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PHPでファイルの最後の1行だけほしい

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雑にぐぐるだけで、file() で全部読み込んでcountして最後の1行とりにいくような残念なブログが平気で出てきて困るわね

exec('tail -n 1 hoge.txt', $output);
print $output[0];

身も蓋もないんじゃよ

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