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<?php echo "\n** warning about bad pattern AND bad parameter: **\n"; var_dump(preg_match('bad pattern', null)); echo "\n** warning about bad pattern only: **\n"; var_dump(preg_match('bad pattern', '')); echo "\n** suppressed warnings: **\n"; var_dump(@preg_match('bad pattern', ''));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/5YI6t
function name:  (null)
number of ops:  27
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ECHO                                                     '%0A%2A%2A+warning+about+bad+pattern+AND+bad+parameter%3A+%2A%2A%0A'
    4     1        INIT_FCALL                                               'var_dump'
          2        INIT_FCALL                                               'preg_match'
          3        SEND_VAL                                                 'bad+pattern'
          4        SEND_VAL                                                 null
          5        DO_ICALL                                         $0      
          6        SEND_VAR                                                 $0
          7        DO_ICALL                                                 
    6     8        ECHO                                                     '%0A%2A%2A+warning+about+bad+pattern+only%3A+%2A%2A%0A'
    7     9        INIT_FCALL                                               'var_dump'
         10        INIT_FCALL                                               'preg_match'
         11        SEND_VAL                                                 'bad+pattern'
         12        SEND_VAL                                                 ''
         13        DO_ICALL                                         $2      
         14        SEND_VAR                                                 $2
         15        DO_ICALL                                                 
    9    16        ECHO                                                     '%0A%2A%2A+suppressed+warnings%3A+%2A%2A%0A'
   10    17        INIT_FCALL                                               'var_dump'
         18        BEGIN_SILENCE                                    ~4      
         19        INIT_FCALL                                               'preg_match'
         20        SEND_VAL                                                 'bad+pattern'
         21        SEND_VAL                                                 ''
         22        DO_ICALL                                         $5      
         23        END_SILENCE                                              ~4
         24        SEND_VAR                                                 $5
         25        DO_ICALL                                                 
         26      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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