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<?php class NotAnInt { function __toString() { return " 1"; } } // the filter_* functions trim whitespace which can result in data loss var_dump(filter_var(" 1 ", FILTER_VALIDATE_INT)); // because filter_var casts passed values to a string, it accepts various unsafe values var_dump(filter_var(true, FILTER_VALIDATE_INT)); var_dump(filter_var(1.00000000000001, FILTER_VALIDATE_INT)); var_dump(filter_var(new NotAnInt(), FILTER_VALIDATE_INT));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ObLpV
function name:  (null)
number of ops:  32
compiled vars:  none
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   DECLARE_CLASS                                                'notanint'
   10     1        INIT_FCALL                                                   'var_dump'
          2        INIT_FCALL                                                   'filter_var'
          3        SEND_VAL                                                     '+++1++++'
          4        SEND_VAL                                                     257
          5        DO_ICALL                                             $0      
          6        SEND_VAR                                                     $0
          7        DO_ICALL                                                     
   13     8        INIT_FCALL                                                   'var_dump'
          9        INIT_FCALL                                                   'filter_var'
         10        SEND_VAL                                                     <true>
         11        SEND_VAL                                                     257
         12        DO_ICALL                                             $2      
         13        SEND_VAR                                                     $2
         14        DO_ICALL                                                     
   14    15        INIT_FCALL                                                   'var_dump'
         16        INIT_FCALL                                                   'filter_var'
         17        SEND_VAL                                                     1
         18        SEND_VAL                                                     257
         19        DO_ICALL                                             $4      
         20        SEND_VAR                                                     $4
         21        DO_ICALL                                                     
   15    22        INIT_FCALL                                                   'var_dump'
         23        INIT_FCALL                                                   'filter_var'
         24        NEW                                                  $6      'NotAnInt'
         25        DO_FCALL                                          0          
         26        SEND_VAR                                                     $6
         27        SEND_VAL                                                     257
         28        DO_ICALL                                             $8      
         29        SEND_VAR                                                     $8
         30        DO_ICALL                                                     
         31      > RETURN                                                       1

Class NotAnInt:
Function __tostring:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ObLpV
function name:  __toString
number of ops:  3
compiled vars:  none
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    5     0  E > > RETURN                                                       '++1'
    6     1*       VERIFY_RETURN_TYPE                                           
          2*     > RETURN                                                       null

End of function __tostring

End of class NotAnInt.

Generated using Vulcan Logic Dumper, using php 8.5.0


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