composer documentation code example
Example 1: composer install without dependencies
composer install --ignore-platform-reqs
Example 2: upgrade composer
To update composer command just find location of composer.phar and update as:
where composer
cd path_to_composer.phar
php composer.phar self-update
Example 3: getcomposer
php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('sha384', 'composer-setup.php') === 'e0012edf3e80b6978849f5eff0d4b4e4c79ff1609dd1e613307e16318854d24ae64f26d17af3ef0bf7cfb710ca74755a') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php
php -r "unlink('composer-setup.php');"
Example 4: getcomposer
php composer-setup.php --install-dir=bin --filename=composer