QM项目开发文档收拾
QM项目开发文档整理
QM项目开发文档整理
前言
在W公司工作4个多月,庆幸接触到的全是“硬”项目,真枪实干,技术、经验、能力都得到了很大提升。
QM项目
此项目WEB前端学到的东西很多,对PHP项目的架构设计、MVC框架有了更深的认识。
CSS知识汇总
垂直对齐一幅图像,可用vertical-align属性,如:
<code>img{ vertical-align:text-top;}</code>
对于浮动元素记得清除浮动,清除浮动的通用代码如下,高级浏览器可使用after伪类:
<code>.c,.fix:after{ clear:both; display:block; margin:0; padding:0; height:0; overflow:hidden; content:'.'}.fix{ zoom:1}</code>
display: inline-block 将对象呈递为内联对象,但是对象的内容作为块对象呈递。旁边的内联对象会被呈递在同一行内,允许空格。所以对于像三张图片横排的需求,可以如此定义,并加IE hack解决兼容性问题:
<code>.div{ display: inline-block; *display: inline;}</code>
MYSQL知识汇总
MYSQL从指定位置开始取数据
<code>SELECT * FROM 表 LIMIT 0, 10;</code>
说明如下:
- LIMIT 接受一个或两个数字参数。
- 参数必须是一个整数常量。
- 如果给定两个参数,第一个参数指定第一个返回记录行的偏移量,
- 第二个参数指定返回记录行的最大数目。
- 初始记录行的偏移量是 0(而不是 1)
INSET INTO用于向表中插入数据,格式如下:
<code>INSERT INTO table_name (列1, 列2,...) VALUES (值1, 值2,....);</code>
PHP知识汇总
PHP时间戳与date格式转换
-
输出PHP时间戳:
<code>echo time();</code>
Copy after login -
普通日期输出:
<code>echo date('Y-m-d');//输出类似2015-04-04</code>
Copy after login -
PHP时间戳转成普通日期形式:
<code>$date=date('Y-m-d',"1285724523"); echo $date; </code>
Copy after login -
PHP日期转时间戳:
<code>$date=date('Y-m-d',"1285724523"); $temp=explode("-",$date); echo mktime(0,0,0,$temp[1],$temp[2],$temp[0]); </code>
Copy after login
JS
JS上对JQuery产生了莫名的好感与依赖,整理一个JQuery焦点图特效的网址:
http://sc.chinaz.com/jiaoben/jiaodiantu.html

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JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

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

In PHP8, match expressions are a new control structure that returns different results based on the value of the expression. 1) It is similar to a switch statement, but returns a value instead of an execution statement block. 2) The match expression is strictly compared (===), which improves security. 3) It avoids possible break omissions in switch statements and enhances the simplicity and readability of the code.
