This is a tracking bug for Change: PHP 7.1
For more details, see: https://fedoraproject.org//wiki/Changes/php71
Update the PHP stack in Fedora to latest version 7.1.x
php-7.1.0-0.1.RC6.fc26 is built + all (most of) the dependent extensions.
This bug appears to have been reported against 'rawhide' during the Fedora 26 development cycle.
Changing version to '26'.