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PHP中文Captcha(PHP Chinese Captcha)

是否有可用于PHP的验证码显示中文字符但不依赖于JavaScript?


Is there a captcha available for PHP which displays Chinese characters but isn't JavaScript dependent?


原文:https://stackoverflow.com/questions/6042022
更新时间:2023-05-18 06:05

最满意答案

WinForms Button是一个非托管Windows类型的托管包装,它是通过.NET执行P / Invoke的一组Win32 API调用创建和管理的。

在深层次中,按钮订阅了相同的窗口事件循环(如果您愿意,可以使用消息泵),这会驱动您可能在VC ++示例中看到的Win32 API调用。 非托管Windows运行时将事件(如“点击此按钮”)放到事件队列中。 当循环执行时,排队的事件被相关的控件拾取并传播到一个“被管理的”事件中,这是您能够观察它的时间。

从本质上讲,Windows运行时提供了大量的基础设施,而.NET仅提供了一套便利的包装器,使其能够轻松地与笨重的旧Win32库一起工作。

如果您使用Reflector并挖掘ButtonControl来查看.NET代码的结束位置以及非受管Win32调用的开始,那么您可以为自己发现很多。


A WinForms Button is a managed wrapper around the unmanaged Windows type which is created and managed via a set of Win32 API calls that .NET performs P/Invoke on.

Deep down, the button subscribes to the same Window Event Loop (or Message Pump if you prefer) which drives the Win32 API calls you may have seen in VC++ examples. The unmanaged Windows runtime puts events (like "this button has been clicked") onto the event queue. When the loop executes, the queued event is picked up by the relevant control and is propagated into a "managed" event which is when you are able to observe it.

In essence, the Windows runtime is providing much of the infrastructure and .NET only provides a convenient set of wrappers which make it easy to work with the clunky old Win32 libraries.

You can discover a lot of this for yourself if you use Reflector and dig into Button and Control to just see where the .NET code ends and the unmanaged Win32 calls begin.

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