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oop - When should I use stdClass and when should I use an array in php oo code?

In the middle of a period of big refactorings at work, I wish to introduce stdClass ***** as a way to return data from functions and I'm trying to find non-subjectives arguments to support my decision.

Are there any situations when would it be best to use one instead of the other ??

What benefits would I get to use stdClass instead of arrays ??


Some would say that functions have to be as little and specific to be able to return one single value. My decision to use stdClass is temporal, as I hope to find the right Value Objects for each process on the long run.

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The usual approach is

  • Use objects when returning a defined data structure with fixed branches:

     $person
       -> name = "John"
       -> surname = "Miller"
       -> address = "123 Fake St"
    
  • Use arrays when returning a list:

      "John Miller"
      "Peter Miller"
      "Josh Swanson"
      "Harry Miller"
    
  • Use an array of objects when returning a list of structured information:

      $person[0]
        -> name = "John"
        -> surname = "Miller"
        -> address = "123 Fake St"
    
      $person[1]
        -> name = "Peter"
        -> surname = "Miller"
        -> address = "345 High St"
    

Objects are not suitable to hold lists of data, because you always need a key to address them. Arrays can fulfill both functions - hold arbitrary lists, and a data structure.

Therefore, you can use associative arrays over objects for the first and third examples if you want to. I'd say that's really just a question of style and preference.

@Deceze makes a number of good points on when to use an object (Validation, type checking and future methods).


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