Thank you for your attention to this matter.
I just installed the Multichain and follow the guideline from "web-demo", however, I only can see "ERROR 401 unauthorised" at all the PHP pages.
The steps that I have done:
Step 1:
multichain-util create chain1
multichaind chain1 -daemon
( As the web server is running on the same computer, therefore, I do not need to motifty "rpcallowip" )
Step 2:
nano ~/.multichain/chain1/multichain.conf --> rpcuser=user rpcpassword=user123
The rpc-port is 7200
Step 3: In the demo website directory config.txt
default.name=Default # name to display in the web interface
default.rpchost=127.0.0.1 # IP address of MultiChain node
default.rpcport=7200 # see rpc-port from chain parameters
default.rpcuser=user # username for RPC from multichain.conf
default.rpcpassword=user123 # password for RPC from multichain.conf