Shulou(Shulou.com)06/03 Report--

This article mainly explains "how the php Zend engine executes the code". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how the php Zend engine executes code.

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, I believe you have a better understanding of "how the php Zend engine executes code", you might as well do it in practice! Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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