Outdated PhP Support

If you want to have a look at doing this yourself you could probably make a new code hints file something like this:

1) Make a copy of this file: located at: C:\Program Files\Adobe\Adobe Dreamweaver 2021\configuration\CodeHints\php_7_codehints.xml

2) rename the copied file  php_8_codehints.xml

3) Edit as required and copy to path which should be something like: C:\Users\<username>\AppData\Roaming\Adobe\Dreamweaver 2021\en_US\Configuration\CodeHints

For Mac users, path to configuration folder is something like: Users : <username> : Library : Application Support : Adobe : Dreamweaver <version> : <language> : Configuration : 

Which version of PHP does your remote server have?

If unsure, copy this code into a PHP file and upload it to your remote server.

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>PHP Info Test</title>
</head>
<body>
<?php phpinfo() ?>
</body>
</html>

What to know when migrating to newer PHP versions.

https://www.php.net/manual/en/migration80.php

try VSCode or RapidPHP, the latter is only available for windows.

There won't be any more updates as far as we know. Adobe has said Dreamweaver will now only be minimally maintained. No new features are expected. You need to consider migrating to an alternative  editor if youre a serious developer, for php development  l would try php storm, a paid for option with php support as default  or VS Code a free editor,  which has many php plugins available.