How to install old version of composer [duplicate]

Question

I want to install old version of composer. My commands are:

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('sha384', 'composer-setup.php') === 'baf1608c33254d00611ac1705c1d9958c817a1a33bce370c0595974b342601bd80b92a3f46067da89e3b06bff421f182') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php --version=1.4.1
php -r "unlink('composer-setup.php');"

But it didn't install composer. I check with the command composer -v but unfortunately it didn't work. How can I do this?

Answer 1

These commands will install composer binary in composer.phar file in current working directory. You may try to verify this by running php composer.phar -v command. composer command will most like point to some global installation in your system - you need to move new binary to correct place, so it could be recognized as global command (see docs):

mv composer.phar /usr/local/bin/composer

---

If you have already Composer installed, you should able to use self-update command to downgrade to any version:

composer self-update 1.4.1

or

sudo -H composer self-update 1.4.1

Answer 2

If you came here searching for downgrading from composer 2.0 to 1.0

composer self-update --1

Answer 3

Curl can be used to download a specific version:

curl -O "https://getcomposer.org/download/1.10.17/composer.phar"
chmod a+x composer.phar
sudo mv composer.phar /usr/local/bin/composer