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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();
Output for 8.5.0
Fatal error: Duplicate declaration of static variable $v in /in/7ELQZ on line 5 Stack trace: #0 {main}
Process exited with code 255.
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
Output for 8.3.0 - 8.3.28, 8.4.1 - 8.4.14
Fatal error: Duplicate declaration of static variable $v in /in/7ELQZ on line 5
Process exited with code 255.
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29
$v: init value isset($z): false
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33
$v: changed value isset($z): false
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/7ELQZ on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/7ELQZ on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/7ELQZ on line 3
Process exited with code 255.
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