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<?php $key; $theme; $key = array_keys($theme)[0];
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/rRLUu
function name:  (null)
number of ops:  6
compiled vars:  !0 = $key, !1 = $theme
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   INIT_FCALL                                               'array_keys'
          1        SEND_VAR                                                 !1
          2        DO_ICALL                                         $2      
          3        FETCH_DIM_R                                      ~3      $2, 0
          4        ASSIGN                                                   !0, ~3
          5      > RETURN                                                   1

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