Php examples

examples-per-language/php/behavioral/Chain_Of_Responsibility.php

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+<?php
+
+use designPatternsForHumans\behavioral\Chain_Of_Responsibility\Bank;
+use designPatternsForHumans\behavioral\Chain_Of_Responsibility\BitCoin;
+use designPatternsForHumans\behavioral\Chain_Of_Responsibility\Paypal;
+
+require_once __DIR__ . '/autoload.php';
+
+// Let's prepare a chain like below
+//      $bank->$paypal->$bitcoin
+
+$bank = new Bank(100);
+$paypal = new Paypal(200);
+$bitcoin = new BitCoin(300);
+
+//      First priority bank
+//      If bank can't pay then paypal
+//      If paypal can't pay then bit coin.
+$bank->setNext($paypal);
+$paypal->setNext($bitcoin);
+
+// Let's try and pay our bill.
+$bank->pay(259);

examples-per-language/php/behavioral/Command.php

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+<?php
+
+require_once __DIR__ . '/autoload.php';
+
+use designPatternsForHumans\behavioral\Command\Bulb;
+use designPatternsForHumans\behavioral\Command\RemoteControl;
+use designPatternsForHumans\behavioral\Command\TurnOff;
+use designPatternsForHumans\behavioral\Command\TurnOn;
+
+$bulb = new Bulb();
+
+$turnOn = new TurnOn($bulb);
+$turnOff = new TurnOff($bulb);
+
+$remote = new RemoteControl();
+$remote->submit($turnOn);
+$remote->submit($turnOff);

examples-per-language/php/behavioral/Iterator.php

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+<?php
+
+use designPatternsForHumans\behavioral\Iterator\RadioStation;
+use designPatternsForHumans\behavioral\Iterator\StationList;
+
+require_once __DIR__ . '/autoload.php';
+
+$stationList = new StationList();
+
+$stationList->addStation(new RadioStation(89));
+$stationList->addStation(new RadioStation(101));
+$stationList->addStation(new RadioStation(102));
+$stationList->addStation(new RadioStation(103.2));
+
+/** @var RadioStation $station */
+echo 'These are the known Radio Stations' . PHP_EOL;
+foreach ($stationList as $station) {
+    echo $station->getFrequency(). PHP_EOL;
+}
+
+$stationList->removeStation(new RadioStation(89));
+
+// To prove the station was indeed removed, we iterate through the list again.
+// Small caveat : Iterators need to be rewinded after beeing Iterated!
+$stationList->rewind();
+
+/** @var RadioStation $station */
+echo 'These are the known Radio Stations' . PHP_EOL;
+foreach ($stationList as $station) {
+    echo $station->getFrequency(). PHP_EOL;
+}

examples-per-language/php/behavioral/Mediator.php

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+<?php
+
+use designPatternsForHumans\behavioral\Mediator\ChatRoom;
+use designPatternsForHumans\behavioral\Mediator\User;
+
+require_once __DIR__ . '/autoload.php';
+
+$mediator = new ChatRoom();
+
+$john = new User('John Doe', $mediator);
+$jane = new User('Jane Doe', $mediator);
+
+$john->send('Hi there!');
+$jane->send('Hey!');

examples-per-language/php/behavioral/Memento.php

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+<?php
+
+use designPatternsForHumans\behavioral\Memento\Editor;
+
+require_once __DIR__ . '/autoload.php';
+
+$editor = new Editor();
+
+$editor->type('This is the first sentence' . PHP_EOL);
+$editor->type('This is the second sentence' . PHP_EOL);
+
+$saved = $editor->save();
+
+$editor->type('And this is the third one.' . PHP_EOL);
+
+echo $editor->getContent();
+
+$editor->restore($saved);
+echo 'Restored $editor.' . PHP_EOL;
+echo $editor->getContent();

examples-per-language/php/behavioral/Observer.php

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+<?php
+
+use designPatternsForHumans\behavioral\Observer\JobPost;
+use designPatternsForHumans\behavioral\Observer\JobPostings;
+use designPatternsForHumans\behavioral\Observer\JobSeeker;
+
+require_once __DIR__ . '/autoload.php';
+
+$john = new JobSeeker('John Doe');
+$jane = new JobSeeker('Jane Doe');
+
+$jobPostings = new JobPostings();
+$jobPostings->attach($john);
+$jobPostings->attach($jane);
+
+$jobPostings->add(new JobPost('Software Engineer'));

examples-per-language/php/behavioral/State.php

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+<?php
+
+use designPatternsForHumans\behavioral\State\DefaultState;
+use designPatternsForHumans\behavioral\State\LowerCase;
+use designPatternsForHumans\behavioral\State\TextEditor;
+use designPatternsForHumans\behavioral\State\UpperCase;
+
+require_once __DIR__ . '/autoload.php';
+
+$editor = new TextEditor(new DefaultState());
+
+$editor->type('First line');
+
+$editor->setState(new UpperCase());
+
+$editor->type('Second line');
+$editor->type('Third line');
+
+$editor->setState(new LowerCase());
+
+$editor->type('Fourth line');
+$editor->type('Fifth line');

examples-per-language/php/behavioral/Strategy.php

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+<?php
+
+use designPatternsForHumans\behavioral\Strategy\BubbleSortStrategy;
+use designPatternsForHumans\behavioral\Strategy\QuickSortStrategy;
+use designPatternsForHumans\behavioral\Strategy\Sorter;
+
+require_once __DIR__ . '/autoload.php';
+
+$dataset = [1, 5, 2, 6, 3];
+
+$sorter = new Sorter(new BubbleSortStrategy());
+$sorter->sort($dataset);
+
+$sorter = new Sorter(new QuickSortStrategy());
+$sorter->sort($dataset);

examples-per-language/php/behavioral/Template.php

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+<?php
+
+use designPatternsForHumans\behavioral\Template\AndroidBuilder;
+use designPatternsForHumans\behavioral\Template\IosBuilder;
+
+require_once __DIR__ . '/autoload.php';
+
+$androidBuilder = new AndroidBuilder();
+$androidBuilder->build();
+
+$iosBuilder = new IosBuilder();
+$iosBuilder->build();

examples-per-language/php/behavioral/Visitor.php

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+<?php
+
+use designPatternsForHumans\behavioral\Visitor\Dolphin;
+use designPatternsForHumans\behavioral\Visitor\Jump;
+use designPatternsForHumans\behavioral\Visitor\Lion;
+use designPatternsForHumans\behavioral\Visitor\Monkey;
+use designPatternsForHumans\behavioral\Visitor\Speak;
+
+require_once __DIR__ . '/autoload.php';
+
+$monkey = new Monkey();
+$lion = new Lion();
+$dolphin = new Dolphin();
+
+// This is the visitor.
+$speak = new Speak();
+
+$monkey->accept($speak);
+$lion->accept($speak);
+$dolphin->accept($speak);
+
+// Using the Visitor pattern it becomes easy to 'add' new functionality to
+// the animals. Declare functionality in a class that implements Visitor.
+
+$jump = new Jump();
+
+$monkey->accept($jump);
+$lion->accept($jump);
+$dolphin->accept($jump);

examples-per-language/php/behavioral/autoload.php

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+<?php
+
+spl_autoload_register(function($className) {
+  $explode = explode("\\", $className);
+  $slice = array_slice($explode, -2, 2);
+  require_once 'src' .  DIRECTORY_SEPARATOR . implode(DIRECTORY_SEPARATOR, $slice) . '.php';
+});

examples-per-language/php/behavioral/src/Chain_Of_Responsibility/Account.php

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+<?php
+
+namespace designPatternsForHumans\behavioral\Chain_Of_Responsibility;
+
+abstract class Account
+{
+    protected $balance;
+    /** @var  Account */
+    protected $successor;
+
+    public function setNext(Account $account)
+    {
+        $this->successor = $account;
+    }
+
+    public function pay($amountToPay)
+    {
+        if ($this->canPay($amountToPay)) {
+            echo sprintf('Paid %s using %s' . PHP_EOL, $amountToPay,
+              get_called_class());
+        } elseif ($this->successor) {
+            echo sprintf('Cannot pay using %s. Proceeding ...' . PHP_EOL,
+              get_called_class());
+            $this->successor->pay($amountToPay);
+        } else {
+            throw new \Exception('None of the accounts have enough balance');
+        }
+    }
+
+    public function canPay($amount)
+    {
+        return $this->balance >= $amount;
+    }
+}

examples-per-language/php/behavioral/src/Chain_Of_Responsibility/Bank.php

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+<?php
+
+namespace designPatternsForHumans\behavioral\Chain_Of_Responsibility;
+
+
+class Bank extends Account
+{
+    // In the example the balance property is redefined, but that is not
+    // necessary, since we extend Account, which has that property.
+
+
+    public function __construct($balance)
+    {
+        $this->balance = $balance;
+    }
+}

examples-per-language/php/behavioral/src/Chain_Of_Responsibility/BitCoin.php

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+<?php
+
+namespace designPatternsForHumans\behavioral\Chain_Of_Responsibility;
+
+
+class BitCoin extends Account
+{
+    // In the example the balance property is redefined, but that is not
+    // necessary, since we extend Account, which has that property.
+
+
+    public function __construct($balance)
+    {
+        $this->balance = $balance;
+    }
+}

examples-per-language/php/behavioral/src/Chain_Of_Responsibility/Paypal.php

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+<?php
+
+namespace designPatternsForHumans\behavioral\Chain_Of_Responsibility;
+
+
+class Paypal extends Account
+{
+    // In the example the balance property is redefined, but that is not
+    // necessary, since we extend Account, which has that property.
+
+
+    public function __construct($balance)
+    {
+        $this->balance = $balance;
+    }
+}

examples-per-language/php/behavioral/src/Command/Bulb.php

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+<?php
+
+namespace designPatternsForHumans\behavioral\Command;
+
+
+// This is the receiver, it has the implementation of the actions we want to perform.
+class Bulb
+{
+    public function turnOn()
+    {
+        echo 'Bulb has been lit!' . PHP_EOL;
+    }
+
+    public function turnOff()
+    {
+        echo 'Darkness!' . PHP_EOL;
+    }
+
+}

examples-per-language/php/behavioral/src/Command/Command.php

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+<?php
+
+namespace designPatternsForHumans\behavioral\Command;
+
+
+interface Command
+{
+    public function execute();
+    public function undo();
+    public function redo();
+
+}

examples-per-language/php/behavioral/src/Command/RemoteControl.php

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+<?php
+
+namespace designPatternsForHumans\behavioral\Command;
+
+// This is the invoker, this will be used by client to interact.
+class RemoteControl
+{
+    public function submit(Command $command)
+    {
+        $command->execute();
+    }
+
+}

examples-per-language/php/behavioral/src/Command/TurnOff.php

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+<?php
+
+namespace designPatternsForHumans\behavioral\Command;
+
+
+class TurnOff implements Command
+{
+
+    protected $bulb;
+
+    public function __construct(Bulb $bulb)
+    {
+        $this->bulb = $bulb;
+    }
+
+    public function execute()
+    {
+        $this->bulb->turnOff();
+    }
+
+    public function undo()
+    {
+        $this->bulb->turnOn();
+    }
+
+    public function redo()
+    {
+        $this->execute();
+    }
+}