Arrow Operator

PHP
1

How are people able to use the arrow operator like this:

$this->something->something();
2

http://us3.php.net/manual/en/language.oop.php
http://us3.php.net/manual/en/language.oop5.php

3

It’s used in object oriented code and can refer to a method or property of an object.


class person { 
public $name; 
}; 
$john = new person(); 
$john->name = 'John'; 
echo $john->name;
<WhiteVAL> Return: John
4 

class one
{
	public $one = "I'm in one<br />";

	public function test()
	{
		echo "I'm in one too";
	}
}

class two
{
	private $d;

	public function __construct()
	{
		$this->d = new one();

		echo $this->d->one;

		$this->d->test();
	}
}

$two = new two();
5

You can also daisy chain methods by returning $this.

class Test
{
    public function foo()
    {
        return $this;
    }   
    
    public function bar()
    {
        return $this;
    }   
}   


$test = new Test();
$test->foo()
     ->bar()
     ->foo()
     ->bar()
     ->foo()
     ->bar();
6

or even:


class one
{
	public $one = "I'm in one<br />";

    public function test()
    {
		echo "I'm in one too";
    }
}

class two
{
    private $d;

    public function __construct(one $d)
    {
        $this->d = $d;

        echo $this->d->one;

        $this->d->test();
    }
}

$one = new one();

$two = new two($one);
7

Thank you all so much :slight_smile: