PHP学习笔记??索引博文
特别之处
虽然由于个人PHP水平有限，但是PHP学习笔记还是有些特别之处。本人专注于IoT领域，所以本学习笔记试图把设备和互联网联系起来，而服务器侧使用的脚本语言正是PHP。PHP学习笔记有以下特点。
【1】 由设备提交表单，而不是浏览器。一般的PHP博文中总是会提到表单，PHP表单提交的方法有两种一种是POST，一种是GET，然后通过HTML脚本写个输入框便可以在浏览器中实验了。但是PHP学习笔记提交表单的并不是浏览器，而是一块STM32开发板。是不是感觉很有意思，STM32开发板有一块网卡??ENC28J60，STM32开发板也有操作系统??RT Thread，STM32开发板也有TCP IP协议栈??LwIP，那么它也就可以上网了。通过这样的方法使得数据可以非常方便的到数据库中。
【2】PHP学习笔记参考Restful风格设计API并试图 建立一套适合设备使用的REST API。本学习笔记将引入Slim框架??一种简单易用的Restful风格PHP框架，并通过一个案例来展示如何使用该框架实现LED设备的控制。
图1 PHP学习笔记实现内容
PHP部分
【 PHP再学习1??cURL表单提交、HTTP请求和响应分析】
【 PHP再学习2??RT Thread + LwIP提交表单】
【 PHP再学习3??RT Thread + LwIP提交表单，文本保存数据】
【 PHP再学习4?? slim框架学习和使用】
【 PHP再学习5??RESTFul框架 远程控制LED】
前端部分
【 前端学习1??Bootstrap jquery ajax】
【 前端学习2??深入ajax和restful】
云端部署
【 物联网学习笔记??京东云擎初体验 部署REST服务】
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Explain different error types in PHP (Notice, Warning, Fatal Error, Parse Error).
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There are four main error types in PHP: 1.Notice: the slightest, will not interrupt the program, such as accessing undefined variables; 2. Warning: serious than Notice, will not terminate the program, such as containing no files; 3. FatalError: the most serious, will terminate the program, such as calling no function; 4. ParseError: syntax error, will prevent the program from being executed, such as forgetting to add the end tag.
PHP and Python: Comparing Two Popular Programming Languages
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Explain secure password hashing in PHP (e.g., password_hash, password_verify). Why not use MD5 or SHA1?
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In PHP, password_hash and password_verify functions should be used to implement secure password hashing, and MD5 or SHA1 should not be used. 1) password_hash generates a hash containing salt values to enhance security. 2) Password_verify verify password and ensure security by comparing hash values. 3) MD5 and SHA1 are vulnerable and lack salt values, and are not suitable for modern password security.
PHP in Action: Real-World Examples and Applications
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What are HTTP request methods (GET, POST, PUT, DELETE, etc.) and when should each be used?
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HTTP request methods include GET, POST, PUT and DELETE, which are used to obtain, submit, update and delete resources respectively. 1. The GET method is used to obtain resources and is suitable for read operations. 2. The POST method is used to submit data and is often used to create new resources. 3. The PUT method is used to update resources and is suitable for complete updates. 4. The DELETE method is used to delete resources and is suitable for deletion operations.
PHP: A Key Language for Web Development
Apr 13, 2025 am 12:08 AM
PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7
How does PHP handle file uploads securely?
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PHP handles file uploads through the $\_FILES variable. The methods to ensure security include: 1. Check upload errors, 2. Verify file type and size, 3. Prevent file overwriting, 4. Move files to a permanent storage location.
Explain the difference between self::, parent::, and static:: in PHP OOP.
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In PHPOOP, self:: refers to the current class, parent:: refers to the parent class, static:: is used for late static binding. 1.self:: is used for static method and constant calls, but does not support late static binding. 2.parent:: is used for subclasses to call parent class methods, and private methods cannot be accessed. 3.static:: supports late static binding, suitable for inheritance and polymorphism, but may affect the readability of the code.
