PHP Variable variables and array key veriables :  I try to create code with out IF: 


      if($lvl==0)
        								{
        									$OutPutArray[0]['follow'][]=$infoArr;
        								}
        								elseif($lvl==1)
        								{
        									$OutPutArray[0]['follow'][0]['follow'][]=$infoArr;
        								}
        								elseif($lvl==2)
        								{
        									$OutPutArray[0]['follow'][0]['follow'][0]['follow'][]=$infoArr;
        								}
        								...

And i whant it to be unlimited)) So i need  something like:  

    $prefix="[some_key]...[some_key]"; 
    ${$prefix}[]=$Array;

Can someone helps or it imposoble?