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<?php $a = [NAN]; $b = $a; var_dump($a === $b); $a = [NAN]; $b = [NAN]; var_dump($a === $b);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/CVGBt
function name:  (null)
number of ops:  13
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, !0
    5     2        INIT_FCALL                                               'var_dump'
          3        IS_IDENTICAL                                     ~4      !0, !1
          4        SEND_VAL                                                 ~4
          5        DO_ICALL                                                 
    7     6        ASSIGN                                                   !0, <array>
    8     7        ASSIGN                                                   !1, <array>
    9     8        INIT_FCALL                                               'var_dump'
          9        IS_IDENTICAL                                     ~8      !0, !1
         10        SEND_VAL                                                 ~8
         11        DO_ICALL                                                 
         12      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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