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<?php $winter = new DateTime('2012-12-21', new DateTimeZone('Europe/Moscow')); $summer = new DateTime('2012-04-21', new DateTimeZone('Europe/Moscow')); $tz['winter']= ($winter->getOffset())/60/60; $tz['summer']= ($summer->getOffset())/60/60; $tz['diff']=$tz['summer']-$tz['winter']; echo $tz['diff'];
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/HHeKk
function name:  (null)
number of ops:  36
compiled vars:  !0 = $winter, !1 = $summer, !2 = $tz
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   NEW                                              $3      'DateTime'
          1        SEND_VAL_EX                                              '2012-12-21'
          2        NEW                                              $4      'DateTimeZone'
          3        SEND_VAL_EX                                              'Europe%2FMoscow'
          4        DO_FCALL                                      0          
          5        SEND_VAR_NO_REF_EX                                       $4
          6        DO_FCALL                                      0          
          7        ASSIGN                                                   !0, $3
    4     8        NEW                                              $8      'DateTime'
          9        SEND_VAL_EX                                              '2012-04-21'
         10        NEW                                              $9      'DateTimeZone'
         11        SEND_VAL_EX                                              'Europe%2FMoscow'
         12        DO_FCALL                                      0          
         13        SEND_VAR_NO_REF_EX                                       $9
         14        DO_FCALL                                      0          
         15        ASSIGN                                                   !1, $8
    6    16        INIT_METHOD_CALL                                         !0, 'getOffset'
         17        DO_FCALL                                      0  $14     
         18        DIV                                              ~15     $14, 60
         19        DIV                                              ~16     ~15, 60
         20        ASSIGN_DIM                                               !2, 'winter'
         21        OP_DATA                                                  ~16
    7    22        INIT_METHOD_CALL                                         !1, 'getOffset'
         23        DO_FCALL                                      0  $18     
         24        DIV                                              ~19     $18, 60
         25        DIV                                              ~20     ~19, 60
         26        ASSIGN_DIM                                               !2, 'summer'
         27        OP_DATA                                                  ~20
    8    28        FETCH_DIM_R                                      ~22     !2, 'summer'
         29        FETCH_DIM_R                                      ~23     !2, 'winter'
         30        SUB                                              ~24     ~22, ~23
         31        ASSIGN_DIM                                               !2, 'diff'
         32        OP_DATA                                                  ~24
    9    33        FETCH_DIM_R                                      ~25     !2, 'diff'
         34        ECHO                                                     ~25
         35      > RETURN                                                   1

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