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<?php var_dump(mb_ereg_replace('\s*(?<word>\w+)\s*', "_\k<word>_\k'word'_", ' foo '));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/1qDWQ
function name:  (null)
number of ops:  9
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'mb_ereg_replace'
          2        SEND_VAL                                                 '%5Cs%2A%28%3F%3Cword%3E%5Cw%2B%29%5Cs%2A'
          3        SEND_VAL                                                 '_%5Ck%3Cword%3E_%5Ck%27word%27_'
          4        SEND_VAL                                                 '+foo+'
          5        DO_ICALL                                         $0      
          6        SEND_VAR                                                 $0
          7        DO_ICALL                                                 
          8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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