好像是说 如果是文件就写入 不是就不写入 ，能简单的解释吗？还有原理，如果用if else 我是懂的，但是在我眼里平常用|| 和 && 就是判断用的 || 就是谁或者谁一个符合就可以， && 就是必须俩个都符合 这种精妙的写法-。-能讲解下吗 谢谢大神们
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好像是说 如果是文件就写入 不是就不写入 ，能简单的解释吗？还有原理，如果用if else 我是懂的，但是在我眼里平常用|| 和 && 就是判断用的 || 就是谁或者谁一个符合就可以， && 就是必须俩个都符合 这种精妙的写法-。-能讲解下吗 谢谢大神们
短路特性。判断a || b这个值的时候，如果a是true，就不会执行b了。如果a是false，就会执行b。
同上，补充一下:第一行，判断userPath是否是一个文件，如果是，然后直接执行下一行代码；如果userPath不是一个文件，那就执行||后的file_put_contents，把用户配置项写入进userPath;为什么非要这么做呢？因为下一行要引入这个userPath的文件
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