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<?php $a = []; print_r($a+=['a'=>'1','b'=>'2']); print_r($a+=[]); print_r($a+=['a'=>'3']); print_r($a=array_merge($a,['a'=>'3']));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/mP2CE
function name:  (null)
number of ops:  22
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    4     1        INIT_FCALL                                               'print_r'
          2        ASSIGN_OP                                     1  ~2      !0, <array>
          3        SEND_VAL                                                 ~2
          4        DO_ICALL                                                 
    5     5        INIT_FCALL                                               'print_r'
          6        ASSIGN_OP                                     1  ~4      !0, <array>
          7        SEND_VAL                                                 ~4
          8        DO_ICALL                                                 
    6     9        INIT_FCALL                                               'print_r'
         10        ASSIGN_OP                                     1  ~6      !0, <array>
         11        SEND_VAL                                                 ~6
         12        DO_ICALL                                                 
    7    13        INIT_FCALL                                               'print_r'
         14        INIT_FCALL                                               'array_merge'
         15        SEND_VAR                                                 !0
         16        SEND_VAL                                                 <array>
         17        DO_ICALL                                         $8      
         18        ASSIGN                                           ~9      !0, $8
         19        SEND_VAL                                                 ~9
         20        DO_ICALL                                                 
         21      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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