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http://fleur.hio.jp/perldoc/mix/func/eval.html
sub 内部㧠eval ブãƒãƒƒã‚¯å†…ã‹ã‚‰ç›´æŽ¥ return ã§ããªã„ - daily dayflower
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サービス終了ã®ãŠçŸ¥ã‚‰ã›
PHP: eval - Manual
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