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Fatal Error "opcache.preload_user" has not been defined

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問題

opcache を有効にしてアクセスすると次のエラーが発生しました。

Fatal Error "opcache.preload_user" has not been defined

原因

root ユーザーでプリロードするのは、セキュリティ上の理由から禁止されているそうです。

対策

php.ini に下記の設定を追記

php.ini
opcache.preload_user = www-data

opcache.preload_user はPHP7.4から追加されたそうです。

参考

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