Online PHP editor | output for YUlRU

@ 2014-06-20T00:33:13Z

<?php

// explicit mention of methods that should be fluent
// would be preferable to returning $this on null
// since a method may very well return null as something
// that is expected.

interface Something {
    public function bar();
    public function baz();
    public function bat();
}

interface SomethingFluent extends Something {
    public function bar();
    public function baz();
    public function bat();
}

class Foo implements Something
{
    public function bar()
    {
        var_dump(__METHOD__);
    }

    public function baz()
    {
        var_dump(__METHOD__);
    }

    public function bat()
    {
        var_dump(__METHOD__);

        return 'bat!';
    }
}

class FluentWrapper implements SomethingFluent
{
    private $instance;
    private $fluentMethods;
    public function __construct($instance, array $fluentMethods = array())
    {
        $this->instance = $instance;
        $this->fluentMethods = $fluentMethods;
    }

    public function __call($name, $args)
    {
        $result = call_user_func(array($this->instance, $name), $args);

        return in_array($name, $this->fluentMethods) ? $this : $result;
    }
}

class FluentFoo extends FluentWrapper
{
	public function __construct(Foo $foo)
    {
        parent::__construct($foo, array('bar', 'baz'));
    }
}


$foo = new FluentFoo(new Foo());

$bat = $foo
    ->bar()
    ->baz()
    ->bar()
    ->baz()
    ->bat();

print $bat."\n";

Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 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: Class FluentWrapper contains 3 abstract methods and must therefore be declared abstract or implement the remaining methods (SomethingFluent::bar, SomethingFluent::baz, SomethingFluent::bat) in /in/YUlRU on line 40
Process exited with code 255.
Output for 5.3.9 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28: Fatal error: Class FluentWrapper contains 3 abstract methods and must therefore be declared abstract or implement the remaining methods (SomethingFluent::bar, SomethingFluent::baz, SomethingFluent::bat) in /in/YUlRU on line 56
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.8: Fatal error: Can't inherit abstract function Something::bar() (previously declared abstract in SomethingFluent) in /in/YUlRU on line 14
Process exited with code 255.
Output for 5.0.0 - 5.0.5: Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/YUlRU on line 44
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected T_STRING in /in/YUlRU on line 8
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/YUlRU on line 8
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error in /in/YUlRU on line 8
Process exited with code 255.

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