Upgrade PHP composer on a Plesk server like an expert, with this handy guide from Bobcares. 

At Bobcares, we offer solutions for every query, big and small, as a part of our Server Management Service.

Let’s take a look at how our Support Team is ready to help customers with upgrading PHP composer on a Plesk server

How to upgrade PHP composer on a Plesk server

The PHP Composer is a tool we can use for dependency management in PHP. It helps us declare libraries that we require for a project. Moreover, we can install or update libraries as and when we need them for a project.

However, Composer is not a package manager like Yum or Apt. Although it deals with libraries or packages, it manages them on a project basis and installs them in the directory within a project.

In other words, Composer does not install anything globally. But it supports a global project via the global command.

If you are looking for a guide to help you upgrade the PHP composer on your Plesk Server, our Support Team has your back.

For CentOS/RHEL/CloudLinux:

1. First, we will connect to the server through SSH.
2. Then, we will check which version is currently in use :

   # /opt/plesk/php/X.X/bin/php /usr/lib64/plesk-9.0/composer.phar –version

   Here, we have to replace X.X with the current PHP version.
3. The next step is to upgrade or downgrade the version as seen below:

   # /opt/plesk/php/X.X/bin/php /usr/lib64/plesk-9.0/composer.phar self-update

   Here, we have to replace <Version> with the preferred composer version respectively.

   In case this command is not successful, we can give the following command a try:

   # /opt/plesk/php/X.X/bin/php /usr/local/psa/var/modules/composer/composer.phar selfupdate –2

   For instance:

   # /opt/plesk/php/7.3/bin/php /usr/lib64/plesk-9.0/composer.phar self-update 2.0.8
   Upgrading to version 2.0.8 (stable channel).

For Debian/Ubuntu:

1. First, we will connect to the server through SSH.
2. Then, we have to check the version in use currently:

   # /opt/plesk/php/X.X/bin/php /usr/lib/plesk-9.0/composer.phar –version

   Here, we have to replace X.X with the current PHP version.
3. The next step is to upgrade or downgrade the version as seen below:

   # /opt/plesk/php/X.X/bin/php /usr/lib/plesk-9.0/composer.phar self-update

   Here, we have to replace X <Version> with the preferred composer version respectively.

   In case this command is not successful, we can give the following command a try:

   # /opt/plesk/php/X.X/bin/php /usr/local/psa/var/modules/composer/composer.phar selfupdate --2

   For instance:

   # /opt/plesk/php/7.3/bin/php /usr/lib/plesk-9.0/composer.phar self-update 2.0.8
   Upgrading to version 2.0.8 (stable channel).

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Conclusion

In brief, our skilled Support Engineers at Bobcares demonstrated how to upgrade PHP composer on a Plesk server.