Composer installing: the json extension is missing

Question

I wrote in Linux Terminal: curl -s https://getcomposer.org/installer | php It said:

 #!/usr/bin/env php
Some settings on your machine make Com         


        

Answer 1

On Centos 8 with PHP 7.2, after comprehensive research, I have concluded that the only solid way to fix it is reinstalling PHP with its newest version. (7.4 was the latest version for me) Here you can find others who share the same conclusion; laracasts