Hello...!

I want to create a new domain using libvirt-php, and after creating I want to start it.
I have seen this to create new domain:

libvirt_domain_new($conn, $name, $arch, $memMB, $maxmemMB, $vcpus, $iso_image, $disks, $networks, $flags)

So in the above sysntax what should I pass in $iso_image? $disk? $networks and $flag??
Please give me a complete example that can solve my problem.
Thanks..