how do I create a multidimensional associative array inside of a foreach loop?

Question

I want to create an array that looks like this

 $appsByOs = Array(
                  osName1 =>Array(0=>app1,1=>app2)
                  osName2 =>Array(0=>app1,1=>app2)
                  etc.....
  )

how could i do this inside of a foreach loop?

  foreach($osInstanceNames as $osInstanceName){
                    $appNames(array of app names for current os)

            }

thanks

Answer 1

All you should need to do is this.

 $appsByOs = Array();
 foreach($osInstanceNames as $osInstanceName){
                     $appsByOs[$osInstanceName] = $appNames;

 }

Answer 2

Recovering the last post and adding the possibility to have more than one app for an os instance

 $appsByOs = Array(); 
 foreach($osInstanceNames as $osInstanceName){ 
                     $appsByOs[$osInstanceName][] = $appNames; 

 }