How to upgrade PHP composer on a Plesk server

Alexey Lapshin

Updated December 29, 2020 17:20

Plesk for Linux kb: how-to ABT: Group B

Applicable to:

How to upgrade PHP composer on a Plesk server?

Instructions for CentOS/RHEL/CloudLinux

Connect to the server via SSH
Check what version is currently used:

Note: replace X.X with the current PHP version and <Version> with the desired composer version.

# /opt/plesk/php/X.X/bin/php /usr/lib64/plesk-9.0/composer.phar --version
Update or downgrade to the specified version:

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

For example:

# /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).

Instructions for Debian/Ubuntu

Connect to the server via SSH
Make sure which version is currently used:
Note: replace X.X with the current PHP version and <Version> with the desired composer version.

# /opt/plesk/php/X.X/bin/php /usr/lib/plesk-9.0/composer.phar --version
Update or downgrade to the specified version:

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

For example:

# /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).