PHP 8.2: explicitly declare CompositeCommand::$longdesc (#5707)

rodrigoprimo · web-flow · commit a2f0250bf85b · 2022-11-29T15:05:28.000-08:00
This commit fixes the following deprecation warnings when running `wp
--info` with PHP 8.2 RC6:

```
Deprecated: Creation of dynamic property WP_CLI\Dispatcher\CompositeCommand::$longdesc is deprecated in phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Dispatcher/CompositeCommand.php on line 38
Deprecated: Creation of dynamic property WP_CLI\Dispatcher\Subcommand::$longdesc is deprecated in phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Dispatcher/CompositeCommand.php on line 38
Deprecated: Creation of dynamic property WP_CLI\Dispatcher\CommandNamespace::$longdesc is deprecated in phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Dispatcher/CompositeCommand.php on line 38
```

Dynamic properties are deprecated in PHP 8.2. The solution was to simply
declare CompositeCommand::$longdesc before it is used.
diff --git a/php/WP_CLI/Dispatcher/CompositeCommand.php b/php/WP_CLI/Dispatcher/CompositeCommand.php
@@ -16,6 +16,7 @@ class CompositeCommand {
 
 	protected $name;
 	protected $shortdesc;
+	protected $longdesc;
 	protected $synopsis;
 	protected $docparser;
 
