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<?php $daysInMonth = array(0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); $timestampFailing = false; for ($year = 1500; $year < 2000; $year++) { for ($month = 1; $month <= 12; $month++) { for ($day = 1; $day < $daysInMonth[$month]; $day++) { $baseString = sprintf("%4d-%02d-%02d 00:00:00", $year, $month, $day); $timestamp = strtotime($baseString); if (!$timestamp) { $timestampFailing = true; echo "Timestamp failing start at $baseString\n"; continue; } if ($timestampFailing && $timestamp) { $timestampFailing = false; echo "Timestamp failinng end at $baseString\n"; } $roundTrip = date("Y-m-d H:i:s", $timestamp); if ($baseString !== $roundTrip) { echo "$baseString ($timestamp) $roundTrip\n"; } } } }
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 57
Branch analysis from position: 57
2 jumps found. (Code = 44) Position 1 = 59, Position 2 = 4
Branch analysis from position: 59
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 4
1 jumps found. (Code = 42) Position 1 = 54
Branch analysis from position: 54
2 jumps found. (Code = 44) Position 1 = 56, Position 2 = 6
Branch analysis from position: 56
2 jumps found. (Code = 44) Position 1 = 59, Position 2 = 4
Branch analysis from position: 59
Branch analysis from position: 4
Branch analysis from position: 6
1 jumps found. (Code = 42) Position 1 = 50
Branch analysis from position: 50
2 jumps found. (Code = 44) Position 1 = 53, Position 2 = 8
Branch analysis from position: 53
2 jumps found. (Code = 44) Position 1 = 56, Position 2 = 6
Branch analysis from position: 56
Branch analysis from position: 6
Branch analysis from position: 8
2 jumps found. (Code = 43) Position 1 = 21, Position 2 = 27
Branch analysis from position: 21
1 jumps found. (Code = 42) Position 1 = 49
Branch analysis from position: 49
2 jumps found. (Code = 44) Position 1 = 53, Position 2 = 8
Branch analysis from position: 53
Branch analysis from position: 8
Branch analysis from position: 27
2 jumps found. (Code = 46) Position 1 = 28, Position 2 = 29
Branch analysis from position: 28
2 jumps found. (Code = 43) Position 1 = 30, Position 2 = 35
Branch analysis from position: 30
2 jumps found. (Code = 43) Position 1 = 42, Position 2 = 49
Branch analysis from position: 42
2 jumps found. (Code = 44) Position 1 = 53, Position 2 = 8
Branch analysis from position: 53
Branch analysis from position: 8
Branch analysis from position: 49
Branch analysis from position: 35
Branch analysis from position: 29
filename:       /in/nGH6a
function name:  (null)
number of ops:  60
compiled vars:  !0 = $daysInMonth, !1 = $timestampFailing, !2 = $year, !3 = $month, !4 = $day, !5 = $baseString, !6 = $timestamp, !7 = $roundTrip
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    4     1        ASSIGN                                                   !1, <false>
    5     2        ASSIGN                                                   !2, 1500
          3      > JMP                                                      ->57
    6     4    >   ASSIGN                                                   !3, 1
          5      > JMP                                                      ->54
    7     6    >   ASSIGN                                                   !4, 1
          7      > JMP                                                      ->50
    8     8    >   INIT_FCALL                                               'sprintf'
          9        SEND_VAL                                                 '%254d-%2502d-%2502d+00%3A00%3A00'
         10        SEND_VAR                                                 !2
         11        SEND_VAR                                                 !3
         12        SEND_VAR                                                 !4
         13        DO_ICALL                                         $13     
         14        ASSIGN                                                   !5, $13
    9    15        INIT_FCALL                                               'strtotime'
         16        SEND_VAR                                                 !5
         17        DO_ICALL                                         $15     
         18        ASSIGN                                                   !6, $15
   10    19        BOOL_NOT                                         ~17     !6
         20      > JMPZ                                                     ~17, ->27
   11    21    >   ASSIGN                                                   !1, <true>
   12    22        ROPE_INIT                                     3  ~20     'Timestamp+failing+start+at+'
         23        ROPE_ADD                                      1  ~20     ~20, !5
         24        ROPE_END                                      2  ~19     ~20, '%0A'
         25        ECHO                                                     ~19
   13    26      > JMP                                                      ->49
   15    27    > > JMPZ_EX                                          ~22     !1, ->29
         28    >   BOOL                                             ~22     !6
         29    > > JMPZ                                                     ~22, ->35
   16    30    >   ASSIGN                                                   !1, <false>
   17    31        ROPE_INIT                                     3  ~25     'Timestamp+failinng+end+at+'
         32        ROPE_ADD                                      1  ~25     ~25, !5
         33        ROPE_END                                      2  ~24     ~25, '%0A'
         34        ECHO                                                     ~24
   19    35    >   INIT_FCALL                                               'date'
         36        SEND_VAL                                                 'Y-m-d+H%3Ai%3As'
         37        SEND_VAR                                                 !6
         38        DO_ICALL                                         $27     
         39        ASSIGN                                                   !7, $27
   20    40        IS_NOT_IDENTICAL                                         !5, !7
         41      > JMPZ                                                     ~29, ->49
   21    42    >   ROPE_INIT                                     6  ~31     !5
         43        ROPE_ADD                                      1  ~31     ~31, '+%28'
         44        ROPE_ADD                                      2  ~31     ~31, !6
         45        ROPE_ADD                                      3  ~31     ~31, '%29+'
         46        ROPE_ADD                                      4  ~31     ~31, !7
         47        ROPE_END                                      5  ~30     ~31, '%0A'
         48        ECHO                                                     ~30
    7    49    >   PRE_INC                                                  !4
         50    >   FETCH_DIM_R                                      ~35     !0, !3
         51        IS_SMALLER                                               !4, ~35
         52      > JMPNZ                                                    ~36, ->8
    6    53    >   PRE_INC                                                  !3
         54    >   IS_SMALLER_OR_EQUAL                                      !3, 12
         55      > JMPNZ                                                    ~38, ->6
    5    56    >   PRE_INC                                                  !2
         57    >   IS_SMALLER                                               !2, 2000
         58      > JMPNZ                                                    ~40, ->4
   26    59    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
151.88 ms | 1392 KiB | 19 Q