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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 8.5.0


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