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<? $values = array( '-0', -0, 0, 123, -123, '123', '-123', '0123', '123 ', '0', '000', '+123', '1.23', 1.23, '123e4', '0x123', 'potato', 'EEBD', false, null, ); foreach($values as $value){ echo("TRYING WITH "); var_dump($value); echo("is_int: "); var_dump(is_int($value)); echo("is_numeric: "); var_dump(is_numeric($value)); echo("regex: "); var_dump(preg_match('/^\-?[0-9]+$/',$value)); echo("ctype_digit: "); var_dump(ctype_digit(ltrim((string)$value, '-'))); echo("filter_var: "); var_dump(filter_var($value, FILTER_VALIDATE_INT)); echo("\n"); echo("\n"); } ?>
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 2, Position 2 = 50
Branch analysis from position: 2
2 jumps found. (Code = 78) Position 1 = 3, Position 2 = 50
Branch analysis from position: 3
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 50
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 50
filename:       /in/gQk1p
function name:  (null)
number of ops:  52
compiled vars:  !0 = $values, !1 = $value
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
   25     1      > FE_RESET_R                                       $3      !0, ->50
          2    > > FE_FETCH_R                                               $3, !1, ->50
   26     3    >   ECHO                                                     'TRYING+WITH+'
   27     4        INIT_FCALL                                               'var_dump'
          5        SEND_VAR                                                 !1
          6        DO_ICALL                                                 
   29     7        ECHO                                                     'is_int%3A+'
   30     8        INIT_FCALL                                               'var_dump'
          9        TYPE_CHECK                                   16  ~5      !1
         10        SEND_VAL                                                 ~5
         11        DO_ICALL                                                 
   32    12        ECHO                                                     'is_numeric%3A+'
   33    13        INIT_FCALL                                               'var_dump'
         14        INIT_FCALL                                               'is_numeric'
         15        SEND_VAR                                                 !1
         16        DO_ICALL                                         $7      
         17        SEND_VAR                                                 $7
         18        DO_ICALL                                                 
   35    19        ECHO                                                     'regex%3A+'
   36    20        INIT_FCALL                                               'var_dump'
         21        INIT_FCALL                                               'preg_match'
         22        SEND_VAL                                                 '%2F%5E%5C-%3F%5B0-9%5D%2B%24%2F'
         23        SEND_VAR                                                 !1
         24        DO_ICALL                                         $9      
         25        SEND_VAR                                                 $9
         26        DO_ICALL                                                 
   38    27        ECHO                                                     'ctype_digit%3A+'
   39    28        INIT_FCALL                                               'var_dump'
         29        INIT_FCALL                                               'ctype_digit'
         30        INIT_FCALL                                               'ltrim'
         31        CAST                                          6  ~11     !1
         32        SEND_VAL                                                 ~11
         33        SEND_VAL                                                 '-'
         34        DO_ICALL                                         $12     
         35        SEND_VAR                                                 $12
         36        DO_ICALL                                         $13     
         37        SEND_VAR                                                 $13
         38        DO_ICALL                                                 
   41    39        ECHO                                                     'filter_var%3A+'
   42    40        INIT_FCALL                                               'var_dump'
         41        INIT_FCALL                                               'filter_var'
         42        SEND_VAR                                                 !1
         43        SEND_VAL                                                 257
         44        DO_ICALL                                         $15     
         45        SEND_VAR                                                 $15
         46        DO_ICALL                                                 
   43    47        ECHO                                                     '%0A'
   44    48        ECHO                                                     '%0A'
   25    49      > JMP                                                      ->2
         50    >   FE_FREE                                                  $3
   46    51      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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