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<?php $str = 'floor2'; echo preg_replace('@(bcsqrt|bcpow|round|ceil|floor)\K|[^0-9.()+-/*%^:]@', '', $str);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/NcNuV
function name:  (null)
number of ops:  8
compiled vars:  !0 = $str
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 'floor2'
    3     1        INIT_FCALL                                               'preg_replace'
          2        SEND_VAL                                                 '%40%28bcsqrt%7Cbcpow%7Cround%7Cceil%7Cfloor%29%5CK%7C%5B%5E0-9.%28%29%2B-%2F%2A%25%5E%3A%5D%40'
          3        SEND_VAL                                                 ''
          4        SEND_VAR                                                 !0
          5        DO_ICALL                                         $2      
          6        ECHO                                                     $2
          7      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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