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<?php function validate($pattern, $input) { $escaped = preg_quote($pattern); $regex = '/^'.str_replace('&','[0-9a-zA-Z]',$escaped).'$/'; return preg_match($regex, $input); } echo validate('&-&', 'asd')."\n"; // 0 echo validate('&&&-&&&', 'asd-123')."\n"; // 1 echo validate('&-&', 'a-1')."\n"; // 1 echo validate('&&&{}[]().+*\\^$', 'asd{}[]().+*\\^$')."\n"; // 1 ?>
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/CdltM
function name:  (null)
number of ops:  25
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    8     0  E >   INIT_FCALL                                               'validate'
          1        SEND_VAL                                                 '%26-%26'
          2        SEND_VAL                                                 'asd'
          3        DO_FCALL                                      0  $0      
          4        CONCAT                                           ~1      $0, '%0A'
          5        ECHO                                                     ~1
    9     6        INIT_FCALL                                               'validate'
          7        SEND_VAL                                                 '%26%26%26-%26%26%26'
          8        SEND_VAL                                                 'asd-123'
          9        DO_FCALL                                      0  $2      
         10        CONCAT                                           ~3      $2, '%0A'
         11        ECHO                                                     ~3
   10    12        INIT_FCALL                                               'validate'
         13        SEND_VAL                                                 '%26-%26'
         14        SEND_VAL                                                 'a-1'
         15        DO_FCALL                                      0  $4      
         16        CONCAT                                           ~5      $4, '%0A'
         17        ECHO                                                     ~5
   11    18        INIT_FCALL                                               'validate'
         19        SEND_VAL                                                 '%26%26%26%7B%7D%5B%5D%28%29.%2B%2A%5C%5E%24'
         20        SEND_VAL                                                 'asd%7B%7D%5B%5D%28%29.%2B%2A%5C%5E%24'
         21        DO_FCALL                                      0  $6      
         22        CONCAT                                           ~7      $6, '%0A'
         23        ECHO                                                     ~7
   12    24      > RETURN                                                   1

Function validate:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/CdltM
function name:  validate
number of ops:  20
compiled vars:  !0 = $pattern, !1 = $input, !2 = $escaped, !3 = $regex
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   RECV                                             !0      
          1        RECV                                             !1      
    3     2        INIT_FCALL                                               'preg_quote'
          3        SEND_VAR                                                 !0
          4        DO_ICALL                                         $4      
          5        ASSIGN                                                   !2, $4
    4     6        INIT_FCALL                                               'str_replace'
          7        SEND_VAL                                                 '%26'
          8        SEND_VAL                                                 '%5B0-9a-zA-Z%5D'
          9        SEND_VAR                                                 !2
         10        DO_ICALL                                         $6      
         11        CONCAT                                           ~7      '%2F%5E', $6
         12        CONCAT                                           ~8      ~7, '%24%2F'
         13        ASSIGN                                                   !3, ~8
    5    14        INIT_FCALL                                               'preg_match'
         15        SEND_VAR                                                 !3
         16        SEND_VAR                                                 !1
         17        DO_ICALL                                         $10     
         18      > RETURN                                                   $10
    6    19*     > RETURN                                                   null

End of function validate

Generated using Vulcan Logic Dumper, using php 8.0.0


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