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run code in 300+ PHP versions simultaneously

@ 2013-08-07T20:59:35Z

<?php

	class State {

        protected $foo;
        protected $bar;

        public function getFoo() {
            return $this->foo;
        }

        public function getBar() {
            return $this->bar;
        }

        public final function setFoo($foo) {
            $this->foo = $foo;
        }

        public final function setBar($bar) {
            $this->bar = $bar;
        }

        public final function transaction(callable $function) {
            $proxy = new StateProxy($this);
            if (call_user_func($function, $proxy)) {
                $proxy->commit();
            }
            unset($proxy);
        }

    }

    class StateProxy extends State {

        protected $state;

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

        public function getFoo() {
            return parent::getFoo() ? : $this->state->getFoo();
        }

        public function getBar() {
            return parent::getBar() ? : $this->state->getBar();
        }

        public function commit() {
            $this->state->foo = $this->foo;
            $this->state->bar = $this->bar;
        }

    }

    $state = new State();
    $state->setFoo('abc');
    $state->setBar('123');
    var_dump($state);

    $state->transaction(function(StateProxy $proxy) {
                $proxy->setFoo('def');
                $proxy->setBar('456');
                return true;
            });
    var_dump($state);

    $state->transaction(function(StateProxy $proxy) {
                $proxy->setFoo('ghi');
                $proxy->setBar('789');
                return false;
            });
    var_dump($state);


    $state = new State();
    $state->setFoo('abc');
    $state->setBar('123');

    $state->transaction(function(StateProxy $proxy) {
                $proxy->transaction(function(StateProxy $proxy) {
                            $proxy->transaction(function(StateProxy $proxy) {
                                        $proxy->transaction(function(StateProxy $proxy) {
                                                    $proxy->setFoo('def');
                                                    $proxy->setBar('456');
                                                    return false;
                                                });
                                        $proxy->transaction(function(StateProxy $proxy) {
                                                    $proxy->setFoo('ghi');
                                                    $proxy->setBar('789');
                                                    return true;
                                                });
                                        return true;
                                    });
                            $proxy->transaction(function(StateProxy $proxy) {
                                        $proxy->setFoo('jkl');
                                        $proxy->setBar('012');
                                        return false;
                                    });
                            return true;
                        });
                return true;
            });
    var_dump($state);

Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 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: object(State)#1 (2) { ["foo":protected]=> string(3) "abc" ["bar":protected]=> string(3) "123" } object(State)#1 (2) { ["foo":protected]=> string(3) "def" ["bar":protected]=> string(3) "456" } object(State)#1 (2) { ["foo":protected]=> string(3) "def" ["bar":protected]=> string(3) "456" } object(State)#2 (2) { ["foo":protected]=> string(3) "ghi" ["bar":protected]=> string(3) "789" }
Output for 5.3.0 - 5.3.29: object(State)#1 (2) { ["foo":protected]=> string(3) "abc" ["bar":protected]=> string(3) "123" } Catchable fatal error: Argument 1 passed to State::transaction() must be an instance of callable, instance of Closure given, called in /in/BfmpQ on line 66 and defined in /in/BfmpQ on line 24
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17: Parse error: syntax error, unexpected ':' in /in/BfmpQ on line 43
Process exited with code 255.
Output for 5.0.0 - 5.0.5: Parse error: parse error, unexpected ':' in /in/BfmpQ on line 43
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/BfmpQ on line 5
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, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/BfmpQ on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/BfmpQ on line 5
Process exited with code 255.

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