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@ 2015-12-07T18:24:59Z

<?php

abstract class Shape
{
	public function __construct() {}
	
	abstract public function area();
	abstract public function sides();
	
	public function info()
	{
		return "This ".get_class($this)." has ".$this->sides()." sides and an area of ".$this->area()."\n";
	}
}

class Square extends Shape
{
	public function __construct($s)
	{
		parent::__construct();
		$this->width = $s;
	}
	
	public function area()
	{
		return $this->width * $this-width;
	}
	
	public function sides()
	{
		return 4;
	}
}

class Rectangle extends Square
{
	public function __construct($w,$h)
	{
		parent::__construct($w);
		$this->height = $h;
	}

	public function area()
	{
		return $this->width * $this->height;
	}
}

class Circle extends Shape
{
	public function __construct($r)
	{
		parent::__construct();
		$this->radius = $r;
	}

	public function area()
	{
		return $this->radius * $this->radius * M_PI;
	}
	public function sides()
	{	return 1;
	}
}

$s = new Rectangle(3,15);
print($s->info());

$c = new Circle(3);
print($c->info());

$q = new Square(3);
print($q->info());

?>

Output for git.master, git.master_jit, rfc.property-hooks: Deprecated: Creation of dynamic property Rectangle::$width is deprecated in /in/D51ZQ on line 21 Deprecated: Creation of dynamic property Rectangle::$height is deprecated in /in/D51ZQ on line 40 This Rectangle has 4 sides and an area of 45 Deprecated: Creation of dynamic property Circle::$radius is deprecated in /in/D51ZQ on line 54 This Circle has 1 sides and an area of 28.274333882308 Deprecated: Creation of dynamic property Square::$width is deprecated in /in/D51ZQ on line 21 Fatal error: Uncaught TypeError: Unsupported operand types: int * Square in /in/D51ZQ:26 Stack trace: #0 /in/D51ZQ(12): Square->area() #1 /in/D51ZQ(73): Shape->info() #2 {main} thrown in /in/D51ZQ on line 26
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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