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<?php function buildDatetime($time, $now, $zone) { $datetime = new \DateTime(); $datetime->setTimestamp(strtotime($time, $now)); $datetime->setTimezone(new DateTimezone($zone)); return $datetime; } $now = new \DateTime('2000-01-02 00:00:00', new \DateTimeZone('UTC')); date_default_timezone_set('America/Los_Angeles'); $date = buildDatetime('yesterday', $now->getTimestamp(), 'UTC'); var_dump($date->format('c'), $date->getTimezone()->getName());
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/aZ9uN
function name:  (null)
number of ops:  31
compiled vars:  !0 = $now, !1 = $date
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   11     0  E >   NEW                                              $2      'DateTime'
          1        SEND_VAL_EX                                              '2000-01-02+00%3A00%3A00'
          2        NEW                                              $3      'DateTimeZone'
          3        SEND_VAL_EX                                              'UTC'
          4        DO_FCALL                                      0          
          5        SEND_VAR_NO_REF_EX                                       $3
          6        DO_FCALL                                      0          
          7        ASSIGN                                                   !0, $2
   13     8        INIT_FCALL                                               'date_default_timezone_set'
          9        SEND_VAL                                                 'America%2FLos_Angeles'
         10        DO_ICALL                                                 
   15    11        INIT_FCALL                                               'builddatetime'
         12        SEND_VAL                                                 'yesterday'
         13        INIT_METHOD_CALL                                         !0, 'getTimestamp'
         14        DO_FCALL                                      0  $8      
         15        SEND_VAR                                                 $8
         16        SEND_VAL                                                 'UTC'
         17        DO_FCALL                                      0  $9      
         18        ASSIGN                                                   !1, $9
   16    19        INIT_FCALL                                               'var_dump'
         20        INIT_METHOD_CALL                                         !1, 'format'
         21        SEND_VAL_EX                                              'c'
         22        DO_FCALL                                      0  $11     
         23        SEND_VAR                                                 $11
         24        INIT_METHOD_CALL                                         !1, 'getTimezone'
         25        DO_FCALL                                      0  $12     
         26        INIT_METHOD_CALL                                         $12, 'getName'
         27        DO_FCALL                                      0  $13     
         28        SEND_VAR                                                 $13
         29        DO_ICALL                                                 
         30      > RETURN                                                   1

Function builddatetime:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/aZ9uN
function name:  buildDatetime
number of ops:  21
compiled vars:  !0 = $time, !1 = $now, !2 = $zone, !3 = $datetime
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
          1        RECV                                             !1      
          2        RECV                                             !2      
    5     3        NEW                                              $4      'DateTime'
          4        DO_FCALL                                      0          
          5        ASSIGN                                                   !3, $4
    6     6        INIT_METHOD_CALL                                         !3, 'setTimestamp'
          7        INIT_FCALL                                               'strtotime'
          8        SEND_VAR                                                 !0
          9        SEND_VAR                                                 !1
         10        DO_ICALL                                         $7      
         11        SEND_VAR_NO_REF_EX                                       $7
         12        DO_FCALL                                      0          
    7    13        INIT_METHOD_CALL                                         !3, 'setTimezone'
         14        NEW                                              $9      'DateTimezone'
         15        SEND_VAR_EX                                              !2
         16        DO_FCALL                                      0          
         17        SEND_VAR_NO_REF_EX                                       $9
         18        DO_FCALL                                      0          
    8    19      > RETURN                                                   !3
    9    20*     > RETURN                                                   null

End of function builddatetime

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