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<?php $timestamp = '-1'; $dt = DateTime::createFromFormat('U', $timestamp); var_dump($dt->format('U') === $timestamp);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/mT3CX
function name:  (null)
number of ops:  14
compiled vars:  !0 = $timestamp, !1 = $dt
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '-1'
    4     1        INIT_STATIC_METHOD_CALL                                  'DateTime', 'createFromFormat'
          2        SEND_VAL                                                 'U'
          3        SEND_VAR                                                 !0
          4        DO_FCALL                                      0  $3      
          5        ASSIGN                                                   !1, $3
    5     6        INIT_FCALL                                               'var_dump'
          7        INIT_METHOD_CALL                                         !1, 'format'
          8        SEND_VAL_EX                                              'U'
          9        DO_FCALL                                      0  $5      
         10        IS_IDENTICAL                                     ~6      !0, $5
         11        SEND_VAL                                                 ~6
         12        DO_ICALL                                                 
         13      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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