PHP是否有像Java这样的虚拟机?
问题描述：
PHP是否有Java之类的虚拟机?
Does PHP have a virtual machine like Java?
答
是.
与运行PHP的平台无关，这些脚本被编译为相同的字节码，并由Zend Engine运行.
Independently from the platform PHP is running on, the scripts are compiled into the same bytecode and run by the Zend Engine.
与Java的区别在于，该编译后的代码通常不存储在单独的文件中，并且每次执行时都会重新编译脚本(但是，请参阅操作码缓存).
The difference from Java is that this compiled code is usually not stored into separate files and the scripts are re-compiled on each execution (however, see opcode caches).