The problem

If you are outside docker and/or don't have permissions to write into PHP's config directory.

• cargo php install will fail if normal user don't have permissions to copy file or write to .ini file.
• sudo cargo php install is likely to fail with cargo not found error since cargo is typically installed in user's ~/.cargo/bin directory.
• sudo ~/.cargo/bin/cargo php install is likely to rebuild and change the owner to root of many intermediate files to make normal cargo b to fail.

Solution: before copying file or editing INI file, check if it requires admin privilege and use sudo2 or elevate crate to escalate privilege.