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SET NAMESを使わない方が良い | プログラムの種 ブログ
Warning: Use of undefined constant user_level - assumed 'user_level' (this will throw an Error in a future version of PHP) in /home/php-seed/www/blog/wp-content/plugins/ultimate-google-analytics/ultimate_ga.php on line 524

SET NAMESを使わない方が良い


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PHPからSET NAMESを使わない方が良い理由と対策まとめ | twk @ ふらっと

MySQL4なサバでは使ったりしてましたが。。

SQLの実行により文字コードが変更されるように思えるが、PHPのMySQL関連の関数で考慮される文字コードは変更されない。このため、エスケープ関数mysql_real_escape_string()等で、必要なエスケープがなされず脆弱性を引き起こすケースがある。

とのこと。mysql_set_charset()のほうを使おう!とのことです。

使いたい文字コードがShift_JISなら
入力文字列が正しい文字コードかチェックして、その上で自前のエスケープ用の関数を通せばOK
文字コードのチェックにはmb_check_encoding()またはmb_convert_encoding()を使えば良い。
自前のエスケープ用の関数では、Shift_JISの x00, n, r, , ‘, ” そして x1a をエスケープすれば良いはず。

これは良い情報ですね。古いPHPでShift_JIS使う時には覚えておこう。

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