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<?php $x = false; $y = json_decode($x,true); var_dump(array_key_exists( 'x', $y));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/gerDS
function name:  (null)
number of ops:  11
compiled vars:  !0 = $x, !1 = $y
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <false>
    3     1        INIT_FCALL                                               'json_decode'
          2        SEND_VAR                                                 !0
          3        SEND_VAL                                                 <true>
          4        DO_ICALL                                         $3      
          5        ASSIGN                                                   !1, $3
    6     6        INIT_FCALL                                               'var_dump'
          7        ARRAY_KEY_EXISTS                                 ~5      'x', !1
          8        SEND_VAL                                                 ~5
          9        DO_ICALL                                                 
         10      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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