How to convert Chinese characters to UTF-8 encoding in php

PHP is a widely used programming language, and Unicode encoding is a global character encoding standard. In PHP, processing Chinese character encoding is a common need. This article will introduce how to convert Chinese characters to UTF-8 encoding.

1. Principle

UTF-8 is a variable-length encoding that can represent all characters in Unicode encoding. In UTF-8 encoding, a character can be 1, 2, 3 or 4 bytes long. Chinese characters are part of Unicode encoding. In UTF-8 encoding, one Chinese character usually occupies 3 bytes.

2. Code

To convert Chinese characters to UTF-8 encoding, you need to use the function mb_convert_encoding() that comes with PHP. This function converts a string from one encoding format to another. The following is a sample code:

$str = "中文";
$str_utf8 = mb_convert_encoding($str, "UTF-8", "auto");
echo $str_utf8;

In the above code, $str is a string containing Chinese characters, and $str_utf8 is the converted UTF-8 encoded string. The first parameter of the function mb_convert_encoding() is the string to be converted, and the second parameter is the target encoding format, here we specify "UTF-8". The third parameter is the source encoding format. Here we specify "auto" to automatically detect the source encoding format.

3. Notes

You need to pay attention to the following points when using the mb_convert_encoding() function:

1. If you want to convert a string from To convert UTF-8 encoding to other encoding formats, the third parameter should be specified as "UTF-8".
2. If you want to convert a string from a certain GB encoding to UTF-8 encoding, the third parameter should be specified as the name of the GB encoding, such as "GBK", "GB2312", etc.
3. Garbled characters may occur when converting encodings. This is usually caused by a mismatch between the source encoding and the target encoding. This problem can be solved by adjusting the source and target encodings.

4. Summary

Converting Chinese character encoding in PHP is a common requirement. Chinese character conversion can be easily achieved by using the mb_convert_encoding() function. Function to encode UTF-8. In practical applications, attention needs to be paid to the matching of source encoding and target encoding to avoid problems such as garbled codes.

The above is the detailed content of How to convert Chinese characters to UTF-8 encoding in php. For more information, please follow other related articles on the PHP Chinese website!