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<?php $a = ['123' => 'abc']; $b = ['123' => 'foobar']; var_dump(array_merge($a, $b)); var_dump($a+$b);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Ag5KV
function name:  (null)
number of ops:  14
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
    4     1        ASSIGN                                                       !1, <array>
    6     2        INIT_FCALL                                                   'var_dump'
          3        INIT_FCALL                                                   'array_merge'
          4        SEND_VAR                                                     !0
          5        SEND_VAR                                                     !1
          6        DO_ICALL                                             $4      
          7        SEND_VAR                                                     $4
          8        DO_ICALL                                                     
    7     9        INIT_FCALL                                                   'var_dump'
         10        ADD                                                  ~6      !0, !1
         11        SEND_VAL                                                     ~6
         12        DO_ICALL                                                     
         13      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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