How to set the Chinese character set in php

When developing PHP programs, we often encounter the situation of dealing with Chinese character sets. Since the Chinese character set is different from the English character set, special attention needs to be paid when processing the Chinese character set. Next, this article will introduce you how to set the Chinese character set in PHP.

1. The basic concept of character set

Character Set (Character Set), also called encoding set (Encoding), refers to a character set and the encoding corresponding to each character in the set. . The character set contains several characters, and each character corresponds to a coded value. These coded values ​​are stored in the computer in binary form.

2. Characteristics of the Chinese character set

The Chinese character set is more complex than the English character set and has the following characteristics:

1. The Chinese character set contains more characters.
2. The encoding methods of Chinese character sets are relatively diverse.
3. The encoding method of Chinese character set adopts multi-byte encoding method.
4. There are some escape characters in the Chinese character set.

3. How to set the Chinese character set in PHP

In PHP, you can set the Chinese character set through the following methods:

1. Use characters Set function

PHP provides multiple character set functions through which character sets can be set. The most commonly used character set functions include:

① mb_internal_encoding($encoding): used to set PHP’s internal character encoding.

② mb_convert_encoding($str,$to_encoding,$from_encoding): Used to convert a character into another character encoding.

For example, to set PHP's internal encoding to UTF-8, you can use the following code:

mb_internal_encoding("UTF-8");

2. Set HTTP Header information

When building a web application using PHP, you can set the character set by setting HTTP header information. The specific method is to add the following code at the beginning of the program:

header("Content-type:text/html;charset=utf-8");

where Content-type represents HTTP The content type in the header information, text/html refers to the type of Web page, and charset=utf-8 represents the character set of the page.

3. Add meta tags in HTML

In addition to setting the character set in the HTTP header information, you can also add meta tags to the HTML document to set the character set. The specific method is to add the following code to the head of the HTML document:

Among them, http-equiv means to define the meta tag in the form of HTTP header information, Content-Type means the type of document, and charset=utf-8 means the character set of the document.

4. Summary

The above is how to set the Chinese character set in PHP. In actual development, in order to avoid problems caused by Chinese character processing, we should try to use the UTF-8 character set for development, which can ensure compatibility and internationalization requirements. At the same time, you should also follow good development habits and try to avoid problems such as mixing Chinese and English, and inconsistent coding formats.

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