How can the charset of a PHP file affect session handling and header output?

The charset of a PHP file can affect session handling and header output if it is not set correctly. To ensure proper session handling and header output, it is recommended to set the charset in the PHP file to UTF-8. This can be done by including the following line at the beginning of the PHP file: 

```php
header('Content-Type: text/html; charset=UTF-8');
```

By setting the charset to UTF-8, you can prevent any encoding issues and ensure that the session data and headers are handled correctly.

Keywords

charset PHP file session handling header output encoding

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