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<?php echo preg_replace_callback( '/^.|.\K./', fn() => rand(0,9), '1234567' ); echo "\n---\n"; echo preg_replace_callback( '/.\K./', fn() => rand(0,9), '1234567' );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/SI7i4
function name:  (null)
number of ops:  16
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'preg_replace_callback'
    4     1        SEND_VAL                                                 '%2F%5E.%7C.%5CK.%2F'
    5     2        DECLARE_LAMBDA_FUNCTION                          ~0      [0]
          3        SEND_VAL                                                 ~0
    6     4        SEND_VAL                                                 '1234567'
    3     5        DO_ICALL                                         $1      
    6     6        ECHO                                                     $1
    9     7        ECHO                                                     '%0A---%0A'
   11     8        INIT_FCALL                                               'preg_replace_callback'
   12     9        SEND_VAL                                                 '%2F.%5CK.%2F'
   13    10        DECLARE_LAMBDA_FUNCTION                          ~2      [1]
         11        SEND_VAL                                                 ~2
   14    12        SEND_VAL                                                 '1234567'
   11    13        DO_ICALL                                         $3      
   14    14        ECHO                                                     $3
   15    15      > RETURN                                                   1


Dynamic Functions:
Dynamic Function 0
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/SI7i4
function name:  {closure}
number of ops:  6
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   INIT_FCALL                                               'rand'
          1        SEND_VAL                                                 0
          2        SEND_VAL                                                 9
          3        DO_ICALL                                         $0      
          4      > RETURN                                                   $0
          5*     > RETURN                                                   null

End of Dynamic Function 0

Dynamic Function 1
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/SI7i4
function name:  {closure}
number of ops:  6
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   13     0  E >   INIT_FCALL                                               'rand'
          1        SEND_VAL                                                 0
          2        SEND_VAL                                                 9
          3        DO_ICALL                                         $0      
          4      > RETURN                                                   $0
          5*     > RETURN                                                   null

End of Dynamic Function 1

Generated using Vulcan Logic Dumper, using php 8.0.0


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