Xserver共有レンタルサーバのSSHで好きなバージョンのPHPを使う

せこい貧乏人なので、相変わらず共有サーバを使ってます

Xserverの共有レンタルサーバはドメインごとにPHPのバージョンを設定できるが、SSHでログインした場合、デフォルトで5系の最新が動くように設定されており、色々と困る。

$ composer upgrade
Loading composer repositories with package information
Warning from https://repo.packagist.org: Support for Composer 1 is deprecated and some packages will not be available. You should upgrade to Composer 2. See https://blog.packagist.com/deprecating-composer-1-support/
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - twig/twig v2.9.0 requires php ^7.0 -> your PHP version (5.4.16) does not satisfy that requirement.
    - twig/twig v2.8.1 requires php ^7.0 -> your PHP version (5.4.16) does not satisfy that requirement.
    - twig/twig v2.8.0 requires php ^7.0 -> your PHP version (5.4.16) does not satisfy that requirement.
    - twig/twig v2.7.4 requires php ^7.0 -> your PHP version (5.4.16) does not satisfy that requirement.

今までずっと良くわかってなくて詰んでたんだけど

$ ps ux
USER        PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
himitsu+ 122225  0.0  0.0  72336  4692 ?        Ss   19:35   0:00 /usr/libexec/openssh/sftp-server
himitsu+ 214016  0.0  0.0 115748  3832 pts/0    Ss   19:43   0:00 -bash
himitsu+ 290866  0.0  0.0 525952 87192 ?        S    19:58   0:02 /usr/bin/php-fcgi7.0

なんか　/usr/bin/php-fcgi7.0　とかいうやつがあるな

$ php-fcgi7.0 composer.phar
X-Powered-By: PHP/7.0.33
Content-type: text/html; charset=UTF-8
Warning: Composer should be invoked via the CLI version of PHP, not the cgi-fcgi SAPI

なんかおこられた

$ find /usr/bin/php*
/usr/bin/php
/usr/bin/php-cgi
/usr/bin/php-fcgi4.4
/usr/bin/php-fcgi5.1
/usr/bin/php-fcgi5.2
/usr/bin/php-fcgi5.3
/usr/bin/php-fcgi5.4
/usr/bin/php-fcgi5.5
/usr/bin/php-fcgi5.6
/usr/bin/php-fcgi7.0
/usr/bin/php-fcgi7.1
/usr/bin/php-fcgi7.2
/usr/bin/php-fcgi7.3
/usr/bin/php-fcgi7.4
/usr/bin/php-fcgi8.0
/usr/bin/php-fcgi8.1
/usr/bin/php-fcgi8.2
/usr/bin/php4.4
/usr/bin/php5.1
/usr/bin/php5.2
/usr/bin/php5.3
/usr/bin/php5.4
/usr/bin/php5.5
/usr/bin/php5.6
/usr/bin/php5.6-cgi
/usr/bin/php7.0
/usr/bin/php7.0-cgi
/usr/bin/php7.1
/usr/bin/php7.1-cgi
/usr/bin/php7.2
/usr/bin/php7.2-cgi
/usr/bin/php7.3
/usr/bin/php7.3-cgi
/usr/bin/php7.4
/usr/bin/php7.4-cgi
/usr/bin/php8.0
/usr/bin/php8.0-cgi
/usr/bin/php8.1
/usr/bin/php8.1-cgi
/usr/bin/php8.2
/usr/bin/php8.2-cgi
/usr/bin/phpize

なんや、揃ってるやん

$ php7.4 composer.phar
   ______
  / ____/___  ____ ___  ____  ____  ________  _____
 / /   / __ \/ __ `__ \/ __ \/ __ \/ ___/ _ \/ ___/
/ /___/ /_/ / / / / / / /_/ / /_/ (__  )  __/ /
\____/\____/_/ /_/ /_/ .___/\____/____/\___/_/
                    /_/
Composer version 1.6.2 2018-01-05 15:28:41