How to Install Composer in CWP, Vesta, cPanel, and Plesk on CentOS/Ubuntu

How to Install Composer in CWP, Vesta, cPanel, and Plesk on CentOS/Ubuntu


Composer is a widely-used dependency management tool for PHP. It simplifies the process of declaring and managing libraries for your PHP projects. In this tutorial, we will cover the steps to install Composer, update it, and configure it to work with different PHP versions on various control panels like CWP, Vesta, cPanel, and Plesk.

Installing Composer

Step 1: Navigate to the installation directory

Switch to the /usr/local/bin directory to install Composer globally:

cd /usr/local/bin

Step 2: Download Composer

Use the following curl command to download the stable version of Composer:

curl https://getcomposer.org/composer-stable.phar -o composer

Step 3: Set file permissions

Grant execution permissions to the Composer binary to ensure it can be accessed globally:

chmod 755 /usr/local/bin/composer

Step 4: Configure for Ubuntu/Debian

On Ubuntu or Debian systems, create a symbolic link to make Composer accessible from /usr/bin:

ln -s /usr/local/bin/composer /usr/bin/composer

Composer is now successfully installed. You can use the composer command from the shell to manage PHP dependencies.

Verifying Installation

To check the installed Composer version, use the following command:

composer -V

Example output:

[root@server bin]# composer -V  
Do not run Composer as root/super user! See https://getcomposer.org/root for details  
Continue as root/super user [yes]? yes  
Composer version 2.0.7 2020-11-13 17:31:06

Updating Composer

To update Composer to the latest stable version, run:

composer self-update

This command ensures that you are using the most up-to-date version of Composer.

Running Composer with Different PHP Versions

If your server has multiple PHP versions installed, you can specify the desired PHP version by providing its full binary path. For example:

/path/to/php-bin /usr/local/bin/composer install

Composer Commands for Specific Panels

CWP (Control Web Panel)

Using PHP Selector:

/opt/alt/php56/usr/bin/php /usr/local/bin/composer install  
/opt/alt/php70/usr/bin/php /usr/local/bin/composer install  
/opt/alt/php71/usr/bin/php /usr/local/bin/composer install  
/opt/alt/php72/usr/bin/php /usr/local/bin/composer install  
/opt/alt/php73/usr/bin/php /usr/local/bin/composer install

Using PHP-FPM Selector:

/opt/alt/php-fpm56/usr/bin/php /usr/local/bin/composer install  
/opt/alt/php-fpm70/usr/bin/php /usr/local/bin/composer install  
/opt/alt/php-fpm71/usr/bin/php /usr/local/bin/composer install  
/opt/alt/php-fpm72/usr/bin/php /usr/local/bin/composer install  
/opt/alt/php-fpm73/usr/bin/php /usr/local/bin/composer install

cPanel/WHM

Use the following commands to run Composer with specific PHP versions:

ea-php71 /usr/local/bin/composer install
ea-php72 /usr/local/bin/composer install
ea-php73 /usr/local/bin/composer install

For other control panels, refer to their official documentation to find the paths to PHP binaries.

Troubleshooting

If you encounter the error:

/usr/bin/env: ‘php’: No such file or directory

This means PHP is not installed in the default location. Specify the full path to the PHP binary to resolve this issue.

That’s It!

Composer is now ready to manage your PHP dependencies efficiently. By following these steps, you can ensure compatibility with various control panels and PHP versions on your server.

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