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<?php $v = 'init value';// あらかじめ外で変数を用意して $fn = function() use ($v) {// use することでクロージャ内で使えるようにすると if (false) { static $v = 'changed value';// ここの変数宣言が何故か有効になって $v の値が書き換わる static $z = 'undefined';// こっちはちゃんと無効化されて、$zは未定義変数のまま echo 'ここは走らない'; } echo ' $v: '.$v ."\n"; echo 'isset($z): '. var_export(isset($z), true) ."\n"; }; $fn();
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/7ELQZ
function name:  (null)
number of ops:  7
compiled vars:  !0 = $v, !1 = $fn
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 'init+value'
    3     1        DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2F7ELQZ%3A3%240'
          2        BIND_LEXICAL                                             ~3, !0
          3        ASSIGN                                                   !1, ~3
   13     4        INIT_DYNAMIC_CALL                                        !1
          5        DO_FCALL                                      0          
          6      > RETURN                                                   1

Function %00%7Bclosure%7D%2Fin%2F7ELQZ%3A3%240:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 2, Position 2 = 5
Branch analysis from position: 2
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 5
filename:       /in/7ELQZ
function name:  {closure}
number of ops:  17
compiled vars:  !0 = $v, !1 = $z
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   BIND_STATIC                                              !0
    4     1      > JMPZ                                                     <false>, ->5
    5     2    >   BIND_STATIC                                              !0
    6     3        BIND_STATIC                                              !1
    7     4        ECHO                                                     '%E3%81%93%E3%81%93%E3%81%AF%E8%B5%B0%E3%82%89%E3%81%AA%E3%81%84'
    9     5    >   CONCAT                                           ~2      '+++++++%24v%3A+', !0
          6        CONCAT                                           ~3      ~2, '%0A'
          7        ECHO                                                     ~3
   10     8        INIT_FCALL                                               'var_export'
          9        ISSET_ISEMPTY_CV                                 ~4      !1
         10        SEND_VAL                                                 ~4
         11        SEND_VAL                                                 <true>
         12        DO_ICALL                                         $5      
         13        CONCAT                                           ~6      'isset%28%24z%29%3A+', $5
         14        CONCAT                                           ~7      ~6, '%0A'
         15        ECHO                                                     ~7
   11    16      > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2F7ELQZ%3A3%240

Generated using Vulcan Logic Dumper, using php 8.0.0


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