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<?php $str="\0\0\0>fake start"; var_dump($str); echo preg_replace('~\0~', 'N', $str);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/2Sljc
function name:  (null)
number of ops:  11
compiled vars:  !0 = $str
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '%00%00%00%3Efake+start'
    4     1        INIT_FCALL                                               'var_dump'
          2        SEND_VAR                                                 !0
          3        DO_ICALL                                                 
    5     4        INIT_FCALL                                               'preg_replace'
          5        SEND_VAL                                                 '%7E%5C0%7E'
          6        SEND_VAL                                                 'N'
          7        SEND_VAR                                                 !0
          8        DO_ICALL                                         $3      
          9        ECHO                                                     $3
         10      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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