Php webpage code conversion problems

Php webpage encoding conversion problem! My website content is collected from other sites. Previously, the content of the source website was encoded as big5. I used a function to convert traditional Chinese to simplified Chinese. Now the source website is upgraded and the encoding format is converted to UTF-8. all the content I collected is garbled. Ask experts to help solve this problem. I found this file in the background Directory, big5-gb.table about traditional php web page encoding conversion problem!
My website content is collected from other sites.

Previously, the content of the source website was encoded as big5. I used a function to convert traditional Chinese to simplified Chinese.

Now the source website is upgraded and the encoding format is converted to UTF-8. all the content I collected is garbled.

Ask experts to help solve this problem.

I found this file in the background directory, the big5-gb.table is probably the traditional conversion using this file. I can't open it because it is garbled inside.

I want to find a table file that converts UTF-8 to big5, and I will replace it directly. You should be able to get what you want.

My QQ 1872 32958

I have full permission to help me solve this garbled problem. I pay 500 for it.

The collection code does not need to be changed. all fields can be collected, that is, all collected fields are garbled.

Only modify the encoding. thank you!

------ Solution --------------------
You find a unicode-big5.table code table to convert the UTF-8 into big5