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Revise PHP upgrade instructions in README #703

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Revise PHP upgrade instructions in README
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29 changes: 17 additions & 12 deletions other-docs/guides/updating-php/README.md
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Expand Up @@ -106,24 +106,29 @@ page.
You can add these to the ignored directories in the command when checking if desired;
e.g. `--ignore=vendor/aws,vendor/guzzlehttp,...`.

## Requesting A Cloud Environment Update
## Upgrading the Altis Cloud Environment

Once you are confident that your application is compatible with the version of PHP to upgrade to you should do the
following for each environment:
When you're happy your custom application code, themes, plugins, and dependencies are fully compatible with the target PHP version. *It is recommended to test the upgrade in a non-production environment first.*

1. Create a support ticket for the target environment with the type "Task", titled "Upgrade to PHP 8.3", replacing "8.3"
with the target version if necessary ( noting that the updated PHP version will not be deployed automatically until
the next application deployment ).
2. Wait for the Altis team to confirm the environment has been updated.
3. Deploy the updated application code.
Steps to change the PHP version:

**Note:** We recommend starting with your non production environments first.
1. Log in to the Altis Dashboard:
https://dashboard.altis-dxp.com/

See the [Getting Help With Altis guide](../getting-help-with-altis.md) for more information on creating support tickets.
2. Select the environment where you want to update the PHP version (e.g., Development, Staging, or Production).

The Altis team will follow up with you on the ticket once the environment has been updated.
3. Navigate to:
Settings → Environment

Once your environment has been upgraded, the PHP upgrade will take effect upon the next application deployment.
4. In the Environment panel, locate the PHP version selector and choose the desired supported PHP version from the dropdown. Click Update to save the change.

5. Trigger a deployment - The PHP version change will not take effect until a new deployment is performed. Go to the Release tab in the Altis Dashboard and initiate a new deployment (or redeploy the latest release). Once the deployment finishes successfully, the environment will be running the selected PHP version.

Post-upgrade recommendations:
- Verify the site loads correctly.
- Check application logs for PHP warnings or errors.
- Test critical functionality and background jobs.
- Monitor performance and error reporting for a short period after deployment.

## Re-Enable Composer's Platform Check

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