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<?php date_default_timezone_set("Europe/London"); $dt = new DateTimeImmutable("2021-03-28T02:00"); var_dump( $dt->format("c"), $dt->modify('-1 hour')->format("c") );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/XWdf2
function name:  (null)
number of ops:  21
compiled vars:  !0 = $dt
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                                   'date_default_timezone_set'
          1        SEND_VAL                                                     'Europe%2FLondon'
          2        DO_ICALL                                                     
    4     3        NEW                                                  $2      'DateTimeImmutable'
          4        SEND_VAL_EX                                                  '2021-03-28T02%3A00'
          5        DO_FCALL                                          0          
          6        ASSIGN                                                       !0, $2
    5     7        INIT_FCALL                                                   'var_dump'
    6     8        INIT_METHOD_CALL                                             !0, 'format'
          9        SEND_VAL_EX                                                  'c'
         10        DO_FCALL                                          0  $5      
         11        SEND_VAR                                                     $5
    7    12        INIT_METHOD_CALL                                             !0, 'modify'
         13        SEND_VAL_EX                                                  '-1+hour'
         14        DO_FCALL                                          0  $6      
         15        INIT_METHOD_CALL                                             $6, 'format'
         16        SEND_VAL_EX                                                  'c'
         17        DO_FCALL                                          0  $7      
         18        SEND_VAR                                                     $7
    5    19        DO_ICALL                                                     
    8    20      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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