How is the sequence of fixture execution performed during their search and application?

In the process of applying fixtures (for example, in testing), their execution sequence is usually determined by:

1. Alphabetical order or the order of fixture file loading.
2. Explicitly specifying dependencies between fixtures (if the framework supports it).
3. Priorities or tags set in the configuration.

For example, in PHPUnit with DoctrineFixturesBundle, fixtures can implement the DependentFixtureInterface to specify which fixtures should be loaded first. This ensures the correct order of data loading.

If the order is not controlled, fixtures may be applied in a random order, which can lead to errors due to missing necessary data.