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<?php var_dump(@preg_match('foobar', 'a')); var_dump(@preg_match('/foobar', 'a')); var_dump(@preg_match('/fo(obar/', 'a')); var_dump(@preg_match('/foobar/', 'a'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/AVp1Y
function name:  (null)
number of ops:  37
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'var_dump'
          1        BEGIN_SILENCE                                    ~0      
          2        INIT_FCALL                                               'preg_match'
          3        SEND_VAL                                                 'foobar'
          4        SEND_VAL                                                 'a'
          5        DO_ICALL                                         $1      
          6        END_SILENCE                                              ~0
          7        SEND_VAR                                                 $1
          8        DO_ICALL                                                 
    4     9        INIT_FCALL                                               'var_dump'
         10        BEGIN_SILENCE                                    ~3      
         11        INIT_FCALL                                               'preg_match'
         12        SEND_VAL                                                 '%2Ffoobar'
         13        SEND_VAL                                                 'a'
         14        DO_ICALL                                         $4      
         15        END_SILENCE                                              ~3
         16        SEND_VAR                                                 $4
         17        DO_ICALL                                                 
    5    18        INIT_FCALL                                               'var_dump'
         19        BEGIN_SILENCE                                    ~6      
         20        INIT_FCALL                                               'preg_match'
         21        SEND_VAL                                                 '%2Ffo%28obar%2F'
         22        SEND_VAL                                                 'a'
         23        DO_ICALL                                         $7      
         24        END_SILENCE                                              ~6
         25        SEND_VAR                                                 $7
         26        DO_ICALL                                                 
    6    27        INIT_FCALL                                               'var_dump'
         28        BEGIN_SILENCE                                    ~9      
         29        INIT_FCALL                                               'preg_match'
         30        SEND_VAL                                                 '%2Ffoobar%2F'
         31        SEND_VAL                                                 'a'
         32        DO_ICALL                                         $10     
         33        END_SILENCE                                              ~9
         34        SEND_VAR                                                 $10
         35        DO_ICALL                                                 
         36      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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