How can we avoid chaos in other countries?

How can we avoid chaos in foreign space? I uploaded a simple htm page to display the space normally without garbled characters. However, if you upload other files, they will be garbled. I made a comparison and posted the code to you: index.htm: PHPcode & lt ;! DOCTYPEHTMLPUBLIC & quot;-W3CDTDHTML4.01TransitionalEN & quot; how can this problem be solved?
I uploaded a simple htm page to display the space normally without garbled characters.
However, if you upload other files, they will be garbled. I made a comparison and posted the code to you:

Index.htm:

PHP code

Address: http://link.kilu.net/index.htm

However, after uploading an image system, it is completely garbled and cannot be installed. paste the following code:

PHP code

   
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