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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); // Currently failing, ignore if (!$timestamp && $timestampFailing) { continue; } // Newly failed: log and continue if (!$timestamp) { $timestampFailing = true; echo "Timestamp failing start at $baseString\n"; continue; } // Stopped failing: log and continue if ($timestampFailing && $timestamp) { $timestampFailing = false; echo "Timestamp failinng end at $baseString\n"; } // Failed round trip. $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 = 62
Branch analysis from position: 62
2 jumps found. (Code = 44) Position 1 = 64, Position 2 = 4
Branch analysis from position: 64
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 4
1 jumps found. (Code = 42) Position 1 = 59
Branch analysis from position: 59
2 jumps found. (Code = 44) Position 1 = 61, Position 2 = 6
Branch analysis from position: 61
2 jumps found. (Code = 44) Position 1 = 64, Position 2 = 4
Branch analysis from position: 64
Branch analysis from position: 4
Branch analysis from position: 6
1 jumps found. (Code = 42) Position 1 = 55
Branch analysis from position: 55
2 jumps found. (Code = 44) Position 1 = 58, Position 2 = 8
Branch analysis from position: 58
2 jumps found. (Code = 44) Position 1 = 61, Position 2 = 6
Branch analysis from position: 61
Branch analysis from position: 6
Branch analysis from position: 8
2 jumps found. (Code = 46) Position 1 = 21, Position 2 = 22
Branch analysis from position: 21
2 jumps found. (Code = 43) Position 1 = 23, Position 2 = 24
Branch analysis from position: 23
1 jumps found. (Code = 42) Position 1 = 54
Branch analysis from position: 54
2 jumps found. (Code = 44) Position 1 = 58, Position 2 = 8
Branch analysis from position: 58
Branch analysis from position: 8
Branch analysis from position: 24
2 jumps found. (Code = 43) Position 1 = 26, Position 2 = 32
Branch analysis from position: 26
1 jumps found. (Code = 42) Position 1 = 54
Branch analysis from position: 54
Branch analysis from position: 32
2 jumps found. (Code = 46) Position 1 = 33, Position 2 = 34
Branch analysis from position: 33
2 jumps found. (Code = 43) Position 1 = 35, Position 2 = 40
Branch analysis from position: 35
2 jumps found. (Code = 43) Position 1 = 47, Position 2 = 54
Branch analysis from position: 47
2 jumps found. (Code = 44) Position 1 = 58, Position 2 = 8
Branch analysis from position: 58
Branch analysis from position: 8
Branch analysis from position: 54
Branch analysis from position: 40
Branch analysis from position: 34
Branch analysis from position: 22
filename:       /in/Wr2uk
function name:  (null)
number of ops:  65
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                                                      ->62
    6     4    >   ASSIGN                                                   !3, 1
          5      > JMP                                                      ->59
    7     6    >   ASSIGN                                                   !4, 1
          7      > JMP                                                      ->55
    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
   11    19        BOOL_NOT                                         ~17     !6
         20      > JMPZ_EX                                          ~17     ~17, ->22
         21    >   BOOL                                             ~17     !1
         22    > > JMPZ                                                     ~17, ->24
   12    23    > > JMP                                                      ->54
   15    24    >   BOOL_NOT                                         ~18     !6
         25      > JMPZ                                                     ~18, ->32
   16    26    >   ASSIGN                                                   !1, <true>
   17    27        ROPE_INIT                                     3  ~21     'Timestamp+failing+start+at+'
         28        ROPE_ADD                                      1  ~21     ~21, !5
         29        ROPE_END                                      2  ~20     ~21, '%0A'
         30        ECHO                                                     ~20
   18    31      > JMP                                                      ->54
   21    32    > > JMPZ_EX                                          ~23     !1, ->34
         33    >   BOOL                                             ~23     !6
         34    > > JMPZ                                                     ~23, ->40
   22    35    >   ASSIGN                                                   !1, <false>
   23    36        ROPE_INIT                                     3  ~26     'Timestamp+failinng+end+at+'
         37        ROPE_ADD                                      1  ~26     ~26, !5
         38        ROPE_END                                      2  ~25     ~26, '%0A'
         39        ECHO                                                     ~25
   27    40    >   INIT_FCALL                                               'date'
         41        SEND_VAL                                                 'Y-m-d+H%3Ai%3As'
         42        SEND_VAR                                                 !6
         43        DO_ICALL                                         $28     
         44        ASSIGN                                                   !7, $28
   28    45        IS_NOT_IDENTICAL                                         !5, !7
         46      > JMPZ                                                     ~30, ->54
   29    47    >   ROPE_INIT                                     6  ~32     !5
         48        ROPE_ADD                                      1  ~32     ~32, '+%28'
         49        ROPE_ADD                                      2  ~32     ~32, !6
         50        ROPE_ADD                                      3  ~32     ~32, '%29+'
         51        ROPE_ADD                                      4  ~32     ~32, !7
         52        ROPE_END                                      5  ~31     ~32, '%0A'
         53        ECHO                                                     ~31
    7    54    >   PRE_INC                                                  !4
         55    >   FETCH_DIM_R                                      ~36     !0, !3
         56        IS_SMALLER                                               !4, ~36
         57      > JMPNZ                                                    ~37, ->8
    6    58    >   PRE_INC                                                  !3
         59    >   IS_SMALLER_OR_EQUAL                                      !3, 12
         60      > JMPNZ                                                    ~39, ->6
    5    61    >   PRE_INC                                                  !2
         62    >   IS_SMALLER                                               !2, 2000
         63      > JMPNZ                                                    ~41, ->4
   34    64    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
157.66 ms | 1400 KiB | 19 Q