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<?php $fam = "Перегудов"; $s = array("@^.(.)@"); $r = array("*"); echo preg_replace($s, $r, $fam);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/YKY3I
function name:  (null)
number of ops:  10
compiled vars:  !0 = $fam, !1 = $s, !2 = $r
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, '%D0%9F%D0%B5%D1%80%D0%B5%D0%B3%D1%83%D0%B4%D0%BE%D0%B2'
    3     1        ASSIGN                                                   !1, <array>
    4     2        ASSIGN                                                   !2, <array>
    5     3        INIT_FCALL                                               'preg_replace'
          4        SEND_VAR                                                 !1
          5        SEND_VAR                                                 !2
          6        SEND_VAR                                                 !0
          7        DO_ICALL                                         $6      
          8        ECHO                                                     $6
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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