How to use php to add an existing zip file to the server

How to use php to add a file to an existing zip file on the server. Note that the file is not generated. add a file without unlocking the zip file on the server. What should I do ., Add a zip module as follows: & lt ;? Php $ zip = newZipArchive (); $ filename = & quot;./test1 how to use php to add a file to an existing zip file on the server
Note that you do not need to generate a zip file. add a file without unlocking the server zip file. What should I do.

------ Solution --------------------
Add a zip module
The usage is as follows:

$ Zip = new ZipArchive ();
$ Filename = "./test112.zip ";

If ($ zip-> open ($ filename, ZIPARCHIVE: CREATE )! = TRUE ){
Exit ("cannot open <$ filename> \ n ");
}

$ Zip-> addFromString ("testfilephp.txt". time (), "#1 This is a test string added as testfilephp.txt. \ n ");
$ Zip-> addFromString ("testfilephp2.txt". time (), "#2 This is a test string added as testfilephp2.txt. \ n ");
$ Zip-> addFile ($ thisdir. "/too. php", "/testfromfile. php ");
Echo "numfiles:". $ zip-> numFiles. "\ n ";
Echo "status:". $ zip-> status. "\ n ";
$ Zip-> close ();
?>
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2. don't think you are always right. sometimes it's right to see if others are talking about it.