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<?php preg_match("#[\w-()]#", 'some text');
based on XGnNi
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/OqMP4
function name:  (null)
number of ops:  5
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   INIT_FCALL                                               'preg_match'
         1        SEND_VAL                                                 '%23%5B%5Cw-%28%29%5D%23'
         2        SEND_VAL                                                 'some+text'
         3        DO_ICALL                                                 
         4      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.3.0