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 ubuntu 14.04 for me, I found that the default permissions for the php.ini file /etc/php5/cli/ restrict the file to Root user only, so if you run:

php -m

as non-root, you get far fewer modules than if you run sudo php -m

The fix for this was for me to perform:

sudo chmod a+rx /etc/php5/cli/* -R 

which grants read and execute permissions for that folder and it's contents to everyone.

Answer 2

Bug php not load extension install

create file php.ini

# /etc/php/7.2/cli/conf.d/php.ini
extension=json.so
extension=phar.so
extension=iconv.so

Answer 3

You probably need to enable the extension in your php.ini file. To find out where that is for command line PHP, do

php --ini

You should see a line like

Loaded Configuration File: /path/to/php.ini

Open that file and look for extension=json.so. If it's there, uncomment it. If not, add it in. Now you should see json listed when you do php -m and composer should work.

Answer 4

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

Answer 5

I encountered the same error, but the difference was that when I ran php -m the json module was not listed, so I just installed json PHP module using the command below:

sudo yum install php-json

the error was fixed and I was able to install composer. I was using CentOS 8 stream, PHP7.2.