demircan-s

<?php

class Person{
    private $surname = "Doe";
    function getSurname(callable $fn){
        return $fn($this->surname);
    }
}

echo (new Person())->getSurname("strtoupper"); //DOE

demircan-s

<?php
require_once "vendor/autoload.php";

function printStatus(CharacterUndoDecorator $decorator)
{
    list('x' => $x,'y' => $y,'speed' => $speed) = $decorator->getXYAndSpeed();
    echo "Current Status: x:{$x}, y:{$y}, speed:{$speed}" . "<br> \n";
}

function undoAndPrint(CharacterUndoDecorator $decorator)

demircan-s

<?php

class CharacterUndoDecorator implements CharacterInterface
{

    private CharacterInterface $character;
    private array $undoStack = [];
    
    public function __construct(CharacterInterface $character)
    {

demircan-s

<?php

class Human implements CharacterInterface
{
    private int $x,$y,$speed;

    public function __construct(int $x = 0,int $y = 0,int $speed = 3)
    {
        $this->x = $x;
        $this->y = $y;

demircan-s

<?php


class Bird implements CharacterInterface
{
    private int $x,$y,$speed;

    public function __construct(int $x = 0,int $y = 0,int $speed = 5)
    {
        $this->x = $x;

demircan-s

<?php

interface CharacterInterface
{
    public function moveInXAxis(int $times): void;

    public function moveInYAxis(int $times): void;

    public function changeSpeed(int $change): void;

demircan-s

<?php

$math = function(int ...$args) : array{
    $operations = [];
    $operations["Addition"] = function() use ($args){
        $result = 0;
        foreach($args as $val)
            $result += $val;
            
        return $result;

demircan-s

<?php
function hello(){
    return function() {
        echo "Hello";
    };
}

echo get_class( hello() ); // Closure

demircan-s

<?php
//It takes a function as an argument
function execute(callable $myFunc)
{
    $myFunc();
}

//Prints "Hello there!"
execute(function(){
    echo "Hello there!";

demircan-s

<?php

function sum(int ...$args){
    $sumVal = 0;
    for($i = 0;$i < count($args);$i++)
        $sumVal += $args[$i];
    
    return $sumVal;
}