<?php


class ProcessIterator implements Iterator
{
    private $stream;
    private $command;
    private $iteration = 0;

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

    public function rewind()
    {
        $this->stream = popen($this->command, 'r');
        $this->iteration = 0;
    }

    public function current()
    {
        return fgets($this->stream);
    }

    public function key()
    {
        return $this->iteration;
    }

    public function next()
    {
        $this->iteration++;
    }

    public function valid()
    {
        return !feof($this->stream);
    }
}


$processIterator = new ProcessIterator(__DIR__ . '/tmpeee.sh');

foreach ($processIterator as $i => $result) {
    echo "$i Time : " .(microtime(true) - $_SERVER["REQUEST_TIME_FLOAT"]) . ", result : " . $result . "\n";
    if ($i == 9) {
        echo "php sleeping for 8\n";
        sleep(8);
    }
}