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<?php $overlaps = []; foreach ($intervals as $interval) { $key = null; foreach ($overlaps as $_key => $_intervals) { foreach ($_intervals as $_interval) { if ( ($_interval['from_time'] <= $interval['from_time'] && $interval['from_time'] <= $_interval['to_time']) || ($_interval['from_time'] <= $interval['to_time'] && $interval['to_time'] <= $_interval['to_time']) ) { $key = $_key; break 2; } } } if (is_null($key)) { $key = count($overlaps); } $overlaps[$key][] = $interval; } foreach ($overlaps as &$overlap) { $from = '00:00'; $to = '23:59'; foreach ($overlap as $_interval) { $from = max($from, $_interval['from_time']); $to = min($to, $_interval['to_time']); } $overlap = ['from_time' => $from, 'to_time' => $to]; } unset($overlap); print_r($overlaps);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 2, Position 2 = 43
Branch analysis from position: 2
2 jumps found. (Code = 78) Position 1 = 3, Position 2 = 43
Branch analysis from position: 3
2 jumps found. (Code = 77) Position 1 = 5, Position 2 = 34
Branch analysis from position: 5
2 jumps found. (Code = 78) Position 1 = 6, Position 2 = 34
Branch analysis from position: 6
2 jumps found. (Code = 77) Position 1 = 8, Position 2 = 32
Branch analysis from position: 8
2 jumps found. (Code = 78) Position 1 = 9, Position 2 = 32
Branch analysis from position: 9
2 jumps found. (Code = 46) Position 1 = 13, Position 2 = 17
Branch analysis from position: 13
2 jumps found. (Code = 47) Position 1 = 18, Position 2 = 27
Branch analysis from position: 18
2 jumps found. (Code = 46) Position 1 = 22, Position 2 = 26
Branch analysis from position: 22
2 jumps found. (Code = 43) Position 1 = 28, Position 2 = 31
Branch analysis from position: 28
1 jumps found. (Code = 42) Position 1 = 34
Branch analysis from position: 34
2 jumps found. (Code = 43) Position 1 = 37, Position 2 = 39
Branch analysis from position: 37
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 39
Branch analysis from position: 31
1 jumps found. (Code = 42) Position 1 = 8
Branch analysis from position: 8
Branch analysis from position: 26
Branch analysis from position: 27
Branch analysis from position: 17
Branch analysis from position: 32
1 jumps found. (Code = 42) Position 1 = 5
Branch analysis from position: 5
Branch analysis from position: 32
Branch analysis from position: 34
Branch analysis from position: 34
Branch analysis from position: 43
2 jumps found. (Code = 125) Position 1 = 45, Position 2 = 68
Branch analysis from position: 45
2 jumps found. (Code = 126) Position 1 = 46, Position 2 = 68
Branch analysis from position: 46
2 jumps found. (Code = 77) Position 1 = 49, Position 2 = 63
Branch analysis from position: 49
2 jumps found. (Code = 78) Position 1 = 50, Position 2 = 63
Branch analysis from position: 50
1 jumps found. (Code = 42) Position 1 = 49
Branch analysis from position: 49
Branch analysis from position: 63
1 jumps found. (Code = 42) Position 1 = 45
Branch analysis from position: 45
Branch analysis from position: 63
Branch analysis from position: 68
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 68
Branch analysis from position: 43
filename:       /in/JpRmC
function name:  (null)
number of ops:  74
compiled vars:  !0 = $overlaps, !1 = $intervals, !2 = $interval, !3 = $key, !4 = $_intervals, !5 = $_key, !6 = $_interval, !7 = $overlap, !8 = $from, !9 = $to
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    5     1      > FE_RESET_R                                       $11     !1, ->43
          2    > > FE_FETCH_R                                               $11, !2, ->43
    6     3    >   ASSIGN                                                   !3, null
    7     4      > FE_RESET_R                                       $13     !0, ->34
          5    > > FE_FETCH_R                                       ~14     $13, !4, ->34
          6    >   ASSIGN                                                   !5, ~14
    8     7      > FE_RESET_R                                       $16     !4, ->32
          8    > > FE_FETCH_R                                               $16, !6, ->32
   10     9    >   FETCH_DIM_R                                      ~17     !6, 'from_time'
         10        FETCH_DIM_R                                      ~18     !2, 'from_time'
         11        IS_SMALLER_OR_EQUAL                              ~19     ~17, ~18
         12      > JMPZ_EX                                          ~19     ~19, ->17
         13    >   FETCH_DIM_R                                      ~20     !2, 'from_time'
         14        FETCH_DIM_R                                      ~21     !6, 'to_time'
         15        IS_SMALLER_OR_EQUAL                              ~22     ~20, ~21
         16        BOOL                                             ~19     ~22
         17    > > JMPNZ_EX                                         ~19     ~19, ->27
   12    18    >   FETCH_DIM_R                                      ~23     !6, 'from_time'
         19        FETCH_DIM_R                                      ~24     !2, 'to_time'
         20        IS_SMALLER_OR_EQUAL                              ~25     ~23, ~24
         21      > JMPZ_EX                                          ~25     ~25, ->26
         22    >   FETCH_DIM_R                                      ~26     !2, 'to_time'
         23        FETCH_DIM_R                                      ~27     !6, 'to_time'
         24        IS_SMALLER_OR_EQUAL                              ~28     ~26, ~27
         25        BOOL                                             ~25     ~28
         26    >   BOOL                                             ~19     ~25
         27    > > JMPZ                                                     ~19, ->31
   14    28    >   ASSIGN                                                   !3, !5
   15    29        FE_FREE                                                  $16
         30      > JMP                                                      ->34
    8    31    > > JMP                                                      ->8
         32    >   FE_FREE                                                  $16
    7    33      > JMP                                                      ->5
         34    >   FE_FREE                                                  $13
   19    35        TYPE_CHECK                                    2          !3
         36      > JMPZ                                                     ~30, ->39
   20    37    >   COUNT                                            ~31     !0
         38        ASSIGN                                                   !3, ~31
   22    39    >   FETCH_DIM_W                                      $33     !0, !3
         40        ASSIGN_DIM                                               $33
         41        OP_DATA                                                  !2
    5    42      > JMP                                                      ->2
         43    >   FE_FREE                                                  $11
   24    44      > FE_RESET_RW                                      $35     !0, ->68
         45    > > FE_FETCH_RW                                              $35, !7, ->68
   25    46    >   ASSIGN                                                   !8, '00%3A00'
   26    47        ASSIGN                                                   !9, '23%3A59'
   27    48      > FE_RESET_R                                       $38     !7, ->63
         49    > > FE_FETCH_R                                               $38, !6, ->63
   28    50    >   INIT_FCALL                                               'max'
         51        SEND_VAR                                                 !8
         52        FETCH_DIM_R                                      ~39     !6, 'from_time'
         53        SEND_VAL                                                 ~39
         54        DO_ICALL                                         $40     
         55        ASSIGN                                                   !8, $40
   29    56        INIT_FCALL                                               'min'
         57        SEND_VAR                                                 !9
         58        FETCH_DIM_R                                      ~42     !6, 'to_time'
         59        SEND_VAL                                                 ~42
         60        DO_ICALL                                         $43     
         61        ASSIGN                                                   !9, $43
   27    62      > JMP                                                      ->49
         63    >   FE_FREE                                                  $38
   31    64        INIT_ARRAY                                       ~45     !8, 'from_time'
         65        ADD_ARRAY_ELEMENT                                ~45     !9, 'to_time'
         66        ASSIGN                                                   !7, ~45
   24    67      > JMP                                                      ->45
         68    >   FE_FREE                                                  $35
   33    69        UNSET_CV                                                 !7
   35    70        INIT_FCALL                                               'print_r'
         71        SEND_VAR                                                 !0
         72        DO_ICALL                                                 
         73      > RETURN                                                   1

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