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<?php $interval = new DateInterval('P1D'); $dt = new DateTime('first day of January 2011'); var_dump($dt); $dt->add($interval); var_dump($dt); $dt = new DateTime('first day of January 2011'); $dt->sub($interval); var_dump($dt);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/KtXhA
function name:  (null)
number of ops:  28
compiled vars:  !0 = $interval, !1 = $dt
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   NEW                                              $2      'DateInterval'
          1        SEND_VAL_EX                                              'P1D'
          2        DO_FCALL                                      0          
          3        ASSIGN                                                   !0, $2
    4     4        NEW                                              $5      'DateTime'
          5        SEND_VAL_EX                                              'first+day+of+January+2011'
          6        DO_FCALL                                      0          
          7        ASSIGN                                                   !1, $5
    5     8        INIT_FCALL                                               'var_dump'
          9        SEND_VAR                                                 !1
         10        DO_ICALL                                                 
    7    11        INIT_METHOD_CALL                                         !1, 'add'
         12        SEND_VAR_EX                                              !0
         13        DO_FCALL                                      0          
    8    14        INIT_FCALL                                               'var_dump'
         15        SEND_VAR                                                 !1
         16        DO_ICALL                                                 
   10    17        NEW                                              $11     'DateTime'
         18        SEND_VAL_EX                                              'first+day+of+January+2011'
         19        DO_FCALL                                      0          
         20        ASSIGN                                                   !1, $11
   12    21        INIT_METHOD_CALL                                         !1, 'sub'
         22        SEND_VAR_EX                                              !0
         23        DO_FCALL                                      0          
   13    24        INIT_FCALL                                               'var_dump'
         25        SEND_VAR                                                 !1
         26        DO_ICALL                                                 
         27      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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