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<?php function daysUntil($start,$end){ $datetime1 = date_create(date('Y-m-d',strtotime($start))); $datetime2 = date_create(date('Y-m-d',strtotime($end))); $interval = date_diff($datetime1, $datetime2); return "From $start to $end: ".$interval->format('%d'); } echo daysUntil('Wednesday','Saturday'),"\n"; // Thursday, Friday, Saturday echo daysUntil('Monday','Friday'),"\n"; // Tuesday, Wednesday, Thursday, Friday echo daysUntil('Thursday','Thursday'),"\n"; // [assumed next week] echo daysUntil('Friday','Monday'),"\n"; // Saturday, Sunday, Monday echo daysUntil('Saturday','Sunday'),"\n"; // Sunday echo daysUntil('Sunday','Saturday'),"\n"; // 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/BO44o
function name:  (null)
number of ops:  42
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   10     0  E >   INIT_FCALL                                               'daysuntil'
          1        SEND_VAL                                                 'Wednesday'
          2        SEND_VAL                                                 'Saturday'
          3        DO_FCALL                                      0  $0      
          4        ECHO                                                     $0
          5        ECHO                                                     '%0A'
   11     6        INIT_FCALL                                               'daysuntil'
          7        SEND_VAL                                                 'Monday'
          8        SEND_VAL                                                 'Friday'
          9        DO_FCALL                                      0  $1      
         10        ECHO                                                     $1
         11        ECHO                                                     '%0A'
   12    12        INIT_FCALL                                               'daysuntil'
         13        SEND_VAL                                                 'Thursday'
         14        SEND_VAL                                                 'Thursday'
         15        DO_FCALL                                      0  $2      
         16        ECHO                                                     $2
         17        ECHO                                                     '%0A'
   13    18        INIT_FCALL                                               'daysuntil'
         19        SEND_VAL                                                 'Friday'
         20        SEND_VAL                                                 'Monday'
         21        DO_FCALL                                      0  $3      
         22        ECHO                                                     $3
         23        ECHO                                                     '%0A'
   14    24        INIT_FCALL                                               'daysuntil'
         25        SEND_VAL                                                 'Saturday'
         26        SEND_VAL                                                 'Sunday'
         27        DO_FCALL                                      0  $4      
         28        ECHO                                                     $4
         29        ECHO                                                     '%0A'
   15    30        INIT_FCALL                                               'daysuntil'
         31        SEND_VAL                                                 'Sunday'
         32        SEND_VAL                                                 'Saturday'
         33        DO_FCALL                                      0  $5      
         34        ECHO                                                     $5
         35        ECHO                                                     '%0A'
   16    36        INIT_FCALL                                               'daysuntil'
         37        SEND_VAL                                                 'Sunday'
         38        SEND_VAL                                                 'Wednesday'
         39        DO_FCALL                                      0  $6      
         40        ECHO                                                     $6
         41      > RETURN                                                   1

Function daysuntil:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/BO44o
function name:  daysUntil
number of ops:  40
compiled vars:  !0 = $start, !1 = $end, !2 = $datetime1, !3 = $datetime2, !4 = $interval
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   RECV                                             !0      
          1        RECV                                             !1      
    3     2        INIT_FCALL                                               'date_create'
          3        INIT_FCALL                                               'date'
          4        SEND_VAL                                                 'Y-m-d'
          5        INIT_FCALL                                               'strtotime'
          6        SEND_VAR                                                 !0
          7        DO_ICALL                                         $5      
          8        SEND_VAR                                                 $5
          9        DO_ICALL                                         $6      
         10        SEND_VAR                                                 $6
         11        DO_ICALL                                         $7      
         12        ASSIGN                                                   !2, $7
    4    13        INIT_FCALL                                               'date_create'
         14        INIT_FCALL                                               'date'
         15        SEND_VAL                                                 'Y-m-d'
         16        INIT_FCALL                                               'strtotime'
         17        SEND_VAR                                                 !1
         18        DO_ICALL                                         $9      
         19        SEND_VAR                                                 $9
         20        DO_ICALL                                         $10     
         21        SEND_VAR                                                 $10
         22        DO_ICALL                                         $11     
         23        ASSIGN                                                   !3, $11
    6    24        INIT_FCALL                                               'date_diff'
         25        SEND_VAR                                                 !2
         26        SEND_VAR                                                 !3
         27        DO_ICALL                                         $13     
         28        ASSIGN                                                   !4, $13
    7    29        ROPE_INIT                                     5  ~16     'From+'
         30        ROPE_ADD                                      1  ~16     ~16, !0
         31        ROPE_ADD                                      2  ~16     ~16, '+to+'
         32        ROPE_ADD                                      3  ~16     ~16, !1
         33        ROPE_END                                      4  ~15     ~16, '%3A+'
         34        INIT_METHOD_CALL                                         !4, 'format'
         35        SEND_VAL_EX                                              '%25d'
         36        DO_FCALL                                      0  $19     
         37        CONCAT                                           ~20     ~15, $19
         38      > RETURN                                                   ~20
    8    39*     > RETURN                                                   null

End of function daysuntil

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