Comprehensive understanding of the basic structure of HTML-HTML Tutorial-php.cn

Comprehensive understanding of the basic structure of HTML

高洛峰

Release： 2017-02-11 14:49:56

Original

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HTML Introduction

HyperText Markup Language: Hypertext Markup Language

HyperText: Hypertext (text + image + video + audio + link)

Markup Language: markup Language

Three major elements of the website

Pictures, hyperlinks, text

HTML basic structure

<html>  
    <head>  
        <title>Document</title>  
    </head>  
    <body>  
        I am mossbaoo !   
    </body>  
</html>

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HTML tags of standard web pages

1.HTML document declaration:

2. Page title: ~

3. Page encoding:

utf-8 is a multi-language encoding (recommended)

gb2312 is a simplified Chinese encoding

4. Page keywords ：

Main content of the page:

Note: The meta tag is an auxiliary tag in the HTML language. It is usually used to optimize search engines. It is located at the head of the HTML document.

Generate the initial structure of the HTML document

1. The standard structure of HTML5: html:5+Tab key or !+Tab key

The generated result is as follows

<!DOCTYPE html>  
<html lang="en">  
<head>  
    <meta charset="UTF-8">  
    <title>Document</title>  
</head>  
<body>  
       
</body>  
</html>

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2. Transitional structure of HTML4: html:xt+Tab key

The generated result is as follows

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">  
<head>  
    <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">  
    <title>Document</title>  
</head>  
<body>  
       
</body>  
</html>

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Notes on HTML tags:

• HTML elements consist of a start tag and an end tag Label composition.

• The text located in the opening and closing tags is the content of the element.

• HTML tags must have a beginning and an end. If it is a tag with no content (empty tag), use /> to end it.

• Tag names are not case-sensitive, but in XHTML tag names must be lowercase.

• Tags have attributes, which are used to represent the nature and characteristics of the tag. Attributes are specified in the opening tag.

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