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<?php function validateDate($date, $format = 'm/d/Y') { $d = DateTime::createFromFormat($format, $date); return $d && $d->format($format) == $date; } $dateArr = ['12', '08', '2017']; var_dump(checkdate(intval($dateArr[0]), intval($dateArr[1]), intval($dateArr[2]))); var_dump(substr_compare($dateArr[2], '20', 0, 2) === 0); var_dump(validateDate($dateArr[0] . '/' . $dateArr[1] . '/' . $dateArr[2]));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/kgjnN
function name:  (null)
number of ops:  40
compiled vars:  !0 = $dateArr
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    9     0  E >   ASSIGN                                                   !0, <array>
   10     1        INIT_FCALL                                               'var_dump'
          2        INIT_FCALL                                               'checkdate'
          3        FETCH_DIM_R                                      ~2      !0, 0
          4        CAST                                          4  ~3      ~2
          5        SEND_VAL                                                 ~3
          6        FETCH_DIM_R                                      ~4      !0, 1
          7        CAST                                          4  ~5      ~4
          8        SEND_VAL                                                 ~5
          9        FETCH_DIM_R                                      ~6      !0, 2
         10        CAST                                          4  ~7      ~6
         11        SEND_VAL                                                 ~7
         12        DO_ICALL                                         $8      
         13        SEND_VAR                                                 $8
         14        DO_ICALL                                                 
   11    15        INIT_FCALL                                               'var_dump'
         16        INIT_FCALL                                               'substr_compare'
         17        FETCH_DIM_R                                      ~10     !0, 2
         18        SEND_VAL                                                 ~10
         19        SEND_VAL                                                 '20'
         20        SEND_VAL                                                 0
         21        SEND_VAL                                                 2
         22        DO_ICALL                                         $11     
         23        IS_IDENTICAL                                     ~12     $11, 0
         24        SEND_VAL                                                 ~12
         25        DO_ICALL                                                 
   12    26        INIT_FCALL                                               'var_dump'
         27        INIT_FCALL                                               'validatedate'
         28        FETCH_DIM_R                                      ~14     !0, 0
         29        CONCAT                                           ~15     ~14, '%2F'
         30        FETCH_DIM_R                                      ~16     !0, 1
         31        CONCAT                                           ~17     ~15, ~16
         32        CONCAT                                           ~18     ~17, '%2F'
         33        FETCH_DIM_R                                      ~19     !0, 2
         34        CONCAT                                           ~20     ~18, ~19
         35        SEND_VAL                                                 ~20
         36        DO_FCALL                                      0  $21     
         37        SEND_VAR                                                 $21
         38        DO_ICALL                                                 
         39      > RETURN                                                   1

Function validatedate:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 46) Position 1 = 8, Position 2 = 13
Branch analysis from position: 8
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 13
filename:       /in/kgjnN
function name:  validateDate
number of ops:  15
compiled vars:  !0 = $date, !1 = $format, !2 = $d
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
          1        RECV_INIT                                        !1      'm%2Fd%2FY'
    5     2        INIT_STATIC_METHOD_CALL                                  'DateTime', 'createFromFormat'
          3        SEND_VAR                                                 !1
          4        SEND_VAR                                                 !0
          5        DO_FCALL                                      0  $3      
          6        ASSIGN                                                   !2, $3
    6     7      > JMPZ_EX                                          ~5      !2, ->13
          8    >   INIT_METHOD_CALL                                         !2, 'format'
          9        SEND_VAR_EX                                              !1
         10        DO_FCALL                                      0  $6      
         11        IS_EQUAL                                         ~7      !0, $6
         12        BOOL                                             ~5      ~7
         13    > > RETURN                                                   ~5
    7    14*     > RETURN                                                   null

End of function validatedate

Generated using Vulcan Logic Dumper, using php 8.0.0


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