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<?php $msg = 'Your phone number 040783248898 has been sent with a verification code.'; echo preg_replace('/\b\d{8}(?=\d{4}\b)/', '********', $msg);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/CQ1lL
function name:  (null)
number of ops:  8
compiled vars:  !0 = $msg
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'Your+phone+number+040783248898+has+been+sent+with+a+verification+code.'
    5     1        INIT_FCALL                                               'preg_replace'
          2        SEND_VAL                                                 '%2F%5Cb%5Cd%7B8%7D%28%3F%3D%5Cd%7B4%7D%5Cb%29%2F'
          3        SEND_VAL                                                 '%2A%2A%2A%2A%2A%2A%2A%2A'
          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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