Online PHP editor | output for QKvIW

@ 2014-05-23T22:25:59Z

<?php

interface IWidget
{

}

class WidgetA implements IWidget
{

}

class WidgetB implements IWidget
{

}

interface IWidgetFactory
{

    function tryCreateWidget($someInput, IWidget &$widget);

}

class WidgetAFactory implements IWidgetFactory
{

    public function tryCreateWidget($someInput, IWidget &$widget)
    {
        if ($someInput < 7) {
            $widget = new WidgetA();
            return true;
        }
        return false;
    }

}

class WidgetBFactory implements IWidgetFactory
{

    public function tryCreateWidget($someInput, IWidget &$widget)
    {
        if ($someInput > 10) {
            $widget = new WidgetB();
            return true;
        }
        return false;
    }

}

class WidgetFactoryAggregate implements IWidgetFactory
{

    private $widgetFactories = [];

    function __construct(array $widgetFactories)
    {
        $this->widgetFactories = $widgetFactories;
    }

    public function tryCreateWidget($someInput, IWidget &$widget)
    {
        foreach ($this->widgetFactories as $widgetFactory) {
            if ($widgetFactory->tryCreateWidget($someInput)) {
                return true;
            }
        }
        return false;
    }

}

$widgetFactory = new WidgetFactoryAggregate([
    new WidgetAFactory(),
    new WidgetBFactory(),
]);

foreach ([1, 5, 15, 9] as $someInput) {
    $widget = null;
    if ($widgetFactory->tryCreateWidget($someInput, $widget)) {
        var_dump($widget);
        continue;
    }
    throw new Exception("Failed to create widget for {$someInput}");
}

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Fatal error: Uncaught TypeError: WidgetFactoryAggregate::tryCreateWidget(): Argument #2 ($widget) must be of type IWidget, null given, called in /in/QKvIW on line 82 and defined in /in/QKvIW:63 Stack trace: #0 /in/QKvIW(82): WidgetFactoryAggregate->tryCreateWidget(1, NULL) #1 {main} thrown in /in/QKvIW on line 63
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33: Fatal error: Uncaught TypeError: Argument 2 passed to WidgetFactoryAggregate::tryCreateWidget() must implement interface IWidget, null given, called in /in/QKvIW on line 82 and defined in /in/QKvIW:63 Stack trace: #0 /in/QKvIW(82): WidgetFactoryAggregate->tryCreateWidget(1, NULL) #1 {main} thrown in /in/QKvIW on line 63
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28: Catchable fatal error: Argument 2 passed to WidgetFactoryAggregate::tryCreateWidget() must implement interface IWidget, null given, called in /in/QKvIW on line 82 and defined in /in/QKvIW on line 63
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: Parse error: syntax error, unexpected '[' in /in/QKvIW on line 56
Process exited with code 255.
Output for 5.0.0 - 5.0.5: Parse error: parse error, unexpected '[' in /in/QKvIW on line 56
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected T_STRING in /in/QKvIW on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1: Parse error: parse error, unexpected T_STRING in /in/QKvIW on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error in /in/QKvIW on line 3
Process exited with code 255.

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