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<?php $base = 1509224400; // 2017-10-28 22:00:00 BST $intervalMins = 720; $utc = new \DateTimeZone('UTC'); $europeLondon = new \DateTimeZone('Europe/London'); // create datetime from timestamp $base = (new \DateTimeImmutable('@' . $base))->setTimeZone($utc); echo 'UTC modified: ' . $base->modify('+' . $intervalMins . ' minutes')->format('U Y-m-d H:i:s') . "\n"; echo 'Local modified: ' . $base->setTimezone($europeLondon)->modify('+' . $intervalMins . ' minutes')->format('U Y-m-d H:i:s') . "\n";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/eKDNc
function name:  (null)
number of ops:  44
compiled vars:  !0 = $base, !1 = $intervalMins, !2 = $utc, !3 = $europeLondon
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 1509224400
    4     1        ASSIGN                                                   !1, 720
    6     2        NEW                                              $6      'DateTimeZone'
          3        SEND_VAL_EX                                              'UTC'
          4        DO_FCALL                                      0          
          5        ASSIGN                                                   !2, $6
    7     6        NEW                                              $9      'DateTimeZone'
          7        SEND_VAL_EX                                              'Europe%2FLondon'
          8        DO_FCALL                                      0          
          9        ASSIGN                                                   !3, $9
   10    10        NEW                                              $12     'DateTimeImmutable'
         11        CONCAT                                           ~13     '%40', !0
         12        SEND_VAL_EX                                              ~13
         13        DO_FCALL                                      0          
         14        INIT_METHOD_CALL                                         $12, 'setTimeZone'
         15        SEND_VAR_EX                                              !2
         16        DO_FCALL                                      0  $15     
         17        ASSIGN                                                   !0, $15
   12    18        INIT_METHOD_CALL                                         !0, 'modify'
         19        CONCAT                                           ~17     '%2B', !1
         20        CONCAT                                           ~18     ~17, '+minutes'
         21        SEND_VAL_EX                                              ~18
         22        DO_FCALL                                      0  $19     
         23        INIT_METHOD_CALL                                         $19, 'format'
         24        SEND_VAL_EX                                              'U+Y-m-d+H%3Ai%3As'
         25        DO_FCALL                                      0  $20     
         26        CONCAT                                           ~21     'UTC+modified%3A+', $20
         27        CONCAT                                           ~22     ~21, '%0A'
         28        ECHO                                                     ~22
   13    29        INIT_METHOD_CALL                                         !0, 'setTimezone'
         30        SEND_VAR_EX                                              !3
         31        DO_FCALL                                      0  $23     
         32        INIT_METHOD_CALL                                         $23, 'modify'
         33        CONCAT                                           ~24     '%2B', !1
         34        CONCAT                                           ~25     ~24, '+minutes'
         35        SEND_VAL_EX                                              ~25
         36        DO_FCALL                                      0  $26     
         37        INIT_METHOD_CALL                                         $26, 'format'
         38        SEND_VAL_EX                                              'U+Y-m-d+H%3Ai%3As'
         39        DO_FCALL                                      0  $27     
         40        CONCAT                                           ~28     'Local+modified%3A+', $27
         41        CONCAT                                           ~29     ~28, '%0A'
         42        ECHO                                                     ~29
         43      > RETURN                                                   1

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