What is Zend Engine?
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Zend Engine is used internally by PHP as a compiler and runtime engine. PHP Scripts are loaded into memory and compiled into Zend OPCodes.
These OPCodes are executed and the HTML generated is sent to the client.
The Zend Engine provides memory and resource management and other standard services for the PHP language. Its performance, reliability, and extensibility have played a significant role in PHP’s increasing popularity.
Zend engine is like a virtual machine and is open-source, and is known for its role in automating the web using PHP. Zend is named after its developers Zeev and Aandi.
The Zend Engine II is the heart of PHP 5. It is an open-source project and freely available under a BSD-style license.
The Zend engine is a collection of components that combine to form PHP. The Zend Virtual Machine, which is made up of the Zend Compiler and Zend Executor components, is the most crucial Zend engine component. In this category, we may also include the OPCache Zend extension. Those three components comprise the beating heart (or brain, depending on your point of view), and they are the most intricate elements of the PHP source code.
