include("libvirt/libvirt.php");
$Libvirt = new Libvirt();
$Libvirt->setHost("192.168.3.181", 22, "/data/libvirt/");
$Libvirt->connect("root", "123456");

This code will connect to your server using SSH, make sure your server sshd service is running.

The 192.168.3.181 is your server hostname, 22 is your server port, and /data/libvirt/ is your libvirt images save path.

For authenticate, use username and password, the username and password in example code is root and 123456.

Example code for create a virtual machine

$Libvirt->createDisk("Test", "qcow2", "30G");
$Libvirt->createVMXML("Test", 2, 2048576, "/data/libvirt/images/Test/Test.qcow2", "/data/iso/CentOS-7-x86_64-Minimal-1804.iso", "cdrom", "network", "default", $Libvirt->randomMac(), "virbr0", 0, 0, 5902);
$Libvirt->define("/data/libvirt/Test.xml");
$Libvirt->setPermission("Test");
$Libvirt->start("Test");

Create a virtual disk

String createDisk ( Name, Format, Size )

create a Virtual Machine xml config file

The method of createVMXML have 13 args.

void createVMXL ( Name, vCPU, Ram, Disk, ISO, Boot Device, Network type, Network name, MAC Address, Network bridge, Bandwidth in, Bandwidth out, VNC Port )

Register the xml config file to system

String defind ( XML File Path )

Set execute permission

void setPermission ( Name )

Start the virtual machine

String start ( Name )

You can find out more info in libvirt/libvirt.php