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<?php function validateDateA($date, $format = 'Y-m-d') { $dt = DateTime::createFromFormat($format, $date); return $dt && $dt->format($format) == $date; } function validateDateB($date, $format = 'Y-m-d') { DateTime::createFromFormat($format, $date); $a = DateTime::getLastErrors(); return !$a['warning_count'] && !$a['error_count']; } var_dump(validateDateA('Tue, 27 Feb 2012 12:12:12 +0200', DateTime::RSS)); # false var_dump(validateDateA('Mon, 29 Feb 2012 12:12:12 +0200', DateTime::RSS)); # true var_dump(validateDateB('Tue, 27 Feb 2012 12:12:12 +0200', DateTime::RSS)); # true var_dump(validateDateB('Fri, 27 Feb 2012 12:12:12 +0200', DateTime::RSS)); # true var_dump(validateDateB('Xxx, 27 Feb 2012 12:12:12 +0200', DateTime::RSS)); # false var_dump(validateDateB('Aaa, 27 Feb 2012 12:12:12 +0200', DateTime::RSS)); # false
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/soYQa
function name:  (null)
number of ops:  43
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   15     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'validatedatea'
          2        SEND_VAL                                                 'Tue%2C+27+Feb+2012+12%3A12%3A12+%2B0200'
          3        SEND_VAL                                                 'D%2C+d+M+Y+H%3Ai%3As+O'
          4        DO_FCALL                                      0  $0      
          5        SEND_VAR                                                 $0
          6        DO_ICALL                                                 
   16     7        INIT_FCALL                                               'var_dump'
          8        INIT_FCALL                                               'validatedatea'
          9        SEND_VAL                                                 'Mon%2C+29+Feb+2012+12%3A12%3A12+%2B0200'
         10        SEND_VAL                                                 'D%2C+d+M+Y+H%3Ai%3As+O'
         11        DO_FCALL                                      0  $2      
         12        SEND_VAR                                                 $2
         13        DO_ICALL                                                 
   17    14        INIT_FCALL                                               'var_dump'
         15        INIT_FCALL                                               'validatedateb'
         16        SEND_VAL                                                 'Tue%2C+27+Feb+2012+12%3A12%3A12+%2B0200'
         17        SEND_VAL                                                 'D%2C+d+M+Y+H%3Ai%3As+O'
         18        DO_FCALL                                      0  $4      
         19        SEND_VAR                                                 $4
         20        DO_ICALL                                                 
   18    21        INIT_FCALL                                               'var_dump'
         22        INIT_FCALL                                               'validatedateb'
         23        SEND_VAL                                                 'Fri%2C+27+Feb+2012+12%3A12%3A12+%2B0200'
         24        SEND_VAL                                                 'D%2C+d+M+Y+H%3Ai%3As+O'
         25        DO_FCALL                                      0  $6      
         26        SEND_VAR                                                 $6
         27        DO_ICALL                                                 
   19    28        INIT_FCALL                                               'var_dump'
         29        INIT_FCALL                                               'validatedateb'
         30        SEND_VAL                                                 'Xxx%2C+27+Feb+2012+12%3A12%3A12+%2B0200'
         31        SEND_VAL                                                 'D%2C+d+M+Y+H%3Ai%3As+O'
         32        DO_FCALL                                      0  $8      
         33        SEND_VAR                                                 $8
         34        DO_ICALL                                                 
   20    35        INIT_FCALL                                               'var_dump'
         36        INIT_FCALL                                               'validatedateb'
         37        SEND_VAL                                                 'Aaa%2C+27+Feb+2012+12%3A12%3A12+%2B0200'
         38        SEND_VAL                                                 'D%2C+d+M+Y+H%3Ai%3As+O'
         39        DO_FCALL                                      0  $10     
         40        SEND_VAR                                                 $10
         41        DO_ICALL                                                 
         42      > RETURN                                                   1

Function validatedatea:
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/soYQa
function name:  validateDateA
number of ops:  15
compiled vars:  !0 = $date, !1 = $format, !2 = $dt
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   RECV                                             !0      
          1        RECV_INIT                                        !1      'Y-m-d'
    4     2        INIT_STATIC_METHOD_CALL                                  'DateTime', 'createFromFormat'
          3        SEND_VAR                                                 !1
          4        SEND_VAR                                                 !0
          5        DO_FCALL                                      0  $3      
          6        ASSIGN                                                   !2, $3
    5     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
    6    14*     > RETURN                                                   null

End of function validatedatea

Function validatedateb:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 46) Position 1 = 12, Position 2 = 15
Branch analysis from position: 12
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 15
filename:       /in/soYQa
function name:  validateDateB
number of ops:  17
compiled vars:  !0 = $date, !1 = $format, !2 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    8     0  E >   RECV                                             !0      
          1        RECV_INIT                                        !1      'Y-m-d'
   10     2        INIT_STATIC_METHOD_CALL                                  'DateTime', 'createFromFormat'
          3        SEND_VAR                                                 !1
          4        SEND_VAR                                                 !0
          5        DO_FCALL                                      0          
   11     6        INIT_STATIC_METHOD_CALL                                  'DateTime', 'getLastErrors'
          7        DO_FCALL                                      0  $4      
          8        ASSIGN                                                   !2, $4
   12     9        FETCH_DIM_R                                      ~6      !2, 'warning_count'
         10        BOOL_NOT                                         ~7      ~6
         11      > JMPZ_EX                                          ~7      ~7, ->15
         12    >   FETCH_DIM_R                                      ~8      !2, 'error_count'
         13        BOOL_NOT                                         ~9      ~8
         14        BOOL                                             ~7      ~9
         15    > > RETURN                                                   ~7
   13    16*     > RETURN                                                   null

End of function validatedateb

Generated using Vulcan Logic Dumper, using php 8.0.0


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