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<?php date_default_timezone_set('UTC'); $d = new DateTime('2008-03-01'); $a = new DateTime('2018-03-01'); var_dump($d->diff($a)->y); date_default_timezone_set('Europe/Amsterdam'); $d = new DateTime('2008-03-01'); $a = new DateTime('2018-03-01'); var_dump($d->diff($a)->y);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/DF5QE
function name:  (null)
number of ops:  37
compiled vars:  !0 = $d, !1 = $a
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                                   'date_default_timezone_set'
          1        SEND_VAL                                                     'UTC'
          2        DO_ICALL                                                     
    5     3        NEW                                                  $3      'DateTime'
          4        SEND_VAL_EX                                                  '2008-03-01'
          5        DO_FCALL                                          0          
          6        ASSIGN                                                       !0, $3
    6     7        NEW                                                  $6      'DateTime'
          8        SEND_VAL_EX                                                  '2018-03-01'
          9        DO_FCALL                                          0          
         10        ASSIGN                                                       !1, $6
    8    11        INIT_FCALL                                                   'var_dump'
         12        INIT_METHOD_CALL                                             !0, 'diff'
         13        SEND_VAR_EX                                                  !1
         14        DO_FCALL                                          0  $9      
         15        FETCH_OBJ_R                                          ~10     $9, 'y'
         16        SEND_VAL                                                     ~10
         17        DO_ICALL                                                     
   10    18        INIT_FCALL                                                   'date_default_timezone_set'
         19        SEND_VAL                                                     'Europe%2FAmsterdam'
         20        DO_ICALL                                                     
   12    21        NEW                                                  $13     'DateTime'
         22        SEND_VAL_EX                                                  '2008-03-01'
         23        DO_FCALL                                          0          
         24        ASSIGN                                                       !0, $13
   13    25        NEW                                                  $16     'DateTime'
         26        SEND_VAL_EX                                                  '2018-03-01'
         27        DO_FCALL                                          0          
         28        ASSIGN                                                       !1, $16
   15    29        INIT_FCALL                                                   'var_dump'
         30        INIT_METHOD_CALL                                             !0, 'diff'
         31        SEND_VAR_EX                                                  !1
         32        DO_FCALL                                          0  $19     
         33        FETCH_OBJ_R                                          ~20     $19, 'y'
         34        SEND_VAL                                                     ~20
         35        DO_ICALL                                                     
         36      > RETURN                                                       1

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