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<?php $a = NAN; var_dump($a == $a); var_dump($a === $a); $a = [NAN]; $b = [NAN]; var_dump($a == $a); var_dump($a === $a); var_dump($a == $b); var_dump($a === $b);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/VWf7pJ
function name:  (null)
number of ops:  28
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, NAN
    4     1        INIT_FCALL                                               'var_dump'
          2        IS_EQUAL                                         ~3      !0, !0
          3        SEND_VAL                                                 ~3
          4        DO_ICALL                                                 
    5     5        INIT_FCALL                                               'var_dump'
          6        IS_IDENTICAL                                     ~5      !0, !0
          7        SEND_VAL                                                 ~5
          8        DO_ICALL                                                 
    7     9        ASSIGN                                                   !0, <array>
    8    10        ASSIGN                                                   !1, <array>
    9    11        INIT_FCALL                                               'var_dump'
         12        IS_EQUAL                                         ~9      !0, !0
         13        SEND_VAL                                                 ~9
         14        DO_ICALL                                                 
   10    15        INIT_FCALL                                               'var_dump'
         16        IS_IDENTICAL                                     ~11     !0, !0
         17        SEND_VAL                                                 ~11
         18        DO_ICALL                                                 
   11    19        INIT_FCALL                                               'var_dump'
         20        IS_EQUAL                                         ~13     !0, !1
         21        SEND_VAL                                                 ~13
         22        DO_ICALL                                                 
   12    23        INIT_FCALL                                               'var_dump'
         24        IS_IDENTICAL                                     ~15     !0, !1
         25        SEND_VAL                                                 ~15
         26        DO_ICALL                                                 
         27      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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