php语言的底层逻辑实现
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<p>php语言不是靠解释器解释，而是用zend虚拟机，屏蔽来操作系统的区别。</p>
<p>php代码编译成opcode，由zend虚拟机来执行opcode</p>
<p>1.操作系统层面 win/linux/mac</p>
<p>||</p>
<p>2.zend虚拟机（执行opcode）</p>
<p>||</p>
<p>3.zend编译器（PHP-->opcode）</p>
<p></p>
<p> </p>
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