Ubuntu下PHP 7和PHP 8多版本共存以及composer指定版本

sudo add-apt-repository ppa:ondrej/php
sudo apt update
sudo apt upgrade

sudo apt install php7.4-common php7.4-cgi php7.4-gd php7.4-mysql php7.4-xml php7.4-cli php7.4-json php7.4-sqlite3 php7.4-xmlrpc php7.4-bcmath php7.4-enchant
php7.4-opcache php7.4-readline php7.4-xsl php7.4-bz2 php7.4-curl  php7.4-fpm php7.4-mbstring php7.4-pgsql php7.4-tidy php7.4-zip

sudo apt install php8.0-common php8.0-cgi php8.0-gd php8.0-mysql php8.0-xml php8.0-cli php8.0-sqlite3 php8.0-xmlrpc php8.0-bcmath php8.0-enchant php8.0-opcache php8.0-readline php8.0-xsl php8.0-bz2 php8.0-curl  php8.0-fpm php8.0-mbstring php8.0-pgsql php8.0-tidy php8.0-zip

php -r "copy('https://install.phpcomposer.com/installer', 'composer-setup.php');"
php composer-setup.php
php -r "unlink('composer-setup.php');"
sudo mv composer.phar /usr/local/bin/composer

composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/

php8.0 /usr/local/bin/composer
php7.4 /usr/local/bin/composer
alias composer7='php7.4 /usr/local/bin/composer'
alias composer8='php8.0 /usr/local/bin/composer'

symfony local:php:list

┌─────────┬────────────┬────────────┬─────────┬─────────┬─────────┬─────────┐
│ Version │ Directory  │  PHP CLI   │ PHP FPM │ PHP CGI │ Server  │ System? │
├─────────┼────────────┼────────────┼─────────┼─────────┼─────────┼─────────┤
│ 7.4.14  │ /usr/local │ bin/php    │         │         │ PHP CLI │ *       │
│ 7.4.16  │ /usr       │ bin/php7.4 │         │         │ PHP CLI │         │
└─────────┴────────────┴────────────┴─────────┴─────────┴─────────┴─────────┘

echo 7 > .php-version

echo 8 > .php-version

symfony composer install