How To Install Composer On Ubuntu
Composer is a package manager for PHP.
Most PHP frameworks and projects utilize its feature for updates. Learn more at Composer’s official website.
Requirements
You need curl to download composer and you need php to run composer.
sudo apt update && sudo apt upgrade -y
sudo apt install php-cli php-curl php-xml curl
Extras
wget and apt-utils have nothing to do with composer, but I commonly use them in these tutorials, now would be a good time to install them. Feel free to skip this step.
sudo apt-get install -y wget apt-utils git php-intl
Install composer
Installing composer is really easy, you just need to run the following one liner:
sudo curl -sS https://getcomposer.org/installer | sudo php -- --install-dir=/usr/local/bin --filename=composer
Download’s the installer from the official website and installs it to the global bin directory as just ‘composer’. It requires root permissions for install.
Using Composer
To list available commands for composer use list:
composer list
To install the defined dependencies for your project, run the install command.
composer install
Find Packages
You can see packages available for download by going to Packagist.
Bash script
# Check if composer is installed and install it if not
if ! command -v composer &> /dev/null
then
echo "Composer not found, installing..."
EXPECTED_CHECKSUM="$(curl -s https://composer.github.io/installer.sig)"
php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
ACTUAL_CHECKSUM="$(php -r "echo hash_file('sha384', 'composer-setup.php');")"
if [ "$EXPECTED_CHECKSUM" != "$ACTUAL_CHECKSUM" ]
then
>&2 echo 'ERROR: Invalid installer checksum'
rm composer-setup.php
exit 1
fi
php composer-setup.php --quiet
RESULT=$?
rm composer-setup.php
sudo mv composer.phar /usr/local/bin/composer
if [ $RESULT -eq 0 ]
then
echo "Composer installed successfully"
else
echo "Error installing Composer"
exit 1
fi
fi