php yaml-ext

php73-ext.sh

# Problem: The requested PHP extension ext-yaml * is missing from your system. Install or enable PHP's yaml extension.

sudo apt-get -y install gcc make autoconf libc-dev pkg-config
sudo apt-get -y install libyaml-dev
sudo apt-get -y install php-pear php7.3-yaml
sudo pecl install yaml
sudo touch /etc/php/7.3/cli/conf.d/20-yaml.ini
sudo touch /etc/php/7.3/fpm/conf.d/20-yaml.ini
sudo bash -c "echo extension=yaml.so > /etc/php/7.3/cli/conf.d/20-yaml.ini"
sudo bash -c "echo extension=yaml.so > /etc/php/7.3/fpm/conf.d/20-yaml.ini"
sudo service php7.3-fpm restart
php7.3 -i | grep yaml

composer install