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<?php function chk($word) { echo PHP_EOL . 'Word: ' . $word . ' - '; if (preg_match('/^[0-9]+$/u', $word)) { echo 'Ok.' . PHP_EOL; } else { echo 'Ng.' . PHP_EOL; }; } chk('abc12345'); chk('abc12345'); chk('12345abc'); chk('12345abc'); chk('12345'); chk('12345'); chk('1122334455'); chk('12.345');
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/8C3lC
function name:  (null)
number of ops:  25
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   13     0  E >   INIT_FCALL                                               'chk'
          1        SEND_VAL                                                 'abc12345'
          2        DO_FCALL                                      0          
   14     3        INIT_FCALL                                               'chk'
          4        SEND_VAL                                                 '%EF%BD%81%EF%BD%82%EF%BD%83%EF%BC%91%EF%BC%92%EF%BC%93%EF%BC%94%EF%BC%95'
          5        DO_FCALL                                      0          
   15     6        INIT_FCALL                                               'chk'
          7        SEND_VAL                                                 '12345abc'
          8        DO_FCALL                                      0          
   16     9        INIT_FCALL                                               'chk'
         10        SEND_VAL                                                 '%EF%BC%91%EF%BC%92%EF%BC%93%EF%BC%94%EF%BC%95%EF%BD%81%EF%BD%82%EF%BD%83'
         11        DO_FCALL                                      0          
   17    12        INIT_FCALL                                               'chk'
         13        SEND_VAL                                                 '12345'
         14        DO_FCALL                                      0          
   18    15        INIT_FCALL                                               'chk'
         16        SEND_VAL                                                 '%EF%BC%91%EF%BC%92%EF%BC%93%EF%BC%94%EF%BC%95'
         17        DO_FCALL                                      0          
   19    18        INIT_FCALL                                               'chk'
         19        SEND_VAL                                                 '1%EF%BC%912%EF%BC%923%EF%BC%934%EF%BC%945%EF%BC%95'
         20        DO_FCALL                                      0          
   20    21        INIT_FCALL                                               'chk'
         22        SEND_VAL                                                 '12.345'
         23        DO_FCALL                                      0          
         24      > RETURN                                                   1

Function chk:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 9, Position 2 = 11
Branch analysis from position: 9
1 jumps found. (Code = 42) Position 1 = 12
Branch analysis from position: 12
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 11
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/8C3lC
function name:  chk
number of ops:  13
compiled vars:  !0 = $word
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
    4     1        CONCAT                                           ~1      '%0AWord%3A+', !0
          2        CONCAT                                           ~2      ~1, '+-+'
          3        ECHO                                                     ~2
    5     4        INIT_FCALL                                               'preg_match'
          5        SEND_VAL                                                 '%2F%5E%5B0-9%5D%2B%24%2Fu'
          6        SEND_VAR                                                 !0
          7        DO_ICALL                                         $3      
          8      > JMPZ                                                     $3, ->11
    6     9    >   ECHO                                                     'Ok.%0A'
    5    10      > JMP                                                      ->12
    9    11    >   ECHO                                                     'Ng.%0A'
   11    12    > > RETURN                                                   null

End of function chk

Generated using Vulcan Logic Dumper, using php 8.0.0


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