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<?php $start = DateTime::createFromFormat('U', 1347577200); $end = DateTime::createFromFormat('U', 1347580800); $diff = $start->diff($end); print 'Diff: '.$diff->h.' hours, '.$diff->i.' minutes'; $interval = DateInterval::createFromDateString('30 minutes'); print_p($interval); $end->add($interval); $diff = $start->diff($end); print '<br>Diff after interval: '.$diff->h.' hours, '.$diff->i.' minutes'; ?>
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/9T2K1
function name:  (null)
number of ops:  43
compiled vars:  !0 = $start, !1 = $end, !2 = $diff, !3 = $interval
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_STATIC_METHOD_CALL                                  'DateTime', 'createFromFormat'
          1        SEND_VAL                                                 'U'
          2        SEND_VAL                                                 1347577200
          3        DO_FCALL                                      0  $4      
          4        ASSIGN                                                   !0, $4
    3     5        INIT_STATIC_METHOD_CALL                                  'DateTime', 'createFromFormat'
          6        SEND_VAL                                                 'U'
          7        SEND_VAL                                                 1347580800
          8        DO_FCALL                                      0  $6      
          9        ASSIGN                                                   !1, $6
    5    10        INIT_METHOD_CALL                                         !0, 'diff'
         11        SEND_VAR_EX                                              !1
         12        DO_FCALL                                      0  $8      
         13        ASSIGN                                                   !2, $8
    6    14        FETCH_OBJ_R                                      ~10     !2, 'h'
         15        CONCAT                                           ~11     'Diff%3A+', ~10
         16        CONCAT                                           ~12     ~11, '+hours%2C+'
         17        FETCH_OBJ_R                                      ~13     !2, 'i'
         18        CONCAT                                           ~14     ~12, ~13
         19        CONCAT                                           ~15     ~14, '+minutes'
         20        ECHO                                                     ~15
    9    21        INIT_STATIC_METHOD_CALL                                  'DateInterval', 'createFromDateString'
         22        SEND_VAL                                                 '30+minutes'
         23        DO_FCALL                                      0  $16     
         24        ASSIGN                                                   !3, $16
   10    25        INIT_FCALL_BY_NAME                                       'print_p'
         26        SEND_VAR_EX                                              !3
         27        DO_FCALL                                      0          
   12    28        INIT_METHOD_CALL                                         !1, 'add'
         29        SEND_VAR_EX                                              !3
         30        DO_FCALL                                      0          
   13    31        INIT_METHOD_CALL                                         !0, 'diff'
         32        SEND_VAR_EX                                              !1
         33        DO_FCALL                                      0  $20     
         34        ASSIGN                                                   !2, $20
   14    35        FETCH_OBJ_R                                      ~22     !2, 'h'
         36        CONCAT                                           ~23     '%3Cbr%3EDiff+after+interval%3A+', ~22
         37        CONCAT                                           ~24     ~23, '+hours%2C+'
         38        FETCH_OBJ_R                                      ~25     !2, 'i'
         39        CONCAT                                           ~26     ~24, ~25
         40        CONCAT                                           ~27     ~26, '+minutes'
         41        ECHO                                                     ~27
   15    42      > RETURN                                                   1

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