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<?php echo (int)!preg_match('/[^a-z0-9:;,!\'\s*.?()"-]/im', '@3'); //проверка отсуствия разрешенных символов echo (int)!preg_match('/^[^a-z0-9:;,!\'\s*.?()"-]$/im', '@3'); //проверка наличия запрещенных символов
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/BE4gl
function name:  (null)
number of ops:  15
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                               'preg_match'
          1        SEND_VAL                                                 '%2F%5B%5Ea-z0-9%3A%3B%2C%21%27%5Cs%2A.%3F%28%29%22-%5D%2Fim'
          2        SEND_VAL                                                 '%403'
          3        DO_ICALL                                         $0      
          4        BOOL_NOT                                         ~1      $0
          5        CAST                                          4  ~2      ~1
          6        ECHO                                                     ~2
    3     7        INIT_FCALL                                               'preg_match'
          8        SEND_VAL                                                 '%2F%5E%5B%5Ea-z0-9%3A%3B%2C%21%27%5Cs%2A.%3F%28%29%22-%5D%24%2Fim'
          9        SEND_VAL                                                 '%403'
         10        DO_ICALL                                         $3      
         11        BOOL_NOT                                         ~4      $3
         12        CAST                                          4  ~5      ~4
         13        ECHO                                                     ~5
         14      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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