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<?php if (class_exists('DateTime') && class_exists('DateInterval')) { $d = new DateTime('2014W02'); echo $d->sub(new DateInterval('P1W'))->format('r'), PHP_EOL; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 46) Position 1 = 4, Position 2 = 8
Branch analysis from position: 4
2 jumps found. (Code = 43) Position 1 = 9, Position 2 = 24
Branch analysis from position: 9
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 24
Branch analysis from position: 8
filename:       /in/kMZqF
function name:  (null)
number of ops:  25
compiled vars:  !0 = $d
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'class_exists'
          1        SEND_VAL                                                 'DateTime'
          2        DO_ICALL                                         $1      
          3      > JMPZ_EX                                          ~2      $1, ->8
          4    >   INIT_FCALL                                               'class_exists'
          5        SEND_VAL                                                 'DateInterval'
          6        DO_ICALL                                         $3      
          7        BOOL                                             ~2      $3
          8    > > JMPZ                                                     ~2, ->24
    4     9    >   NEW                                              $4      'DateTime'
         10        SEND_VAL_EX                                              '2014W02'
         11        DO_FCALL                                      0          
         12        ASSIGN                                                   !0, $4
    5    13        INIT_METHOD_CALL                                         !0, 'sub'
         14        NEW                                              $7      'DateInterval'
         15        SEND_VAL_EX                                              'P1W'
         16        DO_FCALL                                      0          
         17        SEND_VAR_NO_REF_EX                                       $7
         18        DO_FCALL                                      0  $9      
         19        INIT_METHOD_CALL                                         $9, 'format'
         20        SEND_VAL_EX                                              'r'
         21        DO_FCALL                                      0  $10     
         22        ECHO                                                     $10
         23        ECHO                                                     '%0A'
    6    24    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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