Step Chain in PHP

The method chain in PHP
In many frameworks, such as zend,cakephp, you will see the invocation of a class like
$obj->foo ()->bar ()->anothermethod ();
This is actually the use of the method chain in PHP call method, below to see an example to understand:
Class Person
{
Private $name;
Private $age;

Public Function SetName ($Name)
{
$this->name = $Name;
}

Public Function Setage ($AGE)
{
$this->age = $Age;
}

Public Function Findme ()
{
echo "My name is". $this->name. "and I AM". $this->age. "Years";
}
}

Normal method of invocation:
$myself = new Person ();
$myself->setname (' Arvind Bhardwaj ');
$myself->setage (' 22 ');
$myself->findme ();

Using the method chain:
Class Person
{
Private $name;
Private $age;

Public Function SetName ($Name)
{
$this->name = $Name;
return $this;//returns object of ' this ' i.e person class
}

Public Function Setage ($AGE)
{
$this->age = $Age;
return $this;//again returns object of ' this ' i.e the Person class
}

Public Function Findme ()
{
echo "My name is". $this->name. "and I AM". $this->age. "Years";
}
}
When called, you can:
$myself = new Person ();
$myself->setname (' Arvind Bhardwaj ')->setage (' n ')->findme ();

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