What is the reason why Chinese garbled characters appear when PHP reads the database? (Solution Sharing)

When using PHP to read the database, encountering Chinese garbled characters is a common problem. There are many reasons for this problem. Let’s discuss how to solve this problem.

1. Incorrect database encoding settings

In the MySQL database, encoding settings are very important. If the encoding setting of the database is incorrect, the problem of Chinese garbled characters may occur. MySQL supports multiple character sets, such as utf8, gbk, etc. When creating a data table, the correct character set must be set. If the character set of a certain table is inconsistent with the character set used by the PHP script or user-entered data, garbled characters will occur.

Solution: When creating a data table, use the correct character set. Generally speaking, utf8 is the most common character set. When setting up the connection, also specify the character set explicitly.

2. Incorrect PHP environment encoding settings

In the PHP environment, encoding settings are equally important. If the PHP environment is not coded correctly, garbled Chinese characters may appear. In PHP, character encoding issues can be handled correctly through the mbstring module, iconv module, etc.

Solution: You need to make relevant settings in the PHP configuration file php.ini to ensure that the character set in the PHP environment is consistent with the database settings.

3. Incorrect PHP program coding

When writing PHP programs, it is also easy to encounter the problem of Chinese garbled characters. When writing PHP programs, pay attention to PHP's variable types. Different variable types handle Chinese characters differently. In PHP programs, character encodings can be converted through functions such as iconv.

Solution: Use PHP's built-in character encoding functions, such as iconv, mb_convert_encoding, urlencode and other functions, to ensure that the character encoding in the PHP program is consistent with the database settings.

4. Character set transcoding error

When using PHP to read the database, during the character set transcoding process, functions such as iconv are used incorrectly, and It may cause garbled Chinese characters. Especially when transcoding between different systems, problems are more likely to arise.

Solution: When transcoding the character set, select the appropriate transcoding method and strictly follow the transcoding method.

Summary

The problem of Chinese garbled characters is a very common problem. In order to avoid this problem, settings and adjustments need to be made in the database, PHP environment, PHP program encoding, character set transcoding, etc. With the correct method, you can avoid this problem.

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