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<?php $date = new DateTime('2011-03-01'); var_dump($date->format('Y-m-d')); $date->add(new DateInterval('P1Y')); var_dump($date->format('Y-m-d')); $date2 = new DateTime('2012-2-29'); var_dump($date2->format('Y-m-d')); $date2->add(new DateInterval('P1Y')); var_dump($date2->format('Y-m-d')); $date3 = new DateTime('2013-03-01'); var_dump($date3->format('Y-m-d')); $date3->add(new DateInterval('P1Y')); var_dump($date3->format('Y-m-d'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/npanb
function name:  (null)
number of ops:  67
compiled vars:  !0 = $date, !1 = $date2, !2 = $date3
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   NEW                                              $3      'DateTime'
          1        SEND_VAL_EX                                              '2011-03-01'
          2        DO_FCALL                                      0          
          3        ASSIGN                                                   !0, $3
    4     4        INIT_FCALL                                               'var_dump'
          5        INIT_METHOD_CALL                                         !0, 'format'
          6        SEND_VAL_EX                                              'Y-m-d'
          7        DO_FCALL                                      0  $6      
          8        SEND_VAR                                                 $6
          9        DO_ICALL                                                 
    6    10        INIT_METHOD_CALL                                         !0, 'add'
         11        NEW                                              $8      'DateInterval'
         12        SEND_VAL_EX                                              'P1Y'
         13        DO_FCALL                                      0          
         14        SEND_VAR_NO_REF_EX                                       $8
         15        DO_FCALL                                      0          
    7    16        INIT_FCALL                                               'var_dump'
         17        INIT_METHOD_CALL                                         !0, 'format'
         18        SEND_VAL_EX                                              'Y-m-d'
         19        DO_FCALL                                      0  $11     
         20        SEND_VAR                                                 $11
         21        DO_ICALL                                                 
    9    22        NEW                                              $13     'DateTime'
         23        SEND_VAL_EX                                              '2012-2-29'
         24        DO_FCALL                                      0          
         25        ASSIGN                                                   !1, $13
   10    26        INIT_FCALL                                               'var_dump'
         27        INIT_METHOD_CALL                                         !1, 'format'
         28        SEND_VAL_EX                                              'Y-m-d'
         29        DO_FCALL                                      0  $16     
         30        SEND_VAR                                                 $16
         31        DO_ICALL                                                 
   12    32        INIT_METHOD_CALL                                         !1, 'add'
         33        NEW                                              $18     'DateInterval'
         34        SEND_VAL_EX                                              'P1Y'
         35        DO_FCALL                                      0          
         36        SEND_VAR_NO_REF_EX                                       $18
         37        DO_FCALL                                      0          
   13    38        INIT_FCALL                                               'var_dump'
         39        INIT_METHOD_CALL                                         !1, 'format'
         40        SEND_VAL_EX                                              'Y-m-d'
         41        DO_FCALL                                      0  $21     
         42        SEND_VAR                                                 $21
         43        DO_ICALL                                                 
   15    44        NEW                                              $23     'DateTime'
         45        SEND_VAL_EX                                              '2013-03-01'
         46        DO_FCALL                                      0          
         47        ASSIGN                                                   !2, $23
   16    48        INIT_FCALL                                               'var_dump'
         49        INIT_METHOD_CALL                                         !2, 'format'
         50        SEND_VAL_EX                                              'Y-m-d'
         51        DO_FCALL                                      0  $26     
         52        SEND_VAR                                                 $26
         53        DO_ICALL                                                 
   18    54        INIT_METHOD_CALL                                         !2, 'add'
         55        NEW                                              $28     'DateInterval'
         56        SEND_VAL_EX                                              'P1Y'
         57        DO_FCALL                                      0          
         58        SEND_VAR_NO_REF_EX                                       $28
         59        DO_FCALL                                      0          
   19    60        INIT_FCALL                                               'var_dump'
         61        INIT_METHOD_CALL                                         !2, 'format'
         62        SEND_VAL_EX                                              'Y-m-d'
         63        DO_FCALL                                      0  $31     
         64        SEND_VAR                                                 $31
         65        DO_ICALL                                                 
         66      > RETURN                                                   1

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