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<?php var_dump(filter_var(true, FILTER_VALIDATE_BOOLEAN)); var_dump(filter_var('true', FILTER_VALIDATE_BOOLEAN)); var_dump(filter_var(false, FILTER_VALIDATE_BOOLEAN)); var_dump(filter_var('false', FILTER_VALIDATE_BOOLEAN));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/lBnqR
function name:  (null)
number of ops:  29
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'filter_var'
          2        SEND_VAL                                                 <true>
          3        SEND_VAL                                                 258
          4        DO_ICALL                                         $0      
          5        SEND_VAR                                                 $0
          6        DO_ICALL                                                 
    4     7        INIT_FCALL                                               'var_dump'
          8        INIT_FCALL                                               'filter_var'
          9        SEND_VAL                                                 'true'
         10        SEND_VAL                                                 258
         11        DO_ICALL                                         $2      
         12        SEND_VAR                                                 $2
         13        DO_ICALL                                                 
    5    14        INIT_FCALL                                               'var_dump'
         15        INIT_FCALL                                               'filter_var'
         16        SEND_VAL                                                 <false>
         17        SEND_VAL                                                 258
         18        DO_ICALL                                         $4      
         19        SEND_VAR                                                 $4
         20        DO_ICALL                                                 
    6    21        INIT_FCALL                                               'var_dump'
         22        INIT_FCALL                                               'filter_var'
         23        SEND_VAL                                                 'false'
         24        SEND_VAL                                                 258
         25        DO_ICALL                                         $6      
         26        SEND_VAR                                                 $6
         27        DO_ICALL                                                 
         28      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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