Created
November 14, 2014 09:32
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波ダッシュ(U+301C) を PHP で UTF-8 → SJIS-win → UTF-8 とすると、全角チルダ(U+FF5E)になってしまう罠
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| <?php | |
| $code1 = 'FF5E'; /* 全角チルダ */ | |
| $code2 = '301C'; /* 波ダッシュ */ | |
| $char1 = h2bin($code1); | |
| $char2 = h2bin($code2); | |
| var_dump(urlencode($char1)); | |
| var_dump(urlencode($char2)); | |
| $sjis1 = mb_convert_encoding($char1, 'SJIS-win', 'UTF-8'); | |
| $sjis2 = mb_convert_encoding($char2, 'SJIS-win', 'UTF-8'); | |
| var_dump(urlencode($sjis1)); | |
| var_dump(urlencode($sjis2)); | |
| $result1 = mb_convert_encoding($sjis1, 'UTF-8', 'SJIS-win'); | |
| $result2 = mb_convert_encoding($sjis2, 'UTF-8', 'SJIS-win'); | |
| // 両方とも全角チルダになってしまう | |
| var_dump($result1); | |
| var_dump($result2); | |
| var_dump(urlencode($result1)); | |
| var_dump(urlencode($result2)); | |
| /* | |
| 実行結果 | |
| $ php --version | |
| PHP 5.3.3 (cli) (built: Dec 5 2013 07:09:40) | |
| Copyright (c) 1997-2010 The PHP Group | |
| Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies | |
| $ php normalize.php | |
| string(3) "～" | |
| string(3) "～" | |
| string(9) "%EF%BD%9E" | |
| string(9) "%E3%80%9C" | |
| string(6) "%81%60" | |
| string(6) "%81%60" | |
| string(3) "～" | |
| string(3) "～" | |
| string(9) "%EF%BD%9E" | |
| string(9) "%EF%BD%9E" | |
| */ | |
| function h2bin($code) { | |
| $bin = pack('H*', (str_repeat('0', 8 - strlen($code)) . $code)); | |
| $char = mb_convert_encoding($bin, 'UTF-8', 'UTF-32BE'); | |
| var_dump($char); | |
| return $char; | |
| } |
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参考 MS932 と Shift_JIS について
http://www.ne.jp/asahi/yuan-jiu/home/