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<?php $text = "Line <br> Line <br> Line <br> Line <br> Line <br> Line <br>"; $replace = array("1", "2", "3", "4"); $counter = 0; $text = preg_replace_callback('~<br\s*/?>~', function($m) use($replace, &$counter) { if ($counter === count($replace)) { $counter = 0; } return $replace[$counter++]; }, $text); echo $text;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/kdgra
function name:  (null)
number of ops:  14
compiled vars:  !0 = $text, !1 = $replace, !2 = $counter
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'Line+%3Cbr%3E+Line+%3Cbr%3E+Line+%3Cbr%3E+Line+%3Cbr%3E+Line+%3Cbr%3E+Line+%3Cbr%3E'
    4     1        ASSIGN                                                   !1, <array>
    5     2        ASSIGN                                                   !2, 0
    6     3        INIT_FCALL                                               'preg_replace_callback'
          4        SEND_VAL                                                 '%7E%3Cbr%5Cs%2A%2F%3F%3E%7E'
          5        DECLARE_LAMBDA_FUNCTION                          ~6      [0]
          6        BIND_LEXICAL                                             ~6, !1
          7        BIND_LEXICAL                                             ~6, !2
    9     8        SEND_VAL                                                 ~6
          9        SEND_VAR                                                 !0
    6    10        DO_ICALL                                         $7      
         11        ASSIGN                                                   !0, $7
   10    12        ECHO                                                     !0
   11    13      > RETURN                                                   1


Dynamic Functions:
Dynamic Function 0
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 6, Position 2 = 7
Branch analysis from position: 6
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 7
filename:       /in/kdgra
function name:  {closure}
number of ops:  11
compiled vars:  !0 = $m, !1 = $replace, !2 = $counter
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    6     0  E >   RECV                                             !0      
          1        BIND_STATIC                                              !1
          2        BIND_STATIC                                              !2
    7     3        COUNT                                            ~3      !1
          4        IS_IDENTICAL                                             !2, ~3
          5      > JMPZ                                                     ~4, ->7
          6    >   ASSIGN                                                   !2, 0
    8     7    >   POST_INC                                         ~6      !2
          8        FETCH_DIM_R                                      ~7      !1, ~6
          9      > RETURN                                                   ~7
    9    10*     > RETURN                                                   null

End of Dynamic Function 0

Generated using Vulcan Logic Dumper, using php 8.0.0


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