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<?php preg_mathc('[^a-z\\d_]', strtolower('bug-fix'), $m); var_dump($m);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/67iek
function name:  (null)
number of ops:  12
compiled vars:  !0 = $m
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL_BY_NAME                                       'preg_mathc'
          1        SEND_VAL_EX                                              '%5B%5Ea-z%5Cd_%5D'
          2        INIT_FCALL                                               'strtolower'
          3        SEND_VAL                                                 'bug-fix'
          4        DO_ICALL                                         $1      
          5        SEND_VAR_NO_REF_EX                                       $1
          6        SEND_VAR_EX                                              !0
          7        DO_FCALL                                      0          
    3     8        INIT_FCALL                                               'var_dump'
          9        SEND_VAR                                                 !0
         10        DO_ICALL                                                 
         11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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