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<?php $ar = []; $ar['one'][] = 1; $ar['one'][] = 2; $ar['two'][] = 1; $ar['two'][] = 2; $ar['three'][] = 1; $ar['three'][] = 2; print_r($ar); $keys = array_keys($ar); $vals = array_column($ar,0); $res = array_combine($keys,$vals); print_r($res);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ImkUV
function name:  (null)
number of ops:  40
compiled vars:  !0 = $ar, !1 = $keys, !2 = $vals, !3 = $res
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
    4     1        FETCH_DIM_W                                          $5      !0, 'one'
          2        ASSIGN_DIM                                                   $5
          3        OP_DATA                                                      1
    5     4        FETCH_DIM_W                                          $7      !0, 'one'
          5        ASSIGN_DIM                                                   $7
          6        OP_DATA                                                      2
    6     7        FETCH_DIM_W                                          $9      !0, 'two'
          8        ASSIGN_DIM                                                   $9
          9        OP_DATA                                                      1
    7    10        FETCH_DIM_W                                          $11     !0, 'two'
         11        ASSIGN_DIM                                                   $11
         12        OP_DATA                                                      2
    8    13        FETCH_DIM_W                                          $13     !0, 'three'
         14        ASSIGN_DIM                                                   $13
         15        OP_DATA                                                      1
    9    16        FETCH_DIM_W                                          $15     !0, 'three'
         17        ASSIGN_DIM                                                   $15
         18        OP_DATA                                                      2
   11    19        INIT_FCALL                                                   'print_r'
         20        SEND_VAR                                                     !0
         21        DO_ICALL                                                     
   13    22        INIT_FCALL                                                   'array_keys'
         23        SEND_VAR                                                     !0
         24        DO_ICALL                                             $18     
         25        ASSIGN                                                       !1, $18
   14    26        INIT_FCALL                                                   'array_column'
         27        SEND_VAR                                                     !0
         28        SEND_VAL                                                     0
         29        DO_ICALL                                             $20     
         30        ASSIGN                                                       !2, $20
   15    31        INIT_FCALL                                                   'array_combine'
         32        SEND_VAR                                                     !1
         33        SEND_VAR                                                     !2
         34        DO_ICALL                                             $22     
         35        ASSIGN                                                       !3, $22
   17    36        INIT_FCALL                                                   'print_r'
         37        SEND_VAR                                                     !3
         38        DO_ICALL                                                     
         39      > RETURN                                                       1

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