Why is it recommended to omit the closing `?>` tag at the end of a PHP file?

Hello everyone! I'm a beginner PHP developer and recently noticed that in many modern frameworks (Laravel, Symfony) and in the documentation, they often say that the closing `?>` tag at the end of a PHP file should be omitted. Honestly, I don't quite understand why this is necessary. After all, PHP tutorials always show the full construct:\n\n```php\n\n```\n\nI tried removing `?>` in my project, and the code still worked. But I'm bothered by the question: what could go wrong if I leave the closing tag? It doesn't seem like anything bad happens. Maybe it's just some whim of experienced developers?\n\nBut recently I read that this is related to security and HTTP headers. Apparently, due to an accidental space or newline after `?>` you can get a "headers al