What is worldwide port number (WWPN) .
A worldwide port number (WWPN) is unique identifier for each FC port of any Fibre Channel device. For server, we have a WWPN for each port of the HBA. For a SAN switch, the WWPN is available for each port in the chassis. For Storage, each host port has an individual WWPN .

function Get-VMHostWWPN {
param(
[string]$cluster
)
Get-Cluster $cluster | get-vmhost | get-vmhosthba -type FibreChannel |
format-table VMHost, Device, @{
n='WorldWidePortName';e={[convert]::ToString($_.PortWorldWideName, 16)}
}
}
Thanks hope you like it.
Rajiv Pandey.