PHP is garbled after uploading documents

PHP is garbled after uploading files. all my PHP pages are: after GB2312 is uploaded, the Chinese character values uploaded to the database are garbled. Number: (for example, 9/1/3/9) check the encoding format of the table in the database and the encoding format of the field storing the uploaded file name. In addition, if both are correct, then let's look at the garbled characters after you operate on the PHP file uploaded by the mysql client.
For example, all my PHP pages are GB2312

After uploading, the Chinese character values uploaded to the database are garbled. Number: (for example, 9/1/3/9)




Please solve

------ Solution --------------------
Check the encoding format of the table in the database and the encoding format of the field storing the uploaded file name,
In addition, if both are correct,
Let's take a look at the formats supported by your operations on the mysql client. it is best to use set names to encode the submitted SQL statement!
------ Solution --------------------
Use UTF-8 is the best!
------ Solution --------------------
What is the encoding problem in your database?
During website creation, the project and database encoding must be unified. Avoid extra trouble
------ Solution --------------------
Agree upstairs
Use set name