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<?php $distance = -10; $dt = new DateTimeImmutable('2024-03-21 12:00:00'); var_dump($dt->modify("-{$distance} hours")); var_dump($dt->modify((-$distance) . " hours"));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/X1XJd
function name:  (null)
number of ops:  23
compiled vars:  !0 = $distance, !1 = $dt
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, -10
    4     1        NEW                                              $3      'DateTimeImmutable'
          2        SEND_VAL_EX                                              '2024-03-21+12%3A00%3A00'
          3        DO_FCALL                                      0          
          4        ASSIGN                                                   !1, $3
    6     5        INIT_FCALL                                               'var_dump'
          6        INIT_METHOD_CALL                                         !1, 'modify'
          7        ROPE_INIT                                     3  ~7      '-'
          8        ROPE_ADD                                      1  ~7      ~7, !0
          9        ROPE_END                                      2  ~6      ~7, '+hours'
         10        SEND_VAL_EX                                              ~6
         11        DO_FCALL                                      0  $9      
         12        SEND_VAR                                                 $9
         13        DO_ICALL                                                 
    7    14        INIT_FCALL                                               'var_dump'
         15        INIT_METHOD_CALL                                         !1, 'modify'
         16        MUL                                              ~11     !0, -1
         17        CONCAT                                           ~12     ~11, '+hours'
         18        SEND_VAL_EX                                              ~12
         19        DO_FCALL                                      0  $13     
         20        SEND_VAR                                                 $13
         21        DO_ICALL                                                 
         22      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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