If your staging site crashes after the update, it confirms that at least one plugin or your theme is incompatible with PHP 8.3. Step 3: Use the Health Check & Troubleshooting Plugin ...

Code with Higher Quality: One of the major differences you will notice with PHP 8 is that many of the warnings and notices that were hard to catch are now classified as code exceptions or errors ...

The PHP developers have released PHP 8.3.12 and 8.2.24. They close several security vulnerabilities, some of which are critical.

New DOM API in PHP 8.4.1 brings standards-compliant support for parsing HTML5 documents and adds functions to make working with documents more convenient.