Do you think that PHP at CentOS7 base repo is maintain by CentOS team not “3rd party” PHP team?
Well… NOT. Surprise! 
Every bug at PHP is 3rd party case.
But… Do you know that CentOS is a Community distribution as well as Nextcloud is?
Where is your enterprise support now?
Did you see how many issues is at CentOS bug tracker? OMG.
Don’t do the lame shit storm, go to remi repo, install latest PHP and thanks him for his great job.
Or you can compile it by yourself. There is lots of tutorials at web.
Oh, no! You can’t install anything from “random community member”. What a pitty. Maybe try to run Nextcloud without PHP?
EDIT: Wait! If you join here it means you are random community member!
So, let me quote… you – “I will not accept a recommendation from a random community member. No matter how knowledgable that person is (no offense @JaredBusch )”.
Meh. EOT.