<?php

$in  = uv_pipe_init(uv_default_loop(), true);

echo "HELLO ";

$stdio = array();
$stdio[] = uv_stdio_new($in, UV::CREATE_PIPE | UV::READABLE_PIPE);

$fp = fopen("php://stdout", "w");
$stdio[] = uv_stdio_new($fp, UV::INHERIT_FD | UV::WRITABLE_PIPE);

$flags = 0;
uv_spawn(uv_default_loop(), "php", ['-r', 'var_dump($_ENV);'], $stdio, "/usr/bin/", 
    ["key" => "hello"], 
    function($process, $stat, $signal){
	    uv_close($process,function(){});

    }, $flags);

uv_run();