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<?php $datetimeStart1 = new DateTime('2015-12-10'); $datetimeStart1 = $datetimeStart1->format('U'); $datetimeEnd1 = new DateTime('2015-12-20'); $datetimeEnd1 = $datetimeEnd1->format('U'); $datetimeStart2 = new DateTime('2015-12-12'); $datetimeStart2 = $datetimeStart2->format('U'); $datetimeEnd2 = new DateTime('2015-12-28'); $datetimeEnd2 = $datetimeEnd2->format('U'); // following http://stackoverflow.com/questions/325933/determine-whether-two-date-ranges-overlap if ($datetimeStart1 < $datetimeEnd2 && $datetimeEnd1 > $datetimeStart2) { echo round( ((min($datetimeEnd1,$datetimeEnd2)) - (max($datetimeStart2,$datetimeStart1))) / (60*60*24)) + 1; } else { echo 'no overlap'; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 46) Position 1 = 34, Position 2 = 36
Branch analysis from position: 34
2 jumps found. (Code = 43) Position 1 = 37, Position 2 = 47
Branch analysis from position: 37
1 jumps found. (Code = 42) Position 1 = 48
Branch analysis from position: 48
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 47
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 36
filename:       /in/a1WLk
function name:  (null)
number of ops:  49
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        INIT_METHOD_CALL                                             !0, 'format'
          5        SEND_VAL_EX                                                  'U'
          6        DO_FCALL                                          0  $7      
          7        ASSIGN                                                       !0, $7
    5     8        NEW                                                  $9      'DateTime'
          9        SEND_VAL_EX                                                  '2015-12-20'
         10        DO_FCALL                                          0          
         11        ASSIGN                                                       !1, $9
    6    12        INIT_METHOD_CALL                                             !1, 'format'
         13        SEND_VAL_EX                                                  'U'
         14        DO_FCALL                                          0  $12     
         15        ASSIGN                                                       !1, $12
    8    16        NEW                                                  $14     'DateTime'
         17        SEND_VAL_EX                                                  '2015-12-12'
         18        DO_FCALL                                          0          
         19        ASSIGN                                                       !2, $14
    9    20        INIT_METHOD_CALL                                             !2, 'format'
         21        SEND_VAL_EX                                                  'U'
         22        DO_FCALL                                          0  $17     
         23        ASSIGN                                                       !2, $17
   10    24        NEW                                                  $19     'DateTime'
         25        SEND_VAL_EX                                                  '2015-12-28'
         26        DO_FCALL                                          0          
         27        ASSIGN                                                       !3, $19
   11    28        INIT_METHOD_CALL                                             !3, 'format'
         29        SEND_VAL_EX                                                  'U'
         30        DO_FCALL                                          0  $22     
         31        ASSIGN                                                       !3, $22
   14    32        IS_SMALLER                                           ~24     !0, !3
         33      > JMPZ_EX                                              ~24     ~24, ->36
         34    >   IS_SMALLER                                           ~25     !2, !1
         35        BOOL                                                 ~24     ~25
         36    > > JMPZ                                                         ~24, ->47
   15    37    >   INIT_FCALL                                                   'round'
   16    38        FRAMELESS_ICALL_2                min                 ~26     !1, !3
         39        FRAMELESS_ICALL_2                max                 ~27     !2, !0
         40        SUB                                                  ~28     ~26, ~27
         41        DIV                                                  ~29     ~28, 86400
         42        SEND_VAL                                                     ~29
   15    43        DO_ICALL                                             $30     
   16    44        ADD                                                  ~31     $30, 1
         45        ECHO                                                         ~31
   14    46      > JMP                                                          ->48
   18    47    >   ECHO                                                         'no+overlap'
   19    48    > > RETURN                                                       1

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