how manage password protected zip file via PHP?

[reza21681]

Hi
With PHP you could create zip files and even in newest version you could set Password for your zip file. but how I can add new data to the password protected zipped file?

in PHP you could add file to the zipped file without extracting it. but I want to do same for password protected zipped file.
one of the ways is using

echo shell_exec('unzip -P password file.zip');

but it will extract zipped file and it will be accessible via server admin. it should done without extracting or if there is no other way, is any way to extract it on-memory?

the other way that I was thinking about is:
add a zipped file without any password protection. then I can change the suffix from .zip to something like .jpg.
then server admin could not open it with winzip and winrar or anything like that, but I could not access it via PHP too :D

do you have any suggestion?

thanks a lot
Reza