rar multiple files by php -

I am trying to RR multiple files using exec () in php. (Using the RAR command line)

Sample code:

  exec ("One CommandOpero Rar File.rar File.txt");   
 The above code is to RR a single file, how do multiple files in RAM be used in one line of code?  
 Volume split is possible at a later level.  
 Any advice?  
 P / S: I want to resize multiple files, not folders.   
 
 
 like this:  
  exec ("A command-openers file. Rar file1.txt file2.txt ");   
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