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<?php $a = ["username"=> 'asdfasf', 'avatar' => 'test']; $b = ['username' => 'test']; $c = array_merge($a, b); var_dump($c);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/lZveI
function name:  (null)
number of ops:  12
compiled vars:  !0 = $a, !1 = $b, !2 = $c
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    4     1        ASSIGN                                                   !1, <array>
    5     2        INIT_FCALL                                               'array_merge'
          3        SEND_VAR                                                 !0
          4        FETCH_CONSTANT                                   ~5      'b'
          5        SEND_VAL                                                 ~5
          6        DO_ICALL                                         $6      
          7        ASSIGN                                                   !2, $6
    6     8        INIT_FCALL                                               'var_dump'
          9        SEND_VAR                                                 !2
         10        DO_ICALL                                                 
         11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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