Error updating Docker PHP version for WP-CLI

Hi there,

I have a DevKinsta local site setup using php8.0. When I try to use WP-CLI I am getting errors saying I’m using php7.4.

So I found & followed instructions here:
(I am also using roots/sage and have acorn installed as an MU plugin)

But I’m getting errors in my Terminal after selecting the php version:

www-data@eb548f61a27c:/www/kinsta/public/mysite$ update-alternatives --config php
There are 5 choices for the alternative php (providing /usr/bin/php).

  Selection    Path             Priority   Status
  0            /usr/bin/php8.1   81        auto mode
  1            /usr/bin/php7.2   72        manual mode
  2            /usr/bin/php7.3   73        manual mode
* 3            /usr/bin/php7.4   74        manual mode
  4            /usr/bin/php8.0   80        manual mode
  5            /usr/bin/php8.1   81        manual mode

Press <enter> to keep the current choice[*], or type selection number: 4
update-alternatives: using /usr/bin/php8.0 to provide /usr/bin/php (php) in manual mode
update-alternatives: error: error creating symbolic link '/etc/alternatives/php.dpkg-tmp': Permission denied

Please advise so that I can use WP-CLI :pray:

Many thanks!

Hello Gareth :wave:

Thank you for reporting it here.
As I could see from the report/error, it seems due to the “User Permission” issue as per that message:

update-alternatives: error: error creating symbolic link '/etc/alternatives/php.dpkg-tmp': Permission denied

I noticed that you ran that update-alternatives --config php command line with the user:

I suspect you might be connecting to the local containr/Docker with this command perhaps?

docker exec -it devkinsta_fpm sudo -H -u www-data bash

If that so, please try the following steps instead:

  1. Connect to the local FPM container with:
    docker exec -it devkinsta_fpm bash
    (so it will be using the default root user instead of www-data user)

  2. In the FPM container, type:
    update-alternatives --config php

  3. Select the PHP version from the list (and enter), and done.
    The PHP version should be changed properly now.

Please give it a try and let me know if it works for you.


Works perfectly, thanks Agus!

1 Like

thank you for the update and glad to hear it works perfectly Gareth! :+1:


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