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run code in 300+ PHP versions simultaneously

@ 2013-04-18T10:12:33Z

<?php

namespace GeneratorExample;

class Pipeline
{
    protected $generators = [];

    function __construct()
	{
    }

    function add(callable $generator)
    {
        $this->generators[] = $generator;
        return $this;
    }

    function __invoke()
    {
		$inputs = func_get_args();

        foreach ($this->generators as $g) {
            $generator = call_user_func_array($g, $inputs);
            $inputs = [$generator];
        }

        return $generator;
    }
}

function uppercase(\Traversable $in)
{
    foreach ($in as $word) {
        yield strtoupper($word);
    }
}

function reverse(\Traversable $in)
{
    foreach ($in as $word) {
        yield strrev($word);
    }
}

function each_println(\Traversable $in)
{
    foreach ($in as $line) {
        echo "$line\n";
    }
}

$words = new \ArrayIterator(["foo", "bar", "baz"]);

$p = new Pipeline;
$p->add("GeneratorExample\\uppercase")->add("GeneratorExample\\reverse")->add("GeneratorExample\\each_println");
$p($words);

Output for 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: OOF RAB ZAB
Output for 5.4.0 - 5.4.45: Parse error: syntax error, unexpected 'strtoupper' (T_STRING) in /in/RFUDY on line 35
Process exited with code 255.
Output for 5.3.0 - 5.3.29: Parse error: syntax error, unexpected '[' in /in/RFUDY on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17: Parse error: syntax error, unexpected T_STRING in /in/RFUDY 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, 5.0.0 - 5.0.5: Parse error: parse error, unexpected T_STRING in /in/RFUDY on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error in /in/RFUDY on line 3
Process exited with code 255.

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