Add all digits of a number together function?

[Tipem]

Hey,

How could I add all of the digits of a number together through a function (e.g., 408 would become 4+0+8 = 12, so the output of the function would be 12)? I've never had to do anything like that before in PHP...

Thanks for the help!!
Tipem

[galen]

array_sum(str_split(number))

[Tipem]

Thanks! It works great!