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最近维护一份前人写的 PHP 代码，看的人头疼。
source link: https://www.v2ex.com/t/456321
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程序员 - @jojojo - 一个查询系统，用户查询和后台管理分两个系统，一个用 lavarel，一个用 ci 框架，当然，这些都不重要，给大家看一下大神的代码：```php $ip = real_ip();
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