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<?php $datetimeStart1 = new DateTime('2015-12-10'); $datetimeEnd1 = new DateTime('2015-12-20'); $datetimeStart2 = new DateTime('2015-12-12'); $datetimeEnd2 = new DateTime('2015-12-28'); // following http://stackoverflow.com/questions/325933/determine-whether-two-date-ranges-overlap if ($datetimeStart1 < $datetimeEnd2 && $datetimeEnd1 > $datetimeStart2) { echo min($datetimeEnd1,$datetimeEnd2)->diff(max($datetimeStart2,$datetimeStart1))->days+1; } else { echo 'no overlap'; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 46) Position 1 = 18, Position 2 = 20
Branch analysis from position: 18
2 jumps found. (Code = 43) Position 1 = 21, Position 2 = 30
Branch analysis from position: 21
1 jumps found. (Code = 42) Position 1 = 31
Branch analysis from position: 31
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 30
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 20
filename:       /in/9Pecb
function name:  (null)
number of ops:  32
compiled vars:  !0 = $datetimeStart1, !1 = $datetimeEnd1, !2 = $datetimeStart2, !3 = $datetimeEnd2
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   NEW                                                  $4      'DateTime'
          1        SEND_VAL_EX                                                  '2015-12-10'
          2        DO_FCALL                                          0          
          3        ASSIGN                                                       !0, $4
    4     4        NEW                                                  $7      'DateTime'
          5        SEND_VAL_EX                                                  '2015-12-20'
          6        DO_FCALL                                          0          
          7        ASSIGN                                                       !1, $7
    6     8        NEW                                                  $10     'DateTime'
          9        SEND_VAL_EX                                                  '2015-12-12'
         10        DO_FCALL                                          0          
         11        ASSIGN                                                       !2, $10
    7    12        NEW                                                  $13     'DateTime'
         13        SEND_VAL_EX                                                  '2015-12-28'
         14        DO_FCALL                                          0          
         15        ASSIGN                                                       !3, $13
   10    16        IS_SMALLER                                           ~16     !0, !3
         17      > JMPZ_EX                                              ~16     ~16, ->20
         18    >   IS_SMALLER                                           ~17     !2, !1
         19        BOOL                                                 ~16     ~17
         20    > > JMPZ                                                         ~16, ->30
   11    21    >   FRAMELESS_ICALL_2                min                 ~18     !1, !3
         22        INIT_METHOD_CALL                                             ~18, 'diff'
         23        FRAMELESS_ICALL_2                max                 ~19     !2, !0
         24        SEND_VAL_EX                                                  ~19
         25        DO_FCALL                                          0  $20     
         26        FETCH_OBJ_R                                          ~21     $20, 'days'
         27        ADD                                                  ~22     ~21, 1
         28        ECHO                                                         ~22
   10    29      > JMP                                                          ->31
   13    30    >   ECHO                                                         'no+overlap'
   14    31    > > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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