Merge pull request #674 from humanmade/issue-1836-add-support-for-php-8.4

Update docs to include PHP 8.4

Author: mikelittle

other-docs/getting-started/install-php.md

@@ -70,10 +70,11 @@ php -v
 You should see an output similar to 
 
 ```shell
-PHP 8.2.28 (cli) (built: Mar 13 2025 18:21:38) (NTS)
+PHP 8.3.27 (cli) (built: Oct 21 2025 14:53:41) (NTS)
 Copyright (c) The PHP Group
-Zend Engine v4.2.28, Copyright (c) Zend Technologies
-    with Zend OPcache v8.2.28, Copyright (c), by Zend Technologies
+Zend Engine v4.3.27, Copyright (c) Zend Technologies
+  with Xdebug v3.4.5, Copyright (c) 2002-2025, by Derick Rethans
+  with Zend OPcache v8.3.27, Copyright (c), by Zend Technologies
 ```
 
 **Note:**  Different Linux distributions will have different PHP versions in their package repositories (above output is from

other-docs/guides/migrating/README.md

@@ -134,8 +134,8 @@ following lines inside the top-level object (make sure to add any commas as need
     },
     "config": {
         "platform": {
-            "php": "8.1",
-            "ext-mbstring": "8.1"
+            "php": "8.3",
+            "ext-mbstring": "8.3"
         },
         "allow-plugins": {
             "composer/installers": true,

other-docs/guides/updating-php/README.md

@@ -10,12 +10,13 @@ There are 2 key steps to getting ready for a new version of PHP:
 
 ## Altis Compatibility Chart
 
-| Altis | PHP 8.3        | PHP 8.2       | PHP 8.1       |
-|-------|----------------|---------------|---------------|
-| v24   | **Supported**  | **Supported** | *Deprecated*  |
-| v23   | **Supported**  | **Supported** | *Deprecated*  |
-| v22   | **Supported**  | **Supported** | **Supported** |
-| v21   | *Experimental* | **Supported** | **Supported** |
+| Altis | PHP 8.4       | PHP 8.3        | PHP 8.2       | PHP 8.1       |
+|-------|---------------|----------------|---------------|---------------|
+| v25   | **Supported** | **Supported**  | *Deprecated*  | *Deprecated*  |
+| v24   |               | **Supported**  | **Supported** | *Deprecated*  |
+| v23   |               | **Supported**  | **Supported** | *Deprecated*  |
+| v22   |               | **Supported**  | **Supported** | **Supported** |
+| v21   |               | *Experimental* | **Supported** | **Supported** |
 
 ## Checking PHP Version Compatibility
 
@@ -30,7 +31,7 @@ In your `composer.json` you may have some code like the following:
 {
     "config": {
         "platform": {
-            "php": "8.2"
+            "php": "8.3"
         }
     }
 }
@@ -74,11 +75,11 @@ First install the standard and dependencies using the following command:
 composer global require dealerdirect/phpcodesniffer-composer-installer phpcompatibility/php-compatibility
 ```
 
-Next run the standard against your codebase for the target PHP version, in this example PHP 8.2:
+Next run the standard against your codebase for the target PHP version, in this example PHP 8.3:
 
 ```shell
 phpcs -p --standard=PHPCompatibility \
-  --runtime-set testVersion 8.2 \
+  --runtime-set testVersion 8.3 \
   --extensions=php \
   -d memory_limit=1G \
   --ignore=wordpress,vendor/altis,\*/tests/\* .
@@ -111,7 +112,7 @@ e.g. `--ignore=vendor/aws,vendor/guzzlehttp,...`.
 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:
 
-1. Create a support ticket for the target environment with the type "Task", titled "Upgrade to PHP 8.2", replacing "8.2"
+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.
@@ -136,7 +137,7 @@ your PHP version.
 The easiest way to add this is to run:
 
 ```sh
-composer config platform.php 8.2
+composer config platform.php 8.3
 ```
 
-(Replace 8.2 with your desired new PHP version.)
+(Replace 8.3 with your desired new PHP version.)