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<?php $a="a / b"; $a=preg_replace('/\//','\\',$a); echo "First version: {$a}\n"; $a=preg_replace('/\//','\\\\',$a); echo "Second version: {$a}\n"; ?>
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/C361B
function name:  (null)
number of ops:  22
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 'a+%2F+b'
    3     1        INIT_FCALL                                               'preg_replace'
          2        SEND_VAL                                                 '%2F%5C%2F%2F'
          3        SEND_VAL                                                 '%5C'
          4        SEND_VAR                                                 !0
          5        DO_ICALL                                         $2      
          6        ASSIGN                                                   !0, $2
    4     7        ROPE_INIT                                     3  ~5      'First+version%3A+'
          8        ROPE_ADD                                      1  ~5      ~5, !0
          9        ROPE_END                                      2  ~4      ~5, '%0A'
         10        ECHO                                                     ~4
    5    11        INIT_FCALL                                               'preg_replace'
         12        SEND_VAL                                                 '%2F%5C%2F%2F'
         13        SEND_VAL                                                 '%5C%5C'
         14        SEND_VAR                                                 !0
         15        DO_ICALL                                         $7      
         16        ASSIGN                                                   !0, $7
    6    17        ROPE_INIT                                     3  ~10     'Second+version%3A+'
         18        ROPE_ADD                                      1  ~10     ~10, !0
         19        ROPE_END                                      2  ~9      ~10, '%0A'
         20        ECHO                                                     ~9
    7    21      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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