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<?php // Works $date = new DateTime('2013-12-27', new DateTimeZone('GMT')); var_dump($date); var_dump($date->modify('+1 day')); // Doesn't work $date = new DateTime('2013-12-27', new DateTimeZone('GMT')); var_dump($date); var_dump($date->modify('-1 weekday'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/NLoiE
function name:  (null)
number of ops:  35
compiled vars:  !0 = $date
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   NEW                                              $1      'DateTime'
          1        SEND_VAL_EX                                              '2013-12-27'
          2        NEW                                              $2      'DateTimeZone'
          3        SEND_VAL_EX                                              'GMT'
          4        DO_FCALL                                      0          
          5        SEND_VAR_NO_REF_EX                                       $2
          6        DO_FCALL                                      0          
          7        ASSIGN                                                   !0, $1
    6     8        INIT_FCALL                                               'var_dump'
          9        SEND_VAR                                                 !0
         10        DO_ICALL                                                 
    7    11        INIT_FCALL                                               'var_dump'
         12        INIT_METHOD_CALL                                         !0, 'modify'
         13        SEND_VAL_EX                                              '%2B1+day'
         14        DO_FCALL                                      0  $7      
         15        SEND_VAR                                                 $7
         16        DO_ICALL                                                 
   10    17        NEW                                              $9      'DateTime'
         18        SEND_VAL_EX                                              '2013-12-27'
         19        NEW                                              $10     'DateTimeZone'
         20        SEND_VAL_EX                                              'GMT'
         21        DO_FCALL                                      0          
         22        SEND_VAR_NO_REF_EX                                       $10
         23        DO_FCALL                                      0          
         24        ASSIGN                                                   !0, $9
   12    25        INIT_FCALL                                               'var_dump'
         26        SEND_VAR                                                 !0
         27        DO_ICALL                                                 
   13    28        INIT_FCALL                                               'var_dump'
         29        INIT_METHOD_CALL                                         !0, 'modify'
         30        SEND_VAL_EX                                              '-1+weekday'
         31        DO_FCALL                                      0  $15     
         32        SEND_VAR                                                 $15
         33        DO_ICALL                                                 
         34      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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