Installing Composer in your hosting account

Composer is the dependency manager for PHP projects (Laravel, Symfony, WordPress packages, and more). You can install it inside your own cPanel account using the built-in Terminal — no SSH client, keys, or support ticket required.

Before you start: everything below runs in cPanel's built-in Terminal. It helps to know your account's PHP version first (cPanel → MultiPHP Manager) — Composer 2 needs PHP 7.2 or newer.

Step 1 — Open the Terminal in cPanel

Log in to cPanel and open Terminal (in the Advanced section, or type "Terminal" in the search box). Accept the one-time notice — I understand and want to proceed. A terminal opens, already logged in to your account; the prompt looks like username@server:~$. Run every command below there.

Step 2 — Download and install Composer

Paste this whole block. It creates a bin folder in your home directory, downloads the official installer, verifies it, and installs Composer.

mkdir -p ~/bin
cd ~

# download the installer and verify its signature (official source)
EXPECTED="$(php -r "copy('https://composer.github.io/installer.sig','php://stdout');")"
php -r "copy('https://getcomposer.org/installer','composer-setup.php');"
php -r "echo (hash_file('sha384','composer-setup.php')==='$EXPECTED')?'installer OK'.PHP_EOL:'CHECKSUM MISMATCH'.PHP_EOL;"

# install Composer into ~/bin, then clean up
php composer-setup.php --install-dir="$HOME/bin" --filename=composer
rm -f composer-setup.php

You should see installer OK, then Composer (version 2.x.x) successfully installed. If you see CHECKSUM MISMATCH, don't continue — delete composer-setup.php and run the block again.

Step 3 — Make the composer command available

# add ~/bin to your PATH permanently, and for the current session
grep -q 'HOME/bin' ~/.bashrc || echo 'export PATH="$HOME/bin:$PATH"' >> ~/.bashrc
export PATH="$HOME/bin:$PATH"

Step 4 — Confirm it works

composer --version

A line such as Composer version 2.8.x means you're done.

Using Composer

Run Composer from the folder that holds your project's composer.json:

cd ~/public_html/myapp        # go to your project
composer install             # install everything in composer.json
composer require guzzlehttp/guzzle   # add a package
composer update              # update packages
composer dump-autoload       # rebuild the autoloader

To use a specific PHP version, call Composer through that PHP binary:

/opt/cpanel/ea-php82/root/usr/bin/php ~/bin/composer install

Swap ea-php82 for the version you need. Update Composer itself with composer self-update.

Troubleshooting

• composer: command not found — run source ~/.bashrc or reopen the Terminal. Fallback: full path ~/bin/composer.
• Could not open input file: composer — check it exists with ls -l ~/bin/composer, then redo Step 3.
• Cannot run on non-CLI SAPI — call a CLI PHP directly: /opt/cpanel/ea-php82/root/usr/bin/php ~/bin/composer ...
• Allowed memory size exhausted — COMPOSER_MEMORY_LIMIT=-1 composer update
• CHECKSUM MISMATCH — rm -f ~/composer-setup.php and repeat Step 2.

Note: Composer runs in the cPanel Terminal only — not the File Manager. Always use the official getcomposer.org installer shown here. Don't see Terminal in cPanel? Contact support to enable it.