AMF 0: Introduced in Flash Player 6 in 2001 and remained unchanged with the introduction of ActionScript 2.0 in Flash Player 7 and with the release of Flash Player 8.
AMF 3: In Flash Player 9, Action Script 3.0 was introduced. The new data types and language features made possible by these improvements prompted AMF to be updated.
AMFPHP: Is a free open-source PHP implementation of the Action Message Format(AMF).
Programs/Frameworks like AMFPHP/ZendAMF tend to fall back to AMF0 unless it uses a specific AMF3 feature. AMF 3 can pass a lot more things by reference, as well as supports sending a ByteArray and XML objects.
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像 AMFPHP/ZendAMF 这样的程序/框架往往会回退到 AMF0,除非它使用特定的 AMF3 功能。 AMF 3 可以通过引用传递更多内容,并且支持发送 ByteArray 和 XML 对象。
来自规范:
Programs/Frameworks like AMFPHP/ZendAMF tend to fall back to AMF0 unless it uses a specific AMF3 feature. AMF 3 can pass a lot more things by reference, as well as supports sending a ByteArray and XML objects.
From the Specification: