how php array_multisort work?

Question

i have some problem to understand array_multisort

See how it sorts when two values are the same:

 $a1=array(\"Dog\",\"Dog\",\"Cat\");
 $a2=array(\"P         


        

Answer 1

If you look at the documentation and the first example, you'll notice that this is the expected behavior.

With two arguments, both arrays: the first array is sorted; the second array will have its corresponding values re-arranged and sorted if the corresponding values in first column tie. As for your example, think of it as you're doing a SQL ORDER BY Animal, Name:

1. Cat comes first
2. The two Dogs have a tie so Fido comes first because Fido < Pluto