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<?php $str1 = 'meh'; $str2 = 'waff'; echo implode(array(array_keys(array_combine(array($str1), array($str2)))[0], array_combine(array($str1), array($str2))[array_keys(array_combine(array($str1), array($str2)))[0]]));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ITkT5
function name:  (null)
number of ops:  36
compiled vars:  !0 = $str1, !1 = $str2
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 'meh'
    3     1        ASSIGN                                                   !1, 'waff'
    4     2        INIT_FCALL                                               'implode'
          3        INIT_FCALL                                               'array_keys'
          4        INIT_FCALL                                               'array_combine'
          5        INIT_ARRAY                                       ~4      !0
          6        SEND_VAL                                                 ~4
          7        INIT_ARRAY                                       ~5      !1
          8        SEND_VAL                                                 ~5
          9        DO_ICALL                                         $6      
         10        SEND_VAR                                                 $6
         11        DO_ICALL                                         $7      
         12        FETCH_DIM_R                                      ~8      $7, 0
         13        INIT_ARRAY                                       ~9      ~8
         14        INIT_FCALL                                               'array_combine'
         15        INIT_ARRAY                                       ~10     !0
         16        SEND_VAL                                                 ~10
         17        INIT_ARRAY                                       ~11     !1
         18        SEND_VAL                                                 ~11
         19        DO_ICALL                                         $12     
         20        INIT_FCALL                                               'array_keys'
         21        INIT_FCALL                                               'array_combine'
         22        INIT_ARRAY                                       ~13     !0
         23        SEND_VAL                                                 ~13
         24        INIT_ARRAY                                       ~14     !1
         25        SEND_VAL                                                 ~14
         26        DO_ICALL                                         $15     
         27        SEND_VAR                                                 $15
         28        DO_ICALL                                         $16     
         29        FETCH_DIM_R                                      ~17     $16, 0
         30        FETCH_DIM_R                                      ~18     $12, ~17
         31        ADD_ARRAY_ELEMENT                                ~9      ~18
         32        SEND_VAL                                                 ~9
         33        DO_ICALL                                         $19     
         34        ECHO                                                     $19
         35      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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