Distributing Software to Shared Hosting Customers

What do you think is the best option to distribute software to shared hosting customers? I thought of three options. Please let me know which of these options you think is the best and why, or suggest other options.

1) Put a copy of the software in every user's directory.
2) Put a copy of the software in /usr/lib/php (which everybody has read access to).
3) Put a copy in one directory and make a symbolic link to it in every user's directory.

 

 

 

 

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