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<?php $date = new DateTime(); $dateImmutable = new DateTimeImmutable(); var_dump($date instanceof DateTime); var_dump($date instanceof DateTimeInterface); var_dump($date instanceof DateTimeImmutable); var_dump($dateImmutable instanceof DateTime); var_dump($dateImmutable instanceof DateTimeInterface); var_dump($dateImmutable instanceof DateTimeImmutable);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/3guHQ
function name:  (null)
number of ops:  31
compiled vars:  !0 = $date, !1 = $dateImmutable
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   NEW                                              $2      'DateTime'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $2
    5     3        NEW                                              $5      'DateTimeImmutable'
          4        DO_FCALL                                      0          
          5        ASSIGN                                                   !1, $5
    7     6        INIT_FCALL                                               'var_dump'
          7        INSTANCEOF                                       ~8      !0, 'DateTime'
          8        SEND_VAL                                                 ~8
          9        DO_ICALL                                                 
    8    10        INIT_FCALL                                               'var_dump'
         11        INSTANCEOF                                       ~10     !0, 'DateTimeInterface'
         12        SEND_VAL                                                 ~10
         13        DO_ICALL                                                 
    9    14        INIT_FCALL                                               'var_dump'
         15        INSTANCEOF                                       ~12     !0, 'DateTimeImmutable'
         16        SEND_VAL                                                 ~12
         17        DO_ICALL                                                 
   11    18        INIT_FCALL                                               'var_dump'
         19        INSTANCEOF                                       ~14     !1, 'DateTime'
         20        SEND_VAL                                                 ~14
         21        DO_ICALL                                                 
   12    22        INIT_FCALL                                               'var_dump'
         23        INSTANCEOF                                       ~16     !1, 'DateTimeInterface'
         24        SEND_VAL                                                 ~16
         25        DO_ICALL                                                 
   13    26        INIT_FCALL                                               'var_dump'
         27        INSTANCEOF                                       ~18     !1, 'DateTimeImmutable'
         28        SEND_VAL                                                 ~18
         29        DO_ICALL                                                 
         30      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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