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<?php $json = '{"2":1}'; $obj = json_decode($json); $arr = get_object_vars($obj); $key = array_key_exists('2', $arr); var_dump($key, $arr);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/CK2Zn
function name:  (null)
number of ops:  16
compiled vars:  !0 = $json, !1 = $obj, !2 = $arr, !3 = $key
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                       !0, '%7B%222%22%3A1%7D'
    3     1        INIT_FCALL                                                   'json_decode'
          2        SEND_VAR                                                     !0
          3        DO_ICALL                                             $5      
          4        ASSIGN                                                       !1, $5
    4     5        INIT_FCALL                                                   'get_object_vars'
          6        SEND_VAR                                                     !1
          7        DO_ICALL                                             $7      
          8        ASSIGN                                                       !2, $7
    5     9        ARRAY_KEY_EXISTS                                     ~9      '2', !2
         10        ASSIGN                                                       !3, ~9
    6    11        INIT_FCALL                                                   'var_dump'
         12        SEND_VAR                                                     !3
         13        SEND_VAR                                                     !2
         14        DO_ICALL                                                     
         15      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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