composer basic command showing errors

[Andressa Lucatelli]

can anyone help me =(

look this uncaught error on my linux mint

[Andressa Lucatelli]

Another error log when install composer:

Some settings on your machine make Composer unable to work properly.

Make sure that you fix the issues listed below and run this script again:

The json extension is missing.

Install it or recompile php without --disable-json

The phar extension is missing.

Install it or recompile php without --disable-phar

The iconv OR mbstring extension is required and both are missing.

Install either of them or recompile php without --disable-iconv