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

Generated using Vulcan Logic Dumper, using php 8.0.0


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