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@ 2013-12-24T13:52:24Z

<?php

class Pet
{
    public $name;

    public function __construct ( $name )
    {
        $this->name = $name;
    }


    public function speak ($what)
    {
        return $what;
    }
}


class Dog extends Pet
{
    // Le he metido el null para que el parametro sea opcional
    public function speak ( $what )
    {
        return $what ? parent::speak($what) : 'Woof Woof!';

/*
// Otra alternativa para meter codigo mas complicado seria:
if($what)
	return parent::speak($what);

return 'Woof Woof';
*/

    }

    public function plays()
    {
        return 'fetch';
    }
}

$charlie = new Dog ( 'Charlie' );

echo 'The dog\'s name is ' . $charlie->name . PHP_EOL;
echo 'Speak of the super class: ' . $charlie->speak('hello, my name is ' . $charlie->name) . PHP_EOL;
echo 'Speak of the dog class: ' . $charlie->speak() . PHP_EOL;

Output for git.master, git.master_jit, rfc.property-hooks: The dog's name is Charlie Speak of the super class: hello, my name is Charlie Fatal error: Uncaught ArgumentCountError: Too few arguments to function Dog::speak(), 0 passed in /in/hT55g on line 47 and exactly 1 expected in /in/hT55g:23 Stack trace: #0 /in/hT55g(47): Dog->speak() #1 {main} thrown in /in/hT55g on line 23
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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