异常处理 - PHP 异常的finally
在网上看到一些答案是CATCH后要执行代码，但没明白要多了一个呢？想执行在CATCH里执行不行么？ 实际意义在哪里，求实际应用场景
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在网上看到一些答案是CATCH后要执行代码，但没明白要多了一个呢？想执行在CATCH里执行不行么？ 实际意义在哪里，求实际应用场景
finally 使用的意义在于可以在其中处理一些资源的回收等操作。而这些在 catch 中是不方便处理的，特别是在含有多个 catch 段的时候，相同的代码可能需要重复写几次。而且 finally 可以跨越 return 存在，也就是说即使在 catch 或者 try 的代码块中使用 return ，finally 还是会执行，这样就使得实现相同效果的代码量更加少。
实际上就是说无论如何，finally 代码块是总会被执行的，所以也就适用于做些资源的清理和回收操作
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