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<?php $dateMin = new DateTimeImmutable('@'.PHP_INT_MIN); $dateMax = new DateTimeImmutable('@'.PHP_INT_MAX); $interval = new DateInterval('PT1S'); var_dump([ 'min' => $dateMin->format('Y-m-d H:i:s'), 'min -1 second' => $dateMin->sub($interval)->format('Y-m-d H:i:s'), 'max' => $dateMax->format('Y-m-d H:i:s'), 'max +1 second' => $dateMax->add($interval)->format('Y-m-d H:i:s'), ]);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/VLl5S
function name:  (null)
number of ops:  38
compiled vars:  !0 = $dateMin, !1 = $dateMax, !2 = $interval
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   NEW                                              $3      'DateTimeImmutable'
          1        SEND_VAL_EX                                              '%40-9223372036854775808'
          2        DO_FCALL                                      0          
          3        ASSIGN                                                   !0, $3
    4     4        NEW                                              $6      'DateTimeImmutable'
          5        SEND_VAL_EX                                              '%409223372036854775807'
          6        DO_FCALL                                      0          
          7        ASSIGN                                                   !1, $6
    5     8        NEW                                              $9      'DateInterval'
          9        SEND_VAL_EX                                              'PT1S'
         10        DO_FCALL                                      0          
         11        ASSIGN                                                   !2, $9
    6    12        INIT_FCALL                                               'var_dump'
    7    13        INIT_METHOD_CALL                                         !0, 'format'
         14        SEND_VAL_EX                                              'Y-m-d+H%3Ai%3As'
         15        DO_FCALL                                      0  $12     
         16        INIT_ARRAY                                       ~13     $12, 'min'
    8    17        INIT_METHOD_CALL                                         !0, 'sub'
         18        SEND_VAR_EX                                              !2
         19        DO_FCALL                                      0  $14     
         20        INIT_METHOD_CALL                                         $14, 'format'
         21        SEND_VAL_EX                                              'Y-m-d+H%3Ai%3As'
         22        DO_FCALL                                      0  $15     
         23        ADD_ARRAY_ELEMENT                                ~13     $15, 'min+-1+second'
    9    24        INIT_METHOD_CALL                                         !1, 'format'
         25        SEND_VAL_EX                                              'Y-m-d+H%3Ai%3As'
         26        DO_FCALL                                      0  $16     
         27        ADD_ARRAY_ELEMENT                                ~13     $16, 'max'
   10    28        INIT_METHOD_CALL                                         !1, 'add'
         29        SEND_VAR_EX                                              !2
         30        DO_FCALL                                      0  $17     
         31        INIT_METHOD_CALL                                         $17, 'format'
         32        SEND_VAL_EX                                              'Y-m-d+H%3Ai%3As'
         33        DO_FCALL                                      0  $18     
         34        ADD_ARRAY_ELEMENT                                ~13     $18, 'max+%2B1+second'
         35        SEND_VAL                                                 ~13
         36        DO_ICALL                                                 
   11    37      > RETURN                                                   1

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