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<?php $date_x = new DateTime('2000-01-0x10'); $date_y = new DateTime('1999-12-31'); $date_z = new DateTime('1999-12-31'); var_dump($date_y == $date_z); var_dump($date_x == $date_y); var_dump('with x', $date_x->format('Y-m-d H:i:sP')); var_dump(' no x', $date_y->format('Y-m-d H:i:sP')); var_dump($date_x); var_dump($date_y);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/VVkVM
function name:  (null)
number of ops:  41
compiled vars:  !0 = $date_x, !1 = $date_y, !2 = $date_z
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   NEW                                              $3      'DateTime'
          1        SEND_VAL_EX                                              '2000-01-0x10'
          2        DO_FCALL                                      0          
          3        ASSIGN                                                   !0, $3
    4     4        NEW                                              $6      'DateTime'
          5        SEND_VAL_EX                                              '1999-12-31'
          6        DO_FCALL                                      0          
          7        ASSIGN                                                   !1, $6
    5     8        NEW                                              $9      'DateTime'
          9        SEND_VAL_EX                                              '1999-12-31'
         10        DO_FCALL                                      0          
         11        ASSIGN                                                   !2, $9
    7    12        INIT_FCALL                                               'var_dump'
         13        IS_EQUAL                                         ~12     !1, !2
         14        SEND_VAL                                                 ~12
         15        DO_ICALL                                                 
    8    16        INIT_FCALL                                               'var_dump'
         17        IS_EQUAL                                         ~14     !0, !1
         18        SEND_VAL                                                 ~14
         19        DO_ICALL                                                 
   10    20        INIT_FCALL                                               'var_dump'
         21        SEND_VAL                                                 'with+x'
         22        INIT_METHOD_CALL                                         !0, 'format'
         23        SEND_VAL_EX                                              'Y-m-d+H%3Ai%3AsP'
         24        DO_FCALL                                      0  $16     
         25        SEND_VAR                                                 $16
         26        DO_ICALL                                                 
   11    27        INIT_FCALL                                               'var_dump'
         28        SEND_VAL                                                 '++no+x'
         29        INIT_METHOD_CALL                                         !1, 'format'
         30        SEND_VAL_EX                                              'Y-m-d+H%3Ai%3AsP'
         31        DO_FCALL                                      0  $18     
         32        SEND_VAR                                                 $18
         33        DO_ICALL                                                 
   13    34        INIT_FCALL                                               'var_dump'
         35        SEND_VAR                                                 !0
         36        DO_ICALL                                                 
   14    37        INIT_FCALL                                               'var_dump'
         38        SEND_VAR                                                 !1
         39        DO_ICALL                                                 
         40      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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