What are the best practices for migrating from PHP 7.3 to a later version due to lack of support?

Due to the lack of support for PHP 7.3, it is recommended to migrate to a later version such as PHP 7.4 or PHP 8 to ensure security updates and compatibility with newer features. To migrate, you should first check for any deprecated features or functions in your codebase and update them accordingly. Additionally, testing your code thoroughly after the migration is crucial to ensure it runs smoothly on the new PHP version.

// Example code snippet for migrating from PHP 7.3 to PHP 7.4
// Before migration
$oldArray = array(1, 2, 3);

// After migration
$newArray = [1, 2, 3];