Online PHP editor | output for YS6Ze

@ 2016-05-02T09:36:04Z

<?php

class RewindableGenerator implements Iterator
{
    private $rewound;
    private $iteratorConstructor;
    private $iterator;
    
    function __construct(callable $iteratorConstructor){
        $this->iteratorConstructor = $iteratorConstructor;
        $this->rewind();
    }
    
    function rewind(){
        if(!$this->rewound){
            $this->iterator = ($this->iteratorConstructor)();
            $this->rewound = true;
        }
    }
    
    function next(){
        $this->iterator->next();
        $this->rewound = false;
    }
    
    function valid(){
        return $this->iterator->valid();
    }
    
    function key(){
        return $this->iterator->key();
    }
    
    function current(){
        return $this->iterator->current();
    }
}


function test(){
    yield 0;
    yield 1;
    yield 2;
    yield 3;
    yield 4;
}

function baz(){
    return new RewindableGenerator('test');
}

$gen = baz();

echo $gen->current() . " 0\n";
$gen->next();
echo $gen->current() . " 1\n";
$gen->next();
echo $gen->current() . " 2\n";
$gen->next();
echo $gen->current() . " 3\n";

echo "rewind\n";
$gen->rewind();
echo $gen->current() . " 0\n";
$gen->next();
echo $gen->current() . " 1\n";
$gen->next();
echo $gen->current() . " 2\n";

Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Deprecated: Return type of RewindableGenerator::current() should either be compatible with Iterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/YS6Ze on line 34 Deprecated: Return type of RewindableGenerator::next() should either be compatible with Iterator::next(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/YS6Ze on line 21 Deprecated: Return type of RewindableGenerator::key() should either be compatible with Iterator::key(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/YS6Ze on line 30 Deprecated: Return type of RewindableGenerator::valid() should either be compatible with Iterator::valid(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/YS6Ze on line 26 Deprecated: Return type of RewindableGenerator::rewind() should either be compatible with Iterator::rewind(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/YS6Ze on line 14 0 0 1 1 2 2 3 3 rewind 0 0 1 1 2 2
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30: 0 0 1 1 2 2 3 3 rewind 0 0 1 1 2 2
Output for 5.5.0 - 5.5.35, 5.6.0 - 5.6.28: Parse error: syntax error, unexpected '(' in /in/YS6Ze on line 16
Process exited with code 255.

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