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<?php var_dump(true === !preg_match('/[^a-z_\-0-9]/i', 'dani'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/GP7qr
function name:  (null)
number of ops:  10
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'preg_match'
          2        SEND_VAL                                                 '%2F%5B%5Ea-z_%5C-0-9%5D%2Fi'
          3        SEND_VAL                                                 'dani'
          4        DO_ICALL                                         $0      
          5        BOOL_NOT                                         ~1      $0
          6        TYPE_CHECK                                    8  ~2      ~1
          7        SEND_VAL                                                 ~2
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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