php-repos.clouding.io - PHP for Ubuntu releases that Sury no longer builds for (14.04 trusty, 16.04 xenial, 18.04 bionic, 20.04 focal).
Built from Ondrej Sury's source packages (including the php2shell CVE-2026-109618/109619 fix), one component per PHP version,
plus "deps" with the extra libraries needed to install them.

  curl -fsSL https://php-repos.clouding.io/php-repos.clouding.io.gpg -o /usr/share/keyrings/php-repos.clouding.io.gpg
  echo "deb [signed-by=/usr/share/keyrings/php-repos.clouding.io.gpg] https://php-repos.clouding.io/ubuntu $(lsb_release -sc) php7.4 deps" > /etc/apt/sources.list.d/php-repos.list
  (replace php7.4 with the PHP version you need; on 14.04 add the key with apt-key instead of signed-by)

Key fingerprint: 2E0FFA9894ECDFB9AEB459427132DE399FE3B85A