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<?php $msg = "1a12v21s1fs4d4"; $txt = "/(1[a-z]+1)|(4[a-z]4)/"; $res = preg_replace($txt,"$1",$msg); echo $res;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/DKiHk
function name:  (null)
number of ops:  10
compiled vars:  !0 = $msg, !1 = $txt, !2 = $res
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, '1a12v21s1fs4d4'
    3     1        ASSIGN                                                   !1, '%2F%281%5Ba-z%5D%2B1%29%7C%284%5Ba-z%5D4%29%2F'
    4     2        INIT_FCALL                                               'preg_replace'
          3        SEND_VAR                                                 !1
          4        SEND_VAL                                                 '%241'
          5        SEND_VAR                                                 !0
          6        DO_ICALL                                         $5      
          7        ASSIGN                                                   !2, $5
    5     8        ECHO                                                     !2
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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