`php-version` in Fish

php-version.fish

function php-version
  set -l env_file (mktemp -t php-version.fish.XXXXXXXXXX)
  bash -c 'echo "$@"; source $(brew --prefix php-version)/php-version.sh; php-version "$@"; status=$?; env > "$0"; exit $status' $env_file $argv

  # apply php-version_* and *PATH variables from the captured environment
  echo (cat $env_file)
  # and eval (grep '^php-version\|^[^=]*PATH' $env_file | sed '/^[^=]*PATH/y/:/ /; s/^/set -xg /; s/=/ /; s/$/ ;/; s/(//; s/)//')
  # clean up
  rm -f $env_file
end