What are the best practices for managing PHP configuration variables like upload_max_filesize?

When managing PHP configuration variables like upload_max_filesize, it is important to ensure that the value is set appropriately to allow for the desired file upload size. This can be done by updating the php.ini file or using ini_set() function in your PHP script. 

// Update upload_max_filesize in php.ini
upload_max_filesize = 20M
```

```php
// Using ini_set() function in your PHP script
ini_set('upload_max_filesize', '20M');

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PHP configuration variables upload_max_filesize management best practices

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