Code to use interface to implement factory design pattern in php_PHP tutorial

//Human interface
interface IHuman
{
function GetName();
}
//Male human, implements human interface
class ManClass implements IHuman
{
//Get name method
public function GetName ()
{
return "I'm man."."
";
}
}
//Female human, implements human interface
class WomanClass implements IHuman
{
//Get name method
public function GetName()
{
return "I'm Woman."."
";
}
}
//Class factory, produce different instance objects as needed and return
class ManFactory
{
//Get instance objects according to parameters
public function GetIHuman($IHuman="man")
{
if($IHuman=="woman")
{
return new WomanClass();
}
else if($IHuman=="man")
{
return new ManClass();
}
else
{
return null;
}
}
//Get the woman class directly
public function GetWoman()
{
return new WomanClass();
//return new ManClass();
}
//Get the man class directly
public function GetMan()
{
return new ManClass();
}
}
$ManFactory=new ManFactory();
$ManClass=$ManFactory->GetIHuman();
echo $ManClass->GetName();
$IHuman=$ManFactory->GetIHuman("woman");
echo $IHuman->GetName();
$Woman=$ManFactory-> ;GetWoman();
echo $Woman->GetName();
$Man=$ManFactory->GetMan();
echo $Man->GetName();
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