Brief discussion on rules and detailed explanation examples tutorial

The following editor will bring you a detailed explanation of HTML5 tag nesting rules [must read]. The editor thinks it’s pretty good, so I’d like to share it with you now, and give it a reference. In HTML5, the child elements of the element can be block-level elements, which was considered against the rules before. This article will introduce in detail the classification of tag nesting rules of HTML5. Before the emergence of HTML5, elements were often distinguished according to block, inline, and inline-block. In HTML5, elements are no longer distinguished by display attributes, but by content models. Divided into metadata content, sectioning content, heading content, flow content, phrasing content, embedded content, and interactive (interactive content). Elements that do not belong to any one category are said to be penetrating; elements may belong to different categories

1. Parsing tag nesting rules in HTML5

Introduction: The editor below will bring you a detailed explanation of HTML5 tag nesting rules [must read]. The editor thinks it is quite good, so I will share it with you now and give it as a reference

2. XML Development Basics-Detailed Explanation of XML Grammar Rules

Introduction: The syntax rules of XML are very simple and very logical. These rules are easy to learn and easy to use. All XML elements must have closing tags. In HTML, you often see elements without closing tags:

3. Detailed introduction to PHP pseudo-static graphic and text code

Introduction: PHP pseudo-static using apache to implement pseudo-static Step 1 httpdconf to comment Step 2 Change and rewrite Permissions Step 3 Add pseudo-static rules as needed Detailed explanation of rewrite rules Entry-level RewriteRule indexhtml indexphp Novice-level RewriteRule index-a-z0-9html indexphpname1 Advanced-level RewriteRule a-z1-0-91html indexphpname1age2

4. Detailed explanation of ESLint rules (1)

Introduction: Nicholas, the master of the front-end world ESLint, developed by C. Zakas in 2013, greatly facilitates code specification checking of Javascript code. This tool contains more than 200 Javascript coding standards and runs quickly. It is an essential auxiliary tool for almost every front-end project. However, with so many rules, what is the starting point for the design of each rule, and how should we choose the rules that are suitable for our own projects have become new problems. Not long ago, the project I was working on started to require code standards for front-end code, so we sorted out the 230 rules in eslint in detail. I have excerpted some of the more important or special rule columns

5. Detailed explanation of PHP syntax rules

Introduction: 1. Simple syntax rules (delimit variable names with braces, applicable to all versions of PHP): $a = 'flower'; echo "She received some $as" ;; // Invalid; the letter s will be treated as a valid variable name component, but the variable here is $a echo "She received some ${a}s"; // Valid echo "She received som ...

6. Detailed explanation of location matching rules

Introduction::This article mainly introduces the detailed explanation of location matching rules. Students who are interested in PHP tutorials can refer to it.

7. Rules in yii2 Detailed explanation of custom verification rules rules card yii rules techrules

Introduction: rules: Detailed explanation of custom validation rules in rules in yii2: One of the powerful features of yii2 is its Form component, which is both convenient and safe. Some friends feel that after using Yii for a while, it seems to be nothing but "difficult to understand" than TP. The leader arranged for a registration function, but this guy used Baidu's various good form styles, and Baidu's validate verification. I really felt sorry for this guy. Of course, without further ado, our focus is to use ActiveForm and how to implement custom validation rules. Let’s talk about the scenario first: Conditions: ①. There are two fields, A and B

8. phison-up10 mass production tool v1.78.00 Detailed introduction to PHP syntax rules

Introduction: phison-up10 mass production tool v1.78.00: phison-up10 mass production tool v1.78.00 Detailed explanation of PHP syntax rules for entry learning: 1. Simple syntax rules (use Curly braces define variable names, applicable to all versions of PHP): Copy the code as follows: $a ='flower'; echo "She received some $as";// Invalid; the letter s will be regarded as a valid variable name component. But the variable here is $a echo "She received some ${a}s";// effective echo "She received some {$a}s"

9. Detailed explanation of common rules for php curly braces

Introduction: Detailed explanation of common rules for php curly braces

10. Detailed explanation of PHP syntax rules Introductory Learning_PHP Tutorial

#Introduction: Detailed explanation of PHP syntax rules for introductory learning. 1. Simple syntax rules (delimit variable names with braces, applicable to all versions of PHP): Copy the code as follows: $a ='flower'; echo "She received some $as";// Invalid; the letter s will be treated as

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