Tell Composer to use Different PHP Version

Ubuntu 18.04 case ... this run for me.

/usr/bin/php7.1 /usr/local/bin/composer update

php linux laravel composer-php

Just add below code to your composer.json file to set different php version:

"config": {    "platform": {        "php": "7.1.3"    }}

php linux laravel composer-php

On xubuntu I had php 7.2 as default. But needed to run composer with php 5.6.

So this worked for me:

php5.6 /usr/bin/composer

CodeHunter