php three ways to download files

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##This article mainly shares with you three ways to download files in php. I hope Can help everyone.

1. Add the file link directly

  下载文件

  下载文件 

      
Result:
      

      

       
The file exists

      
      

      

       ##The file does not exist
       


      
3. The head() and fread() functions output the file directly to the browser
      
Result: Same as the second one
      
Summary:
      
The first and second operations are relatively simple, but they easily expose the real address of the file and are not very secure. The third operation can better save the file. The real address is hidden
      
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