Cara Install Composer di Ubuntu

php --version

sudo apt update
sudo apt install php-cli php-mbstring php-curl php-zip php-intl git unzip -y

# Update package list
sudo apt update && sudo apt upgrade -y

# Install Composer dari repository Ubuntu
sudo apt install composer -y

# Verifikasi instalasi
composer --version

Composer version 2.7.1 2024-02-09 15:26:28

# Download installer
php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"

# Dapatkan hash terbaru untuk verifikasi
HASH="$(curl -sS https://composer.github.io/installer.sig)"

# Verifikasi integritas installer
php -r "if (hash_file('SHA384', 'composer-setup.php') === '$HASH') { echo 'Installer verified'.PHP_EOL; } else { echo 'Installer corrupt'.PHP_EOL; unlink('composer-setup.php'); exit(1); }"

# Install ke /usr/local/bin agar bisa diakses global
sudo php composer-setup.php --install-dir=/usr/local/bin --filename=composer

# Cleanup installer
php -r "unlink('composer-setup.php');"

composer --version

Composer version 2.8.9 2025-05-13 12:15:00

# Download Composer PHAR terbaru
curl -sS https://getcomposer.org/download/latest-stable/composer.phar -o composer.phar

# Verifikasi executable
php composer.phar --version

# Pindahkan ke direktori global
sudo mv composer.phar /usr/local/bin/composer
sudo chmod +x /usr/local/bin/composer

# Install Composer via Snap
sudo snap install composer --classic

# Verifikasi
composer --version

# Buat direktori global composer
mkdir -p ~/.config/composer

# Tambahkan ke PATH (edit ~/.bashrc)
echo 'export PATH="$PATH:$HOME/.config/composer/vendor/bin"' >> ~/.bashrc
source ~/.bashrc

# Edit php.ini untuk CLI
sudo nano /etc/php/8.3/cli/php.ini

# Cari dan ubah:
memory_limit = 2G

# Allow plugins (default enabled)
composer config --global allow-plugins true

# Install useful global packages
composer global require laravel/installer
composer global require symfony/cli

# Update ke versi stable terbaru
composer self-update

# Update ke versi preview (alpha/beta)
composer self-update --preview

# Update ke versi LTS (2.2.x)
composer self-update --2.2

# Rollback jika ada masalah
composer self-update --rollback

# Buat direktori proyek
mkdir my-php-project && cd my-php-project

# Inisialisasi composer.json
composer init

# Install package populer
composer require monolog/monolog
composer require vlucas/phpdotenv

<?php
namespace MyApp;

class MyClass
{
    public function sayHello(): string
    {
        return "Hello from Composer 2.8.9!";
    }
}

{
    "autoload": {
        "psr-4": {
            "MyApp\\": "src/"
        }
    }
}

composer dump-autoload

{
    "scripts": {
        "test": "phpunit",
        "stan": "phpstan analyse src",
        "cs-fix": "php-cs-fixer fix",
        "dev": [
            "@test",
            "@stan"
        ]
    }
}

composer run-script dev
# atau singkatnya:
composer dev

# Cek kerentanan keamanan
composer audit

# Audit dengan format JSON
composer audit --format=json

# Selalu commit composer.lock
git add composer.lock
git commit -m "Lock dependencies"

# Install exact versions dari lock file
composer install --no-dev --optimize-autoloader

{
    "config": {
        "platform": {
            "php": "8.3.0",
            "ext-gd": "*",
            "ext-pdo": "*"
        }
    }
}

# Temporary fix
php -d memory_limit=2G $(which composer) install

# Permanent fix
echo 'alias composer="php -d memory_limit=2G /usr/local/bin/composer"' >> ~/.bashrc

# Fix ownership
sudo chown -R $USER:$USER ~/.config/composer
sudo chown -R $USER:$USER vendor/

# Fix cache permissions
composer clear-cache

# Disable SSL verification (not recommended for production)
composer config --global disable-tls true

# Better: Update CA certificates
sudo apt update && sudo apt install ca-certificates

# Check current version
composer --version

# Upgrade to 2.x
composer self-update --2

# Verify upgrade
composer --version

# Set parallel processes (default: 12)
composer config --global process-timeout 2000
composer config --global cache-files-maxsize "1024MiB"

# Development
composer install

# Production
composer install --no-dev --optimize-autoloader --classmap-authoritative

# Enable global cache
composer config --global cache-dir ~/.cache/composer

# Clear cache if needed
composer clear-cache

# Install Laravel via Composer
composer global require laravel/installer
laravel new my-laravel-app

# Install Symfony CLI
composer global require symfony/cli
symfony new my-symfony-app

# PHPUnit
composer require --dev phpunit/phpunit

# PHPStan
composer require --dev phpstan/phpstan

# PHP CS Fixer
composer require --dev friendsofphp/php-cs-fixer

# Install dependencies
composer install

# Update dependencies  
composer update

# Add new package
composer require vendor/package

# Remove package
composer remove vendor/package

# Check for security issues
composer audit

# Update composer itself
composer self-update