Shulou(Shulou.com)05/31 Report--

This article mainly introduces "how the Zend engine of php executes the code". In the daily operation, I believe that many people have doubts about how the Zend engine of php executes the code. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubt of "how the Zend engine of php executes the code". Next, please follow the editor to study!

1. Carry on the lexical analysis of Scanning and convert the PHP code into language fragments.

2. Parse Parsing and convert Tokens into simple and meaningful expressions.

3. Compile Compilation to Opcode.

4. Execute Execution and Opcode sequentially.

One at a time to achieve the function of PHP code expression.

Example

Struct _ zend_op {const void * handler; / / C language function corresponding to execution, that is, each opcode has a C function processing znode_op op1; / / Operand 1 znode_op op2; / / Operand 2 znode_op result; / / return value uint32_t extended_value; uint32_t lineno; zend_uchar opcode; / / opcode instruction zend_uchar op1_type / / Operand 1 type zend_uchar op2_type; / / Operand 2 type zend_uchar result_type; / / return value type}; at this point, the study on "how the Zend engine of php executes the code" is over, hoping to solve everyone's doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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