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<?php $a = new DateInterval('P2Y4DT6H8M'); //manually, not from DateTime::diff() var_dump($a); // $a->days === false var_dump($a->days); // $a->days === -99999 ?! var_dump($a === false); // false
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/2jrv5
function name:  (null)
number of ops:  16
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   NEW                                              $1      'DateInterval'
          1        SEND_VAL_EX                                              'P2Y4DT6H8M'
          2        DO_FCALL                                      0          
          3        ASSIGN                                                   !0, $1
    3     4        INIT_FCALL                                               'var_dump'
          5        SEND_VAR                                                 !0
          6        DO_ICALL                                                 
    4     7        INIT_FCALL                                               'var_dump'
          8        FETCH_OBJ_R                                      ~5      !0, 'days'
          9        SEND_VAL                                                 ~5
         10        DO_ICALL                                                 
    5    11        INIT_FCALL                                               'var_dump'
         12        TYPE_CHECK                                    4  ~7      !0
         13        SEND_VAL                                                 ~7
         14        DO_ICALL                                                 
         15      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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