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<?php function daysUntil($start, $end) { $lookup = ['Sunday' => 0, 'Monday' => 1, 'Tuesday' => 2, 'Wednesday' => 3, 'Thursday' => 4, 'Friday' => 5, 'Saturday' => 6]; $days = $lookup[$end] - $lookup[$start] + ($lookup[$end] <= $lookup[$start] ? 7 : 0); return "{$days} days from {$start} to {$end}\n"; } echo daysUntil('Wednesday', 'Saturday'); // Thursday, Friday, Saturday echo daysUntil('Monday', 'Friday'); // Tuesday, Wednesday, Thursday, Friday echo daysUntil('Thursday', 'Thursday'); // [assumed next week] echo daysUntil('Friday', 'Monday'); // Saturday, Sunday, Monday echo daysUntil('Saturday', 'Sunday'); // Sunday echo daysUntil('Sunday', 'Saturday'); // Monday, Tuesday, Wednesday, Thursday, Friday, Saturday echo daysUntil('Sunday', 'Wednesday'); // Monday, Tuesday, Wednesday
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/gdekl
function name:  (null)
number of ops:  36
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    8     0  E >   INIT_FCALL                                               'daysuntil'
          1        SEND_VAL                                                 'Wednesday'
          2        SEND_VAL                                                 'Saturday'
          3        DO_FCALL                                      0  $0      
          4        ECHO                                                     $0
    9     5        INIT_FCALL                                               'daysuntil'
          6        SEND_VAL                                                 'Monday'
          7        SEND_VAL                                                 'Friday'
          8        DO_FCALL                                      0  $1      
          9        ECHO                                                     $1
   10    10        INIT_FCALL                                               'daysuntil'
         11        SEND_VAL                                                 'Thursday'
         12        SEND_VAL                                                 'Thursday'
         13        DO_FCALL                                      0  $2      
         14        ECHO                                                     $2
   11    15        INIT_FCALL                                               'daysuntil'
         16        SEND_VAL                                                 'Friday'
         17        SEND_VAL                                                 'Monday'
         18        DO_FCALL                                      0  $3      
         19        ECHO                                                     $3
   12    20        INIT_FCALL                                               'daysuntil'
         21        SEND_VAL                                                 'Saturday'
         22        SEND_VAL                                                 'Sunday'
         23        DO_FCALL                                      0  $4      
         24        ECHO                                                     $4
   13    25        INIT_FCALL                                               'daysuntil'
         26        SEND_VAL                                                 'Sunday'
         27        SEND_VAL                                                 'Saturday'
         28        DO_FCALL                                      0  $5      
         29        ECHO                                                     $5
   14    30        INIT_FCALL                                               'daysuntil'
         31        SEND_VAL                                                 'Sunday'
         32        SEND_VAL                                                 'Wednesday'
         33        DO_FCALL                                      0  $6      
         34        ECHO                                                     $6
         35      > RETURN                                                   1

Function daysuntil:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 10, Position 2 = 12
Branch analysis from position: 10
1 jumps found. (Code = 42) Position 1 = 13
Branch analysis from position: 13
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 12
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/gdekl
function name:  daysUntil
number of ops:  23
compiled vars:  !0 = $start, !1 = $end, !2 = $lookup, !3 = $days
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   RECV                                             !0      
          1        RECV                                             !1      
    3     2        ASSIGN                                                   !2, <array>
    4     3        FETCH_DIM_R                                      ~5      !2, !1
          4        FETCH_DIM_R                                      ~6      !2, !0
          5        SUB                                              ~7      ~5, ~6
          6        FETCH_DIM_R                                      ~8      !2, !1
          7        FETCH_DIM_R                                      ~9      !2, !0
          8        IS_SMALLER_OR_EQUAL                                      ~8, ~9
          9      > JMPZ                                                     ~10, ->12
         10    >   QM_ASSIGN                                        ~11     7
         11      > JMP                                                      ->13
         12    >   QM_ASSIGN                                        ~11     0
         13    >   ADD                                              ~12     ~7, ~11
         14        ASSIGN                                                   !3, ~12
    5    15        ROPE_INIT                                     6  ~15     !3
         16        ROPE_ADD                                      1  ~15     ~15, '+days+from+'
         17        ROPE_ADD                                      2  ~15     ~15, !0
         18        ROPE_ADD                                      3  ~15     ~15, '+to+'
         19        ROPE_ADD                                      4  ~15     ~15, !1
         20        ROPE_END                                      5  ~14     ~15, '%0A'
         21      > RETURN                                                   ~14
    6    22*     > RETURN                                                   null

End of function daysuntil

Generated using Vulcan Logic Dumper, using php 8.0.0


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