英文回答：
The execution process of the PHP process follows four basic phases of meta—analysis, syntax analysis,pilation and implementation. At the grammatical analysis stage, codes are divided according to the syntax rules, resulting in various types of identifiers, keywords, operators, etc., followed by a syntax analysis whereby these identifiers are grouped into specific phrases and expressions according to the syntax rules. The code is converted into bytes or machine code at thepilation stage to achieveputer understanding and implementation. In the final implementation phase, theputer will execute the converted code by line andplete the corresponding operation. These four phases constitute the PHP process of implementation and meet the objective requirements and specifications of the programme design.
PHP程序的执行流程遵循词法分析、语法分析、编译、执行四个基本阶段。在词法分析阶段，代码按照语法规则进行分割，形成各类标识符、关键字、运算符等；随后进行语法分析，将这些标识符按照语法规则组合成具体的语句和表达式。编译阶段将代码转换成字节码或机器码，
以实现计算机的理解和执行。最终的执行阶段中，计算机将逐行执行转换后的代码，完成相应的操作。这四个阶段构成了PHP程序的执行流程，符合程序设计的客观要求和规范。
When users access web pages with PHP codes, the server hands over these PHP codes to the PHP interpreter. The PHP interpreter implements four phases in sequence, turns the code into an enforceablemand and returns the results of the operation to the user. In the course of implementation, concepts such as variables, functions and objects in PHP are dealt with accordingly, such as the grant of variables, the call of functions and the illustrative of objects. These processes are also part of the PHP process.
当用户访问有PHP代码的网页时，服务器就会把这些PHP代码交给PHP解释器来处理。PHP解释器按部就班地执行四个阶段，把代码变成可执行的命令，然后把运行结果返回给用户。在执行过程中，PHP中的变量、函数和对象等概念也会经过相应的处理，比如变量的赋值、函数的调用以及对象的实例化等。这些处理过程也算是PHP程序执行的一部分。
php实例代码详解The execution process for the PHP program can be summarized as： the source code is converted to a tag stream by word analysis, followed by a syntax analysis to produce a syn
tax tree, the translation process converts the syntax tree to a byte or machine code, and ultimately to aputer—enabledmand during the execution phase. This process demonstrates the overall PHP code implementation process and is important for understanding the PHP process.
PHP程序的执行流程可概括为：源代码经过词法分析转换成标记流，随后经过语法分析生成语法树，编译过程将语法树转换成字节码或机器码，最终在执行阶段将字节码或机器码转换成计算机可执行的命令。此过程展现了PHP代码的整体执行流程，对于理解PHP程序的执行过程具有重要意义。

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