title: How to install old version of composer
body: <p>I want to install old version of composer. My commands are:</p>
  
  <pre><code>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');"
  </code></pre>
  
  <p>But it didn't install composer. I check with the command <code>composer -v</code> but unfortunately it didn't work. How can I do this?</p>