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<?php $string = "Союз Советских Социалистических Республик"; $expr = '/(?<=\s|^)\w/iu'; preg_match_all($expr, $string, $matches); $result = implode('', $matches[0]); echo $result = strtoupper($result);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/4iZ6L
function name:  (null)
number of ops:  16
compiled vars:  !0 = $string, !1 = $expr, !2 = $matches, !3 = $result
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, '%D0%A1%D0%BE%D1%8E%D0%B7+%D0%A1%D0%BE%D0%B2%D0%B5%D1%82%D1%81%D0%BA%D0%B8%D1%85+%D0%A1%D0%BE%D1%86%D0%B8%D0%B0%D0%BB%D0%B8%D1%81%D1%82%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D1%85+%D0%A0%D0%B5%D1%81%D0%BF%D1%83%D0%B1%D0%BB%D0%B8%D0%BA'
    5     1        ASSIGN                                                       !1, '%2F%28%3F%3C%3D%5Cs%7C%5E%29%5Cw%2Fiu'
    6     2        INIT_FCALL                                                   'preg_match_all'
          3        SEND_VAR                                                     !1
          4        SEND_VAR                                                     !0
          5        SEND_REF                                                     !2
          6        DO_ICALL                                                     
    7     7        FETCH_DIM_R                                          ~7      !2, 0
          8        FRAMELESS_ICALL_2                implode             ~8      '', ~7
          9        ASSIGN                                                       !3, ~8
    8    10        INIT_FCALL                                                   'strtoupper'
         11        SEND_VAR                                                     !3
         12        DO_ICALL                                             $10     
         13        ASSIGN                                               ~11     !3, $10
         14        ECHO                                                         ~11
         15      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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