With the development of Internet technology, PHP programming has become an important method for building websites, while HTML5 and CSS3 are necessary tools for building website pages. HTML5 and CSS3 provide more tags and styles to achieve richer page effects. In PHP programming, using HTML5 and CSS3 can make the website more flexible, beautiful and interactive. This article will introduce the common usage methods and techniques of HTML5 and CSS3 in PHP programming.

1. Common HTML5 tags

1. tag: used to represent an independent content block, usually including a title (

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2. Tag: used to represent an article or news report, usually including title, author and other elements.
4. tag: used to represent the top of a page or area, usually including the name of the website, slogan, navigation bar and other elements.

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2. Common CSS3 styles

1. Rounded corner attribute (border-radius): You can turn the corners of elements into rounded corners to make the page look more harmonious. .
2. Shadow attribute (box-shadow): You can add a shadow effect to elements to make the page look more three-dimensional.
3. Gradient attribute (background-gradient): You can set the background of an element to a gradient color. There are three gradient methods: horizontal, vertical and angle.
4. Transition attribute (transition): You can make the element transition from one state to another when the mouse is hovered or clicked, such as from transparency 0 to 1.
5. Animation attribute (animation): You can add animation effects to elements, such as circular rotation, left-to-right translation, etc.
6. Flexible layout attribute (flexbox): It can help developers implement responsive layout more conveniently, so that the page can adapt to different devices.

3. Tips for using HTML5 and CSS3

1. Compatibility issues: Some browsers do not support the new attributes of HTML5 and CSS3, so you need to consider the differences between different browsers Compatibility issues, using appropriate prefixes (such as -webkit-, -moz-) can solve most of the problems.
2. Use semantic tags more: Using semantic tags can make it easier for search engines to understand the content of the website, and it can also make it easier for developers to read and modify the code.
3. Shared styles: In PHP programming, the same style can be defined in a CSS file, allowing different pages to share the same style sheet, reducing code redundancy.
4. Responsive design: With the popularity of mobile devices, responsive design has become a necessary skill. Responsive design can be implemented more concisely using HTML5 and CSS3.
5. Reference excellent cases: When doing PHP programming, you can refer to some excellent websites and learn from their HTML5 and CSS3 skills to improve your design level.

In short, HTML5 and CSS3 are indispensable tools for building website pages. The HTML5 tags and CSS3 styles commonly used in PHP programming are also very practical. Using HTML5 and CSS3 can make the website more beautiful and the user experience more comfortable. Developers need to fully consider factors such as compatibility, semantics, and code simplicity when using HTML5 and CSS3 to obtain the best development results.

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