum 1.1.0 requires ext-xml * -> the requested PHP extension xml is missing from your system.
- atoum/atoum 1.0.0 requires ext-xml * -> the requested PHP extension xml is missing from your system.
- Installation request for atoum/atoum ~1 -> satisfiable by atoum/atoum[1.0.0, 1.1.0, 1.2.0, 1.2.1, 1.2.2, 1.2.3, 1.2.4, 1.2.5].
So you require "atoum/atoum": "~1" which doesn't support PHP 7.2.
composer install
doesn't work:So you require
"atoum/atoum": "~1"
which doesn't support PHP 7.2.